Merge pull request #278 from qqqasdwx/feature/cloudflare-temp-email-fixed-subdomain

feat: 支持 Cloudflare Temp Email 固定子域

background.js

@@ -371,6 +371,7 @@ const {
 } = self.LuckMailUtils;
 const {
   DEFAULT_MAIL_PAGE_SIZE: CLOUDFLARE_TEMP_EMAIL_DEFAULT_PAGE_SIZE,
+  buildCloudflareTempEmailEffectiveDomain,
   buildCloudflareTempEmailHeaders,
   getCloudflareTempEmailAddressFromResponse,
   joinCloudflareTempEmailUrl,
@@ -379,6 +380,7 @@ const {
   normalizeCloudflareTempEmailDomain,
   normalizeCloudflareTempEmailDomains,
   normalizeCloudflareTempEmailMailApiMessages,
+  normalizeCloudflareTempEmailSubdomainPrefix,
 } = self.CloudflareTempEmailUtils;
 const {
   DEFAULT_MAIL_PAGE_SIZE: CLOUD_MAIL_DEFAULT_PAGE_SIZE,
@@ -1428,6 +1430,8 @@ const PERSISTED_SETTING_DEFAULTS = {
   cloudflareTempEmailLookupMode: DEFAULT_CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE,
   cloudflareTempEmailReceiveMailbox: '',
   cloudflareTempEmailUseRandomSubdomain: false,
+  cloudflareTempEmailUseFixedSubdomain: false,
+  cloudflareTempEmailSubdomainPrefix: '',
   cloudflareTempEmailDomain: '',
   cloudflareTempEmailDomains: [],
   cloudMailBaseUrl: '',
@@ -2899,16 +2903,25 @@ function getHotmailServiceSettings(state = {}) {
 }
 
 function getCloudflareTempEmailConfig(state = {}) {
-  return {
+  const useFixedSubdomain = Boolean(state.cloudflareTempEmailUseFixedSubdomain);
+  const subdomainPrefix = normalizeCloudflareTempEmailSubdomainPrefix(state.cloudflareTempEmailSubdomainPrefix);
+  const domain = normalizeCloudflareTempEmailDomain(state.cloudflareTempEmailDomain);
+  const config = {
     baseUrl: normalizeCloudflareTempEmailBaseUrl(state.cloudflareTempEmailBaseUrl),
     adminAuth: String(state.cloudflareTempEmailAdminAuth || ''),
     customAuth: String(state.cloudflareTempEmailCustomAuth || ''),
     lookupMode: normalizeCloudflareTempEmailLookupMode(state.cloudflareTempEmailLookupMode),
     receiveMailbox: normalizeCloudflareTempEmailReceiveMailbox(state.cloudflareTempEmailReceiveMailbox),
-    useRandomSubdomain: Boolean(state.cloudflareTempEmailUseRandomSubdomain),
-    domain: normalizeCloudflareTempEmailDomain(state.cloudflareTempEmailDomain),
+    useRandomSubdomain: useFixedSubdomain ? false : Boolean(state.cloudflareTempEmailUseRandomSubdomain),
+    useFixedSubdomain,
+    subdomainPrefix,
+    domain,
     domains: normalizeCloudflareTempEmailDomains(state.cloudflareTempEmailDomains),
   };
+  return {
+    ...config,
+    effectiveDomain: buildCloudflareTempEmailEffectiveDomain(config),
+  };
 }
 
 function normalizeCloudflareTempEmailReceiveMailbox(value = '') {
@@ -3402,6 +3415,7 @@ function normalizePersistentSettingValue(key, value) {
     case 'autoDeleteUsedIcloudAlias':
     case 'accountRunHistoryTextEnabled':
     case 'cloudflareTempEmailUseRandomSubdomain':
+    case 'cloudflareTempEmailUseFixedSubdomain':
       return Boolean(value);
     case 'icloudHostPreference':
       return normalizeIcloudHost(value) || 'auto';
@@ -3455,6 +3469,8 @@ function normalizePersistentSettingValue(key, value) {
       return normalizeCloudflareTempEmailLookupMode(value);
     case 'cloudflareTempEmailReceiveMailbox':
       return normalizeCloudflareTempEmailReceiveMailbox(value);
+    case 'cloudflareTempEmailSubdomainPrefix':
+      return normalizeCloudflareTempEmailSubdomainPrefix(value);
     case 'cloudflareTempEmailDomain':
       return normalizeCloudflareTempEmailDomain(value);
     case 'cloudflareTempEmailDomains':
@@ -3613,6 +3629,9 @@ function buildPersistentSettingsPayload(input = {}, options = {}) {
     }
     payload.cloudflareTempEmailDomains = domains;
   }
+  if (payload.cloudflareTempEmailUseFixedSubdomain) {
+    payload.cloudflareTempEmailUseRandomSubdomain = false;
+  }
   if (payload.cloudMailDomains) {
     const domains = normalizeCloudMailDomains(payload.cloudMailDomains);
     if (payload.cloudMailDomain && !domains.includes(payload.cloudMailDomain)) {
@@ -11840,6 +11859,7 @@ function getCurrentPayPalAccount(state = null) {
 const generatedEmailHelpers = self.MultiPageGeneratedEmailHelpers?.createGeneratedEmailHelpers({
   addLog,
   buildGeneratedAliasEmail,
+  buildCloudflareTempEmailEffectiveDomain,
   buildCloudflareTempEmailHeaders,
   CLOUDFLARE_TEMP_EMAIL_GENERATOR,
   CUSTOM_EMAIL_POOL_GENERATOR,

background/generated-email-helpers.js

@@ -5,6 +5,7 @@
     const {
       addLog,
       buildGeneratedAliasEmail,
+      buildCloudflareTempEmailEffectiveDomain,
       buildCloudflareTempEmailHeaders,
       CLOUDFLARE_TEMP_EMAIL_GENERATOR,
       CUSTOM_EMAIL_POOL_GENERATOR,
@@ -92,6 +93,12 @@
       if (requireDomain && !config.domain) {
         throw new Error('Cloudflare Temp Email 域名为空或格式无效。');
       }
+      if (config.useFixedSubdomain && !config.effectiveDomain && typeof buildCloudflareTempEmailEffectiveDomain === 'function') {
+        config.effectiveDomain = buildCloudflareTempEmailEffectiveDomain(config);
+      }
+      if (requireDomain && config.useFixedSubdomain && !config.effectiveDomain) {
+        throw new Error('Cloudflare Temp Email 固定子域前缀为空或格式无效。');
+      }
       return config;
     }
 
@@ -159,11 +166,16 @@
         requireDomain: true,
       });
       const requestedName = String(options.localPart || options.name || '').trim().toLowerCase() || generateCloudflareAliasLocalPart();
+      const effectiveDomain = config.effectiveDomain || (
+        typeof buildCloudflareTempEmailEffectiveDomain === 'function'
+          ? buildCloudflareTempEmailEffectiveDomain(config)
+          : config.domain
+      );
       const payload = {
         enablePrefix: true,
-        enableRandomSubdomain: Boolean(config.useRandomSubdomain),
+        enableRandomSubdomain: config.useFixedSubdomain ? false : Boolean(config.useRandomSubdomain),
         name: requestedName,
-        domain: config.domain,
+        domain: effectiveDomain,
       };
       const result = await requestCloudflareTempEmailJson(config, '/admin/new_address', {
         method: 'POST',

cloudflare-temp-email-utils.js

@@ -58,6 +58,29 @@
     return domains;
   }
 
+  function normalizeCloudflareTempEmailSubdomainPrefix(rawValue = '') {
+    let value = String(rawValue || '').trim().toLowerCase();
+    if (!value) return '';
+    value = value.replace(/^@+/, '');
+    value = value.replace(/^https?:\/\//, '');
+    value = value.replace(/\/.*$/, '');
+    value = value.replace(/^\.+|\.+$/g, '');
+    if (!/^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/.test(value)) {
+      return '';
+    }
+    return value;
+  }
+
+  function buildCloudflareTempEmailEffectiveDomain(config = {}) {
+    const domain = normalizeCloudflareTempEmailDomain(config.domain);
+    if (!domain) return '';
+    const useFixedSubdomain = Boolean(config.useFixedSubdomain);
+    const subdomainPrefix = normalizeCloudflareTempEmailSubdomainPrefix(config.subdomainPrefix);
+    if (!useFixedSubdomain) return domain;
+    if (!subdomainPrefix) return '';
+    return `${subdomainPrefix}.${domain}`;
+  }
+
   function buildCloudflareTempEmailHeaders(config = {}, options = {}) {
     const headers = {};
     const adminAuth = firstNonEmptyString([config.adminAuth, config.cloudflareTempEmailAdminAuth]);
@@ -563,6 +586,7 @@
 
   return {
     DEFAULT_MAIL_PAGE_SIZE,
+    buildCloudflareTempEmailEffectiveDomain,
     buildCloudflareTempEmailHeaders,
     getCloudflareTempEmailAddressFromResponse,
     joinCloudflareTempEmailUrl,
@@ -572,5 +596,6 @@
     normalizeCloudflareTempEmailDomains,
     normalizeCloudflareTempEmailMailApiMessages,
     normalizeCloudflareTempEmailMessage,
+    normalizeCloudflareTempEmailSubdomainPrefix,
   };
 });

docs/使用教程/使用教程.md

@@ -22,7 +22,7 @@
 |---|---|---|---|
 | 01 | 相关项目地址与部署说明 | `cpa`、`sub2api`、项目地址、部署前提、部署环境 | `docs/使用教程/分部分/01-相关项目地址与部署说明.md` |
 | 02 | 更新扩展 | `git pull`、`GitHub Desktop`、手动覆盖更新、扩展重新加载 | `docs/使用教程/分部分/02-更新扩展.md` |
-| 03 | Cloudflare Temp Email 使用说明 | `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、邮件接收 | `docs/使用教程/分部分/03-Cloudflare-Temp-Email-使用说明.md` |
+| 03 | Cloudflare Temp Email 使用说明 | `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、固定子域、邮件接收 | `docs/使用教程/分部分/03-Cloudflare-Temp-Email-使用说明.md` |
 | 04 | iCloud 隐私邮箱使用方法 | `iCloud+`、`隐藏邮件地址`、Apple ID、转发邮箱、刷新隐私邮箱 | `docs/使用教程/分部分/04-iCloud-隐私邮箱使用方法.md` |
 | 05 | QQ 邮箱切换邮箱使用教程 | `QQ 邮箱`、英文邮箱、`Foxmail`、删除后重建 | `docs/使用教程/分部分/05-QQ-邮箱切换邮箱使用教程.md` |
 | 06 | PayPal 注册与绑卡使用教程 | `PayPal`、注册、绑卡、钱包、身份认证、右上角通知 | `docs/使用教程/分部分/06-PayPal-注册与绑卡使用教程.md` |

docs/使用教程/使用教程书写模板.md

@@ -72,7 +72,7 @@ AI 维护时默认按下面的范围归类：
 |---|---|---|---|
 | 01 | 相关项目地址与部署说明 | `cpa`、`sub2api`、项目地址、部署前提、部署环境 | `docs/使用教程/分部分/01-相关项目地址与部署说明.md` |
 | 02 | 更新扩展 | `git pull`、`GitHub Desktop`、手动覆盖更新、扩展重新加载 | `docs/使用教程/分部分/02-更新扩展.md` |
-| 03 | Cloudflare Temp Email 使用说明 | `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、邮件接收 | `docs/使用教程/分部分/03-Cloudflare-Temp-Email-使用说明.md` |
+| 03 | Cloudflare Temp Email 使用说明 | `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、固定子域、邮件接收 | `docs/使用教程/分部分/03-Cloudflare-Temp-Email-使用说明.md` |
 | 04 | iCloud 隐私邮箱使用方法 | `iCloud+`、`隐藏邮件地址`、Apple ID、转发邮箱、刷新隐私邮箱 | `docs/使用教程/分部分/04-iCloud-隐私邮箱使用方法.md` |
 | 05 | QQ 邮箱切换邮箱使用教程 | `QQ 邮箱`、英文邮箱、`Foxmail`、删除后重建 | `docs/使用教程/分部分/05-QQ-邮箱切换邮箱使用教程.md` |
 | 06 | PayPal 注册与绑卡使用教程 | `PayPal`、注册、绑卡、钱包、身份认证、右上角通知 | `docs/使用教程/分部分/06-PayPal-注册与绑卡使用教程.md` |

docs/使用教程/分部分/03-Cloudflare-Temp-Email-使用说明.md

@@ -3,7 +3,7 @@
 ## 部分信息
 
 - `section_slug`: `cloudflare-temp-email`
-- `适用主题`: `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、邮件接收
+- `适用主题`: `Cloudflare Temp Email`、`Admin Auth`、`Custom Auth`、随机子域、固定子域、邮件接收
 - `维护方式`: `直接更新本文件`
 
 ## 适用场景
@@ -16,6 +16,7 @@
 
 - 一个可用的 `Cloudflare Temp Email` 后端地址
 - 如果要使用随机子域，对应域名解析已经提前配置好
+- 如果要使用固定子域，后端已经开启 `ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH`
 - 后端的 `admin auth`
 - 如果站点额外设置了访问密码，对应的访问认证信息
 - 一个真正用于接收转发邮件的收件邮箱
@@ -52,23 +53,39 @@
 
 ### 第五步：配置 `Temp 域名`
 
-这里填写允许创建邮箱的基础域名。
-即使你开启了 `随机子域`，这里仍然填写基础域名，而不是随机出来的子域名。
+这里选择允许创建邮箱的基础域名。
+即使你开启了 `随机子域` 或 `固定子域`，这里仍然选择基础域名，而不是最终子域名。
 
 ### 第六步：按需开启 `随机子域`
 
 只有在 `邮箱生成 = Cloudflare Temp Email` 时，这一项才会生效。
+`随机子域` 与 `固定子域` 互斥，只能开启其中一个。
 启用前需要先确认：
 
 - 后端已经配置 `RANDOM_SUBDOMAIN_DOMAINS`
 - Cloudflare DNS 已经设置 `MX *`
 
-### 第七步：作为 `邮箱服务` 时填写 `邮件接收`
+### 第七步：按需开启 `固定子域`
+
+只有在 `邮箱生成 = Cloudflare Temp Email` 时，这一项才会生效。
+开启 `固定子域` 后再填写 `子域前缀`，例如：
+
+- `子域前缀 = a`
+- `Temp 域名 = b.com`
+- 最终提交给后端的域名是 `a.b.com`
+
+切换 `Temp 域名` 后，子域前缀会继续复用。例如选择 `c.com` 后会生成 `xxx@a.c.com`。
+启用前需要先确认：
+
+- 后端已经开启 `ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH`
+- 目标子域名的邮件解析已经准备好，或通配 MX 可以覆盖该子域
+
+### 第八步：作为 `邮箱服务` 时填写 `邮件接收`
 
 如果 `邮箱服务` 也选了 `Cloudflare Temp Email`，还需要填写真正的收件邮箱。
 后续转发邮件会送到这里。
 
-### 第八步：查看后端搭建参考
+### 第九步：查看后端搭建参考
 
 如果你还没有部署后端，可以参考：
 
@@ -88,8 +105,14 @@
 
 通常是因为后端没有配置 `RANDOM_SUBDOMAIN_DOMAINS`，或者 Cloudflare DNS 没有完成 `MX *` 设置。
 
+### 为什么固定子域没有生效？
+
+通常是因为后端没有开启 `ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH`，或者 `子域前缀` 不符合单段 DNS label 规则。
+前缀只能使用小写字母、数字和中横线，不能包含点号、下划线，也不能以中横线开头或结尾。
+
 ## 注意事项
 
 - 如果同时把它用作 `邮箱生成` 和 `邮箱服务`，要把两边相关字段都检查一遍
 - `Custom Auth` 只有额外访问密码场景才需要填写
-- 开启随机子域前，先确认后端和 DNS 已经准备好
+- `随机子域` 与 `固定子域` 互斥，开启固定子域时会自动关闭随机子域
+- 开启随机子域或固定子域前，先确认后端和 DNS 已经准备好

sidepanel/sidepanel.css

@@ -1378,6 +1378,10 @@ header {
 }
 .data-input::placeholder { color: var(--text-muted); }
 .data-input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
+.data-input.is-invalid {
+  border-color: var(--red);
+  box-shadow: 0 0 0 3px var(--red-soft);
+}
 
 .data-textarea {
   width: 100%;
@@ -1490,6 +1494,38 @@ header {
   color: var(--text-muted);
 }
 
+.temp-email-subdomain-mode-wrap,
+.temp-email-subdomain-prefix-wrap {
+  align-items: flex-start;
+  flex-direction: column;
+}
+
+.temp-email-subdomain-mode-wrap .choice-group,
+.temp-email-subdomain-prefix-wrap .data-input {
+  width: 100%;
+}
+
+.temp-email-subdomain-mode-wrap .setting-caption {
+  white-space: normal;
+  text-align: left;
+}
+
+.field-feedback {
+  min-height: 15px;
+  font-size: 12px;
+  font-weight: 600;
+  line-height: 1.25;
+  color: var(--text-muted);
+}
+
+.field-feedback.is-error {
+  color: var(--red);
+}
+
+.field-feedback-muted {
+  color: var(--text-secondary);
+}
+
 #btn-fetch-email,
 #btn-save-settings {
   padding-inline: 10px;

sidepanel/sidepanel.html

@@ -812,22 +812,34 @@
         <input type="text" id="input-temp-email-receive-mailbox" class="data-input"
           placeholder="用于接收转发邮件的邮箱，例如 1@email.example.com" />
       </div>
-      <div class="data-row" id="row-temp-email-random-subdomain-toggle" style="display:none;">
-        <span class="data-label">随机子域</span>
-        <div class="data-inline">
-          <label class="toggle-switch" for="input-temp-email-use-random-subdomain"
-            title="依赖后端 RANDOM_SUBDOMAIN_DOMAINS 配置">
-            <input type="checkbox" id="input-temp-email-use-random-subdomain" />
-            <span class="toggle-switch-track" aria-hidden="true">
-              <span class="toggle-switch-thumb"></span>
-            </span>
-            <span>启用</span>
-          </label>
-          <span class="setting-caption">依赖后端 RANDOM_SUBDOMAIN_DOMAINS</span>
+      <div class="data-row" id="row-temp-email-subdomain-mode" style="display:none;">
+        <span class="data-label">子域模式</span>
+        <div class="data-inline temp-email-subdomain-mode-wrap">
+          <input type="checkbox" id="input-temp-email-use-random-subdomain" hidden />
+          <input type="checkbox" id="input-temp-email-use-fixed-subdomain" hidden />
+          <div id="temp-email-subdomain-mode-group" class="choice-group" role="group"
+            aria-label="Cloudflare Temp Email 子域模式">
+            <button type="button" class="choice-btn" data-temp-email-subdomain-mode="none">不使用</button>
+            <button type="button" class="choice-btn" data-temp-email-subdomain-mode="random"
+              title="依赖后端 RANDOM_SUBDOMAIN_DOMAINS 配置">随机</button>
+            <button type="button" class="choice-btn" data-temp-email-subdomain-mode="fixed"
+              title="依赖后端 ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH 配置">固定</button>
+          </div>
+          <span id="temp-email-subdomain-mode-caption" class="setting-caption setting-caption-left">按基础域名直接生成</span>
+        </div>
+      </div>
+      <div class="data-row" id="row-temp-email-fixed-subdomain-prefix" style="display:none;">
+        <span class="data-label">子域前缀</span>
+        <div class="data-inline temp-email-subdomain-prefix-wrap">
+          <input type="text" id="input-temp-email-subdomain-prefix" class="data-input"
+            placeholder="例如 team；基础域名为 mail.example.com 时生成 xxx@team.mail.example.com"
+            aria-describedby="temp-email-subdomain-prefix-feedback temp-email-effective-domain-preview" />
+          <span id="temp-email-subdomain-prefix-feedback" class="field-feedback" aria-live="polite"></span>
+          <span id="temp-email-effective-domain-preview" class="field-feedback field-feedback-muted"></span>
         </div>
       </div>
       <div class="data-row" id="row-temp-email-domain" style="display:none;">
-        <span class="data-label">Temp 域名</span>
+        <span class="data-label" id="label-temp-email-domain">Temp 域名</span>
         <div class="data-inline">
           <input type="hidden" id="select-temp-email-domain" value="" />
           <div id="temp-email-domain-picker" class="editable-list-picker">

sidepanel/sidepanel.js

@@ -297,9 +297,17 @@ const rowTempEmailLookupMode = document.getElementById('row-temp-email-lookup-mo
 const tempEmailLookupModeButtons = Array.from(document.querySelectorAll('[data-temp-email-lookup-mode]'));
 const rowTempEmailReceiveMailbox = document.getElementById('row-temp-email-receive-mailbox');
 const inputTempEmailReceiveMailbox = document.getElementById('input-temp-email-receive-mailbox');
-const rowTempEmailRandomSubdomainToggle = document.getElementById('row-temp-email-random-subdomain-toggle');
+const rowTempEmailSubdomainMode = document.getElementById('row-temp-email-subdomain-mode');
+const tempEmailSubdomainModeButtons = Array.from(document.querySelectorAll('[data-temp-email-subdomain-mode]'));
+const tempEmailSubdomainModeCaption = document.getElementById('temp-email-subdomain-mode-caption');
 const inputTempEmailUseRandomSubdomain = document.getElementById('input-temp-email-use-random-subdomain');
+const inputTempEmailUseFixedSubdomain = document.getElementById('input-temp-email-use-fixed-subdomain');
+const rowTempEmailFixedSubdomainPrefix = document.getElementById('row-temp-email-fixed-subdomain-prefix');
+const inputTempEmailSubdomainPrefix = document.getElementById('input-temp-email-subdomain-prefix');
+const tempEmailSubdomainPrefixFeedback = document.getElementById('temp-email-subdomain-prefix-feedback');
+const tempEmailEffectiveDomainPreview = document.getElementById('temp-email-effective-domain-preview');
 const rowTempEmailDomain = document.getElementById('row-temp-email-domain');
+const labelTempEmailDomain = document.getElementById('label-temp-email-domain');
 const selectTempEmailDomain = document.getElementById('select-temp-email-domain');
 const tempEmailDomainPickerRoot = document.getElementById('temp-email-domain-picker');
 const btnTempEmailDomainMenu = document.getElementById('btn-temp-email-domain-menu');
@@ -825,6 +833,10 @@ const DEFAULT_MAIL_2925_MODE = MAIL_2925_MODE_PROVIDE;
 const CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE_RECEIVE_MAILBOX = 'receive-mailbox';
 const CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE_REGISTRATION_EMAIL = 'registration-email';
 const DEFAULT_CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE = CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE_RECEIVE_MAILBOX;
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE = 'none';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
+const DEFAULT_CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE = CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE;
 const NEW_USER_GUIDE_PROMPT_DISMISSED_STORAGE_KEY = 'multipage-new-user-guide-prompt-dismissed';
 const AUTO_SKIP_FAILURES_PROMPT_DISMISSED_STORAGE_KEY = 'multipage-auto-skip-failures-prompt-dismissed';
 const AUTO_RUN_FALLBACK_RISK_PROMPT_DISMISSED_STORAGE_KEY = 'multipage-auto-run-fallback-risk-prompt-dismissed';
@@ -4092,6 +4104,54 @@ function normalizeCloudflareTempEmailDomainValue(value = '') {
   return normalizeCloudflareDomainValue(value);
 }
 
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value = '') {
+  let normalized = String(value || '').trim().toLowerCase();
+  if (!normalized) return '';
+  normalized = normalized.replace(/^@+/, '');
+  normalized = normalized.replace(/^https?:\/\//, '');
+  normalized = normalized.replace(/\/.*$/, '');
+  normalized = normalized.replace(/^\.+|\.+$/g, '');
+  if (!/^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/.test(normalized)) {
+    return '';
+  }
+  return normalized;
+}
+
+function buildCloudflareTempEmailEffectiveDomainValue(domain = '', subdomainPrefix = '', options = {}) {
+  const normalizedDomain = normalizeCloudflareTempEmailDomainValue(domain);
+  if (!normalizedDomain) return '';
+  const normalizedPrefix = normalizeCloudflareTempEmailSubdomainPrefixValue(subdomainPrefix);
+  if (options.requirePrefix && !normalizedPrefix) return '';
+  return normalizedPrefix ? `${normalizedPrefix}.${normalizedDomain}` : normalizedDomain;
+}
+
+function getCloudflareTempEmailSubdomainPrefixValidation(value = '') {
+  const raw = String(value || '').trim();
+  if (!raw) {
+    return {
+      raw,
+      normalized: '',
+      valid: false,
+      message: '请填写子域前缀',
+    };
+  }
+  const normalized = normalizeCloudflareTempEmailSubdomainPrefixValue(raw);
+  if (!normalized) {
+    return {
+      raw,
+      normalized: '',
+      valid: false,
+      message: '仅支持 1-63 位字母、数字或中划线，且不能以中划线开头或结尾',
+    };
+  }
+  return {
+    raw,
+    normalized,
+    valid: true,
+    message: '',
+  };
+}
+
 function normalizeCloudflareTempEmailDomains(values = []) {
   const seen = new Set();
   const domains = [];
@@ -4181,8 +4241,17 @@ function applyCloudflareTempEmailSettingsState(state = {}) {
   inputTempEmailCustomAuth.value = state?.cloudflareTempEmailCustomAuth || '';
   inputTempEmailReceiveMailbox.value = state?.cloudflareTempEmailReceiveMailbox || '';
   setCloudflareTempEmailLookupMode(state?.cloudflareTempEmailLookupMode);
-  if (inputTempEmailUseRandomSubdomain) {
-    inputTempEmailUseRandomSubdomain.checked = Boolean(state?.cloudflareTempEmailUseRandomSubdomain);
+  setCloudflareTempEmailSubdomainMode(
+    state?.cloudflareTempEmailUseFixedSubdomain
+      ? CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED
+      : (state?.cloudflareTempEmailUseRandomSubdomain
+        ? CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM
+        : CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE)
+  );
+  if (inputTempEmailSubdomainPrefix) {
+    inputTempEmailSubdomainPrefix.value = normalizeCloudflareTempEmailSubdomainPrefixValue(
+      state?.cloudflareTempEmailSubdomainPrefix || ''
+    );
   }
   renderCloudflareTempEmailDomainOptions(state?.cloudflareTempEmailDomain || '');
   setCloudflareTempEmailDomainEditMode(false, { clearInput: true });
@@ -4233,6 +4302,7 @@ function collectSettingsPayload() {
   const selectedCloudflareTempEmailDomain = normalizeCloudflareTempEmailDomainValue(
     !cloudflareTempEmailDomainEditMode ? selectTempEmailDomain.value : tempEmailActiveDomain
   ) || tempEmailActiveDomain;
+  const cloudflareTempEmailSubdomainMode = getSelectedCloudflareTempEmailSubdomainMode();
   const normalizeCloudMailBaseUrlInput = typeof normalizeCloudMailBaseUrlValue === 'function'
     ? normalizeCloudMailBaseUrlValue
     : normalizeCloudflareTempEmailBaseUrlValue;
@@ -5128,7 +5198,13 @@ function collectSettingsPayload() {
       ? getSelectedCloudflareTempEmailLookupMode()
       : 'receive-mailbox',
     cloudflareTempEmailReceiveMailbox: normalizeCloudflareTempEmailReceiveMailboxValue(inputTempEmailReceiveMailbox.value),
-    cloudflareTempEmailUseRandomSubdomain: Boolean(inputTempEmailUseRandomSubdomain?.checked),
+    cloudflareTempEmailUseRandomSubdomain: cloudflareTempEmailSubdomainMode
+      === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM,
+    cloudflareTempEmailUseFixedSubdomain: cloudflareTempEmailSubdomainMode
+      === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED,
+    cloudflareTempEmailSubdomainPrefix: normalizeCloudflareTempEmailSubdomainPrefixValue(
+      inputTempEmailSubdomainPrefix?.value || ''
+    ),
     cloudflareTempEmailDomain: selectedCloudflareTempEmailDomain,
     cloudflareTempEmailDomains: tempEmailDomains,
     cloudMailBaseUrl: normalizeCloudMailBaseUrlInput((typeof inputCloudMailBaseUrl !== 'undefined' && inputCloudMailBaseUrl) ? inputCloudMailBaseUrl.value : ''),
@@ -5209,6 +5285,17 @@ function normalizeCloudflareTempEmailLookupMode(value = '') {
     : DEFAULT_CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE;
 }
 
+function normalizeCloudflareTempEmailSubdomainMode(value = '') {
+  const normalized = String(value || '').trim().toLowerCase();
+  if (normalized === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM) {
+    return CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM;
+  }
+  if (normalized === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED) {
+    return CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED;
+  }
+  return DEFAULT_CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE;
+}
+
 function normalizeHotmailServiceMode(value = '') {
   if (typeof normalizeHotmailServiceModeFromUtils === 'function') {
     return normalizeHotmailServiceModeFromUtils(value);
@@ -8842,6 +8929,37 @@ function setCloudflareTempEmailLookupMode(mode) {
   });
 }
 
+function syncCloudflareTempEmailSubdomainModeButtons(mode) {
+  const resolvedMode = normalizeCloudflareTempEmailSubdomainMode(mode);
+  tempEmailSubdomainModeButtons.forEach((button) => {
+    const active = button.dataset.tempEmailSubdomainMode === resolvedMode;
+    button.classList.toggle('is-active', active);
+    button.setAttribute('aria-pressed', String(active));
+  });
+}
+
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain?.checked) {
+    return CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED;
+  }
+  if (inputTempEmailUseRandomSubdomain?.checked) {
+    return CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM;
+  }
+  const activeButton = tempEmailSubdomainModeButtons.find((button) => button.classList.contains('is-active'));
+  return normalizeCloudflareTempEmailSubdomainMode(activeButton?.dataset.tempEmailSubdomainMode);
+}
+
+function setCloudflareTempEmailSubdomainMode(mode) {
+  const resolvedMode = normalizeCloudflareTempEmailSubdomainMode(mode);
+  if (inputTempEmailUseRandomSubdomain) {
+    inputTempEmailUseRandomSubdomain.checked = resolvedMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM;
+  }
+  if (inputTempEmailUseFixedSubdomain) {
+    inputTempEmailUseFixedSubdomain.checked = resolvedMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED;
+  }
+  syncCloudflareTempEmailSubdomainModeButtons(resolvedMode);
+}
+
 function getSelectedHotmailServiceMode() {
   const activeButton = hotmailServiceModeButtons.find((button) => button.classList.contains('is-active'));
   return normalizeHotmailServiceMode(activeButton?.dataset.hotmailServiceMode);
@@ -12958,8 +13076,26 @@ function updateMailProviderUI() {
   const isIcloudComCnHost = selectedIcloudHost === 'icloud.com.cn';
   const showIcloudTargetMailboxType = useIcloudProvider;
   const showIcloudForwardMailProvider = useIcloudProvider && icloudTargetMailboxType === 'forward-mailbox';
-  const showCloudflareTempEmailRandomSubdomainToggle = useEmailGenerator && useCloudflareTempEmailGenerator;
+  const showCloudflareTempEmailSubdomainMode = useEmailGenerator && useCloudflareTempEmailGenerator;
+  const cloudflareTempEmailSubdomainMode = getSelectedCloudflareTempEmailSubdomainMode();
+  syncCloudflareTempEmailSubdomainModeButtons(cloudflareTempEmailSubdomainMode);
+  const showCloudflareTempEmailFixedSubdomainPrefix = showCloudflareTempEmailSubdomainMode
+    && cloudflareTempEmailSubdomainMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED;
   const showCloudflareTempEmailDomain = useEmailGenerator && useCloudflareTempEmailGenerator;
+  const { domains: tempEmailDomains, activeDomain: tempEmailActiveDomain } = getCloudflareTempEmailDomainsFromState();
+  const selectedTempEmailDomain = normalizeCloudflareTempEmailDomainValue(
+    selectTempEmailDomain?.value || tempEmailActiveDomain
+  ) || tempEmailActiveDomain;
+  const fixedSubdomainValidation = getCloudflareTempEmailSubdomainPrefixValidation(
+    inputTempEmailSubdomainPrefix?.value || ''
+  );
+  const fixedSubdomainConfigInvalid = showCloudflareTempEmailFixedSubdomainPrefix
+    && !fixedSubdomainValidation.valid;
+  const tempEmailEffectiveDomain = buildCloudflareTempEmailEffectiveDomainValue(
+    selectedTempEmailDomain,
+    fixedSubdomainValidation.normalized,
+    { requirePrefix: true }
+  );
   if (rowEmailGenerator) {
     rowEmailGenerator.style.display = useEmailGenerator ? '' : 'none';
   }
@@ -13015,11 +13151,38 @@ function updateMailProviderUI() {
     rowTempEmailLookupMode.style.display = showCloudflareTempEmailLookupMode ? '' : 'none';
   }
   rowTempEmailReceiveMailbox.style.display = showCloudflareTempEmailReceiveMailbox ? '' : 'none';
-  if (rowTempEmailRandomSubdomainToggle) {
-    rowTempEmailRandomSubdomainToggle.style.display = showCloudflareTempEmailRandomSubdomainToggle ? '' : 'none';
+  if (rowTempEmailSubdomainMode) {
+    rowTempEmailSubdomainMode.style.display = showCloudflareTempEmailSubdomainMode ? '' : 'none';
+  }
+  if (tempEmailSubdomainModeCaption) {
+    tempEmailSubdomainModeCaption.textContent = cloudflareTempEmailSubdomainMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM
+      ? '需后端、DNS、Email Routing/MX 覆盖随机子域'
+      : (cloudflareTempEmailSubdomainMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED
+        ? '需后端、DNS、Email Routing/MX 覆盖固定子域'
+        : '按基础域名直接生成');
+  }
+  if (rowTempEmailFixedSubdomainPrefix) {
+    rowTempEmailFixedSubdomainPrefix.style.display = showCloudflareTempEmailFixedSubdomainPrefix ? '' : 'none';
+  }
+  if (inputTempEmailSubdomainPrefix) {
+    inputTempEmailSubdomainPrefix.classList.toggle('is-invalid', fixedSubdomainConfigInvalid);
+    inputTempEmailSubdomainPrefix.setAttribute('aria-invalid', String(fixedSubdomainConfigInvalid));
+  }
+  if (tempEmailSubdomainPrefixFeedback) {
+    tempEmailSubdomainPrefixFeedback.textContent = fixedSubdomainConfigInvalid
+      ? fixedSubdomainValidation.message
+      : '';
+    tempEmailSubdomainPrefixFeedback.classList.toggle('is-error', fixedSubdomainConfigInvalid);
+  }
+  if (tempEmailEffectiveDomainPreview) {
+    tempEmailEffectiveDomainPreview.textContent = showCloudflareTempEmailFixedSubdomainPrefix && tempEmailEffectiveDomain
+      ? `最终域名：${tempEmailEffectiveDomain}`
+      : '';
   }
   rowTempEmailDomain.style.display = showCloudflareTempEmailDomain ? '' : 'none';
-  const { domains: tempEmailDomains } = getCloudflareTempEmailDomainsFromState();
+  if (labelTempEmailDomain) {
+    labelTempEmailDomain.textContent = showCloudflareTempEmailFixedSubdomainPrefix ? '基础域名' : 'Temp 域名';
+  }
   if (showCloudflareTempEmailDomain) {
     setCloudflareTempEmailDomainEditMode(cloudflareTempEmailDomainEditMode || tempEmailDomains.length === 0, { clearInput: false });
   } else {
@@ -13079,7 +13242,7 @@ function updateMailProviderUI() {
   if (useCustomEmail && useCustomMailProviderPool) {
     inputEmail.placeholder = '号池会按顺序自动回填当前轮邮箱，也可以手动覆盖';
   }
-  btnFetchEmail.disabled = useLuckmail || useCustomEmail || useCustomEmailPool || isAutoRunLockedPhase();
+  btnFetchEmail.disabled = useLuckmail || useCustomEmail || useCustomEmailPool || fixedSubdomainConfigInvalid || isAutoRunLockedPhase();
   if (!btnFetchEmail.disabled) {
     btnFetchEmail.textContent = uiCopy.buttonLabel;
   }
@@ -13116,8 +13279,17 @@ function updateMailProviderUI() {
   if (autoHintText && showCloudflareTempEmailReceiveMailbox && !useCustomEmailPool) {
     autoHintText.textContent = '若注册邮箱会转发到 Cloudflare Temp Email，请在“邮件接收”中填写实际接收转发邮件的邮箱。';
   }
-  if (autoHintText && showCloudflareTempEmailRandomSubdomainToggle && inputTempEmailUseRandomSubdomain?.checked) {
-    autoHintText.textContent = '已启用随机子域名：扩展会按当前选中的 Temp 域名提交，并额外携带 enableRandomSubdomain；是否生效取决于后端 RANDOM_SUBDOMAIN_DOMAINS 配置。';
+  if (
+    autoHintText
+    && showCloudflareTempEmailSubdomainMode
+    && cloudflareTempEmailSubdomainMode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM
+  ) {
+    autoHintText.textContent = '已启用随机子域名：扩展会按当前选中的基础域名提交，并额外携带 enableRandomSubdomain；后端 RANDOM_SUBDOMAIN_DOMAINS、DNS、Email Routing/MX 都需要覆盖对应子域。';
+  }
+  if (autoHintText && showCloudflareTempEmailFixedSubdomainPrefix) {
+    autoHintText.textContent = tempEmailEffectiveDomain
+      ? `已启用固定子域名：本次会向后端提交 ${tempEmailEffectiveDomain}；后端 ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH、DNS、Email Routing/MX 都需要覆盖该子域。`
+      : `已启用固定子域名：${fixedSubdomainValidation.message}；后端、DNS、Email Routing/MX 都需要覆盖该子域。`;
   }
   if (autoHintText && useIcloudProvider && showIcloudForwardMailProvider) {
     const forwardProvider = normalizeIcloudForwardMailProvider(icloudForwardMailProviderValue);
@@ -16507,10 +16679,30 @@ inputTempEmailReceiveMailbox.addEventListener('blur', () => {
   saveSettings({ silent: true }).catch(() => { });
 });
 
-inputTempEmailUseRandomSubdomain?.addEventListener('change', () => {
+tempEmailSubdomainModeButtons.forEach((button) => {
+  button.addEventListener('click', () => {
+    const nextMode = normalizeCloudflareTempEmailSubdomainMode(button.dataset.tempEmailSubdomainMode);
+    const previousMode = getSelectedCloudflareTempEmailSubdomainMode();
+    if (nextMode === previousMode) {
+      return;
+    }
+    setCloudflareTempEmailSubdomainMode(nextMode);
+    updateMailProviderUI();
+    clearRegistrationEmail({ silent: true }).catch(() => { });
+    markSettingsDirty(true);
+    saveSettings({ silent: true }).catch(() => { });
+  });
+});
+
+inputTempEmailSubdomainPrefix?.addEventListener('input', () => {
   updateMailProviderUI();
   clearRegistrationEmail({ silent: true }).catch(() => { });
   markSettingsDirty(true);
+  scheduleSettingsAutoSave();
+});
+inputTempEmailSubdomainPrefix?.addEventListener('blur', () => {
+  inputTempEmailSubdomainPrefix.value = normalizeCloudflareTempEmailSubdomainPrefixValue(inputTempEmailSubdomainPrefix.value);
+  updateMailProviderUI();
   saveSettings({ silent: true }).catch(() => { });
 });
 
@@ -17688,14 +17880,38 @@ chrome.runtime.onMessage.addListener((message, _sender, sendResponse) => {
       if (message.payload.cloudflareTempEmailReceiveMailbox !== undefined) {
         inputTempEmailReceiveMailbox.value = message.payload.cloudflareTempEmailReceiveMailbox || '';
       }
-      if (message.payload.cloudflareTempEmailUseRandomSubdomain !== undefined && inputTempEmailUseRandomSubdomain) {
-        inputTempEmailUseRandomSubdomain.checked = Boolean(message.payload.cloudflareTempEmailUseRandomSubdomain);
+      if (
+        message.payload.cloudflareTempEmailUseRandomSubdomain !== undefined
+        || message.payload.cloudflareTempEmailUseFixedSubdomain !== undefined
+      ) {
+        const useFixedSubdomain = Boolean(
+          message.payload.cloudflareTempEmailUseFixedSubdomain
+          ?? latestState?.cloudflareTempEmailUseFixedSubdomain
+        );
+        const useRandomSubdomain = Boolean(
+          message.payload.cloudflareTempEmailUseRandomSubdomain
+          ?? latestState?.cloudflareTempEmailUseRandomSubdomain
+        );
+        setCloudflareTempEmailSubdomainMode(
+          useFixedSubdomain
+            ? CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED
+            : (useRandomSubdomain
+              ? CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM
+              : CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE)
+        );
+      }
+      if (message.payload.cloudflareTempEmailSubdomainPrefix !== undefined && inputTempEmailSubdomainPrefix) {
+        inputTempEmailSubdomainPrefix.value = normalizeCloudflareTempEmailSubdomainPrefixValue(
+          message.payload.cloudflareTempEmailSubdomainPrefix || ''
+        );
       }
       if (message.payload.cloudflareTempEmailDomain !== undefined || message.payload.cloudflareTempEmailDomains !== undefined) {
         renderCloudflareTempEmailDomainOptions(message.payload.cloudflareTempEmailDomain || latestState?.cloudflareTempEmailDomain || '');
       }
       if (
         message.payload.cloudflareTempEmailUseRandomSubdomain !== undefined
+        || message.payload.cloudflareTempEmailUseFixedSubdomain !== undefined
+        || message.payload.cloudflareTempEmailSubdomainPrefix !== undefined
         || message.payload.cloudflareTempEmailLookupMode !== undefined
         || message.payload.cloudflareTempEmailDomain !== undefined
         || message.payload.cloudflareTempEmailDomains !== undefined
@@ -18300,6 +18516,7 @@ updateConfigMenuControls();
 setLocalCpaStep9Mode(DEFAULT_LOCAL_CPA_STEP9_MODE);
 setMail2925Mode(DEFAULT_MAIL_2925_MODE);
 setCloudflareTempEmailLookupMode(DEFAULT_CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE);
+setCloudflareTempEmailSubdomainMode(DEFAULT_CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE);
 initializeReleaseInfo().catch((err) => {
   console.error('Failed to initialize release info:', err);
 });

tests/background-cloudflare-temp-email-settings.test.js

@@ -73,6 +73,8 @@ const PERSISTED_SETTING_DEFAULTS = {
   accountRunHistoryTextEnabled: false,
   cloudflareTempEmailLookupMode: 'receive-mailbox',
   cloudflareTempEmailUseRandomSubdomain: false,
+  cloudflareTempEmailUseFixedSubdomain: false,
+  cloudflareTempEmailSubdomainPrefix: '',
   cloudflareTempEmailDomain: '',
   cloudflareTempEmailDomains: [],
 };
@@ -97,6 +99,16 @@ function normalizeCloudflareDomains(value) { return Array.isArray(value) ? value
 function normalizeCloudflareTempEmailBaseUrl(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailAddress(value = '') { return String(value || '').trim().toLowerCase(); }
 function normalizeCloudflareTempEmailDomain(value) { return String(value || '').trim().toLowerCase(); }
+function normalizeCloudflareTempEmailSubdomainPrefix(value) {
+  const normalized = String(value || '').trim().toLowerCase();
+  return /^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/.test(normalized) ? normalized : '';
+}
+function buildCloudflareTempEmailEffectiveDomain(config = {}) {
+  const domain = normalizeCloudflareTempEmailDomain(config.domain);
+  const prefix = normalizeCloudflareTempEmailSubdomainPrefix(config.subdomainPrefix);
+  if (!domain) return '';
+  return config.useFixedSubdomain ? (prefix ? \`\${prefix}.\${domain}\` : '') : domain;
+}
 function normalizeCloudflareTempEmailDomains(value) {
   const seen = new Set();
   const domains = [];
@@ -120,17 +132,24 @@ return {
   `)();
 
   assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailUseRandomSubdomain', 1), true);
+  assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailUseFixedSubdomain', 1), true);
+  assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailSubdomainPrefix', 'Team-1'), 'team-1');
+  assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailSubdomainPrefix', 'team.one'), '');
   assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailLookupMode', 'registration-email'), 'registration-email');
   assert.equal(api.normalizePersistentSettingValue('cloudflareTempEmailLookupMode', 'bad'), 'receive-mailbox');
 
   const payload = api.buildPersistentSettingsPayload({
     cloudflareTempEmailLookupMode: 'registration-email',
     cloudflareTempEmailUseRandomSubdomain: true,
+    cloudflareTempEmailUseFixedSubdomain: true,
+    cloudflareTempEmailSubdomainPrefix: 'Team',
     cloudflareTempEmailDomain: 'mail.example.com',
     cloudflareTempEmailDomains: ['mail.example.com', 'alt.example.com'],
   });
   assert.equal(payload.cloudflareTempEmailLookupMode, 'registration-email');
-  assert.equal(payload.cloudflareTempEmailUseRandomSubdomain, true);
+  assert.equal(payload.cloudflareTempEmailUseRandomSubdomain, false);
+  assert.equal(payload.cloudflareTempEmailUseFixedSubdomain, true);
+  assert.equal(payload.cloudflareTempEmailSubdomainPrefix, 'team');
   assert.equal(payload.cloudflareTempEmailDomain, 'mail.example.com');
   assert.deepEqual(payload.cloudflareTempEmailDomains, ['mail.example.com', 'alt.example.com']);
 
@@ -141,6 +160,8 @@ return {
     cloudflareTempEmailLookupMode: 'registration-email',
     cloudflareTempEmailReceiveMailbox: 'Forward@Example.com',
     cloudflareTempEmailUseRandomSubdomain: true,
+    cloudflareTempEmailUseFixedSubdomain: true,
+    cloudflareTempEmailSubdomainPrefix: 'Team',
     cloudflareTempEmailDomain: 'mail.example.com',
     cloudflareTempEmailDomains: ['mail.example.com'],
   });
@@ -150,9 +171,12 @@ return {
     customAuth: 'custom-secret',
     lookupMode: 'registration-email',
     receiveMailbox: 'forward@example.com',
-    useRandomSubdomain: true,
+    useRandomSubdomain: false,
+    useFixedSubdomain: true,
+    subdomainPrefix: 'team',
     domain: 'mail.example.com',
     domains: ['mail.example.com'],
+    effectiveDomain: 'team.mail.example.com',
   });
 });
 
@@ -169,6 +193,8 @@ const PERSISTED_SETTING_DEFAULTS = {
   autoDeleteUsedIcloudAlias: false,
   accountRunHistoryTextEnabled: false,
   cloudflareTempEmailUseRandomSubdomain: false,
+  cloudflareTempEmailUseFixedSubdomain: false,
+  cloudflareTempEmailSubdomainPrefix: '',
   cloudflareTempEmailDomain: '',
   cloudflareTempEmailDomains: [],
 };
@@ -200,6 +226,7 @@ function normalizeCloudflareTempEmailBaseUrl(value) { return String(value || '')
 function normalizeCloudflareTempEmailAddress(value = '') { return String(value || '').trim().toLowerCase(); }
 function normalizeCloudflareTempEmailReceiveMailbox(value = '') { return String(value || '').trim().toLowerCase(); }
 function normalizeCloudflareTempEmailDomain(value) { return String(value || '').trim().toLowerCase(); }
+function normalizeCloudflareTempEmailSubdomainPrefix(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeCloudflareTempEmailDomains(value) { return Array.isArray(value) ? value.map((item) => String(item || '').trim().toLowerCase()).filter(Boolean) : []; }
 function normalizeHotmailAccounts(value) { return Array.isArray(value) ? value : []; }
 function normalizeMail2925Accounts(value) { return Array.isArray(value) ? value : []; }

tests/background-generated-email-module.test.js

@@ -561,6 +561,84 @@ test('generated email helper requests random subdomain creation while preserving
   });
 });
 
+test('generated email helper uses fixed subdomain as the effective temp email domain', async () => {
+  const api = loadGeneratedEmailHelpersApi();
+  const requests = [];
+  const savedEmails = [];
+
+  const helpers = api.createGeneratedEmailHelpers({
+    addLog: async () => {},
+    buildGeneratedAliasEmail: () => {
+      throw new Error('should not build managed alias');
+    },
+    buildCloudflareTempEmailEffectiveDomain: (config) => `${config.subdomainPrefix}.${config.domain}`,
+    buildCloudflareTempEmailHeaders: () => ({ 'x-admin-auth': 'admin-secret' }),
+    CLOUDFLARE_TEMP_EMAIL_GENERATOR: 'cloudflare-temp-email',
+    DUCK_AUTOFILL_URL: 'https://duckduckgo.com/email',
+    fetch: async (url, options = {}) => {
+      requests.push({
+        url,
+        method: options.method,
+        body: options.body ? JSON.parse(options.body) : null,
+      });
+      return {
+        ok: true,
+        text: async () => JSON.stringify({ address: 'user@team.mail.example.com' }),
+      };
+    },
+    fetchIcloudHideMyEmail: async () => {
+      throw new Error('should not use icloud generator');
+    },
+    getCloudflareTempEmailAddressFromResponse: (payload) => payload.address,
+    getCloudflareTempEmailConfig: () => ({
+      baseUrl: 'https://temp.example.com',
+      adminAuth: 'admin-secret',
+      customAuth: '',
+      useRandomSubdomain: true,
+      useFixedSubdomain: true,
+      subdomainPrefix: 'team',
+      domain: 'mail.example.com',
+    }),
+    getState: async () => ({
+      mailProvider: '163',
+      emailGenerator: 'cloudflare-temp-email',
+    }),
+    ensureMail2925AccountForFlow: async () => {
+      throw new Error('should not allocate mail2925 account');
+    },
+    joinCloudflareTempEmailUrl: (baseUrl, path) => `${baseUrl}${path}`,
+    normalizeCloudflareDomain: () => '',
+    normalizeCloudflareTempEmailAddress: (value) => String(value || '').trim().toLowerCase(),
+    normalizeEmailGenerator: (value) => String(value || '').trim().toLowerCase(),
+    isGeneratedAliasProvider: () => false,
+    reuseOrCreateTab: async () => {},
+    sendToContentScript: async () => {
+      throw new Error('should not use duck generator');
+    },
+    setEmailState: async (email) => {
+      savedEmails.push(email);
+    },
+    throwIfStopped: () => {},
+  });
+
+  const email = await helpers.fetchGeneratedEmail({
+    emailGenerator: 'cloudflare-temp-email',
+  }, {
+    generator: 'cloudflare-temp-email',
+    localPart: 'user',
+  });
+
+  assert.equal(email, 'user@team.mail.example.com');
+  assert.deepEqual(savedEmails, ['user@team.mail.example.com']);
+  assert.equal(requests.length, 1);
+  assert.deepEqual(requests[0].body, {
+    enablePrefix: true,
+    enableRandomSubdomain: false,
+    name: 'user',
+    domain: 'team.mail.example.com',
+  });
+});
+
 test('generated email helper honors iCloud always-new fetch mode', async () => {
   const api = loadGeneratedEmailHelpersApi();
   const icloudOptions = [];

tests/cloudflare-temp-email-utils.test.js

@@ -2,12 +2,14 @@ const test = require('node:test');
 const assert = require('node:assert/strict');
 
 const {
+  buildCloudflareTempEmailEffectiveDomain,
   buildCloudflareTempEmailHeaders,
   getCloudflareTempEmailAddressFromResponse,
   normalizeCloudflareTempEmailBaseUrl,
   normalizeCloudflareTempEmailDomain,
   normalizeCloudflareTempEmailDomains,
   normalizeCloudflareTempEmailMailApiMessages,
+  normalizeCloudflareTempEmailSubdomainPrefix,
 } = require('../cloudflare-temp-email-utils.js');
 const {
   pickVerificationMessageWithTimeFallback,
@@ -34,6 +36,38 @@ test('normalizeCloudflareTempEmailDomain and domains de-duplicate valid entries'
   );
 });
 
+test('cloudflare temp email fixed subdomain helpers validate one label and build effective domain', () => {
+  assert.equal(normalizeCloudflareTempEmailSubdomainPrefix(' Team-1 '), 'team-1');
+  assert.equal(normalizeCloudflareTempEmailSubdomainPrefix('a.example'), '');
+  assert.equal(normalizeCloudflareTempEmailSubdomainPrefix('-team'), '');
+  assert.equal(normalizeCloudflareTempEmailSubdomainPrefix('team_1'), '');
+
+  assert.equal(
+    buildCloudflareTempEmailEffectiveDomain({
+      domain: 'Mail.Example.com',
+      useFixedSubdomain: true,
+      subdomainPrefix: 'Team',
+    }),
+    'team.mail.example.com'
+  );
+  assert.equal(
+    buildCloudflareTempEmailEffectiveDomain({
+      domain: 'mail.example.com',
+      useFixedSubdomain: false,
+      subdomainPrefix: 'team',
+    }),
+    'mail.example.com'
+  );
+  assert.equal(
+    buildCloudflareTempEmailEffectiveDomain({
+      domain: 'mail.example.com',
+      useFixedSubdomain: true,
+      subdomainPrefix: '',
+    }),
+    ''
+  );
+});
+
 test('buildCloudflareTempEmailHeaders includes auth headers and content type when needed', () => {
   assert.deepEqual(
     buildCloudflareTempEmailHeaders(

tests/sidepanel-cloudflare-temp-email-random-subdomain.test.js

@@ -58,6 +58,31 @@ function createRow(initialDisplay = 'none') {
   };
 }
 
+function createClassList(initial = []) {
+  const values = new Set(initial);
+  return {
+    toggle(name, force) {
+      if (force === undefined) {
+        if (values.has(name)) {
+          values.delete(name);
+          return false;
+        }
+        values.add(name);
+        return true;
+      }
+      if (force) {
+        values.add(name);
+        return true;
+      }
+      values.delete(name);
+      return false;
+    },
+    contains(name) {
+      return values.has(name);
+    },
+  };
+}
+
 test('sidepanel html places cloudflare temp email controls in a standalone section', () => {
   const html = fs.readFileSync('sidepanel/sidepanel.html', 'utf8');
   assert.match(html, /id="cloudflare-temp-email-section"/);
@@ -67,9 +92,20 @@ test('sidepanel html places cloudflare temp email controls in a standalone secti
   assert.match(html, /id="row-temp-email-lookup-mode"/);
   assert.match(html, /data-temp-email-lookup-mode="receive-mailbox"/);
   assert.match(html, /data-temp-email-lookup-mode="registration-email"/);
-  assert.match(html, /id="row-temp-email-random-subdomain-toggle"/);
+  assert.match(html, /id="row-temp-email-subdomain-mode"/);
+  assert.match(html, /data-temp-email-subdomain-mode="none"/);
+  assert.match(html, /data-temp-email-subdomain-mode="random"/);
+  assert.match(html, /data-temp-email-subdomain-mode="fixed"/);
   assert.match(html, /id="input-temp-email-use-random-subdomain"/);
+  assert.match(html, /id="input-temp-email-use-fixed-subdomain"/);
+  assert.match(html, /id="row-temp-email-fixed-subdomain-prefix"/);
+  assert.match(html, /id="input-temp-email-subdomain-prefix"/);
+  assert.match(html, /id="temp-email-subdomain-prefix-feedback"/);
+  assert.match(html, /id="temp-email-effective-domain-preview"/);
+  assert.match(html, /id="label-temp-email-domain"/);
   assert.match(html, /id="btn-temp-email-domain-mode"[^>]*>更新</);
+  assert.doesNotMatch(html, /id="row-temp-email-random-subdomain-toggle"/);
+  assert.doesNotMatch(html, /id="row-temp-email-fixed-subdomain-toggle"/);
   assert.doesNotMatch(html, /id="row-temp-email-random-subdomain-domain"/);
 });
 
@@ -142,6 +178,15 @@ const inputTempEmailAdminAuth = { value: '' };
 const inputTempEmailCustomAuth = { value: '' };
 const inputTempEmailReceiveMailbox = { value: '' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = { value: '' };
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE = 'none';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
+function setCloudflareTempEmailSubdomainMode(mode) {
+  inputTempEmailUseFixedSubdomain.checked = mode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED;
+  inputTempEmailUseRandomSubdomain.checked = mode === CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM;
+}
 const calls = {
   domainOptions: [],
   domainEditMode: [],
@@ -150,6 +195,10 @@ const calls = {
 function renderCloudflareTempEmailDomainOptions(value) { calls.domainOptions.push(value); }
 function setCloudflareTempEmailDomainEditMode(editing, options) { calls.domainEditMode.push({ editing, options }); }
 function setCloudflareTempEmailLookupMode(value) { calls.lookupModes.push(value); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value = '') {
+  const normalized = String(value || '').trim().toLowerCase();
+  return /^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/.test(normalized) ? normalized : '';
+}
 ${bundle}
 return {
   applyCloudflareTempEmailSettingsState,
@@ -159,6 +208,8 @@ return {
   inputTempEmailCustomAuth,
   inputTempEmailReceiveMailbox,
   inputTempEmailUseRandomSubdomain,
+  inputTempEmailUseFixedSubdomain,
+  inputTempEmailSubdomainPrefix,
 };
   `)();
 
@@ -169,6 +220,8 @@ return {
     cloudflareTempEmailLookupMode: 'registration-email',
     cloudflareTempEmailReceiveMailbox: 'relay@example.com',
     cloudflareTempEmailUseRandomSubdomain: true,
+    cloudflareTempEmailUseFixedSubdomain: true,
+    cloudflareTempEmailSubdomainPrefix: 'Team',
     cloudflareTempEmailDomain: 'mail.example.com',
   });
 
@@ -176,7 +229,9 @@ return {
   assert.equal(api.inputTempEmailAdminAuth.value, 'admin-secret');
   assert.equal(api.inputTempEmailCustomAuth.value, 'custom-secret');
   assert.equal(api.inputTempEmailReceiveMailbox.value, 'relay@example.com');
-  assert.equal(api.inputTempEmailUseRandomSubdomain.checked, true);
+  assert.equal(api.inputTempEmailUseRandomSubdomain.checked, false);
+  assert.equal(api.inputTempEmailUseFixedSubdomain.checked, true);
+  assert.equal(api.inputTempEmailSubdomainPrefix.value, 'team');
   assert.deepEqual(api.calls.lookupModes, ['registration-email']);
   assert.deepEqual(api.calls.domainOptions, ['mail.example.com']);
   assert.deepEqual(api.calls.domainEditMode, [{ editing: false, options: { clearInput: true } }]);
@@ -415,8 +470,55 @@ const rowTempEmailAdminAuth = ${JSON.stringify(createRow('none'))};
 const rowTempEmailCustomAuth = ${JSON.stringify(createRow('none'))};
 const rowTempEmailLookupMode = ${JSON.stringify(createRow('none'))};
 const rowTempEmailReceiveMailbox = ${JSON.stringify(createRow('none'))};
-const rowTempEmailRandomSubdomainToggle = ${JSON.stringify(createRow('none'))};
+const rowTempEmailSubdomainMode = ${JSON.stringify(createRow('none'))};
+function createClassList(initial = []) {
+  const values = new Set(initial);
+  return {
+    toggle(name, force) {
+      if (force === undefined) {
+        if (values.has(name)) {
+          values.delete(name);
+          return false;
+        }
+        values.add(name);
+        return true;
+      }
+      if (force) {
+        values.add(name);
+        return true;
+      }
+      values.delete(name);
+      return false;
+    },
+    contains(name) {
+      return values.has(name);
+    },
+  };
+}
+const tempEmailSubdomainModeButtons = [
+  {
+    dataset: { tempEmailSubdomainMode: 'none' },
+    attributes: {},
+    classList: createClassList(['is-active']),
+    setAttribute(name, value) { this.attributes[name] = String(value); },
+  },
+  {
+    dataset: { tempEmailSubdomainMode: 'random' },
+    attributes: {},
+    classList: createClassList(),
+    setAttribute(name, value) { this.attributes[name] = String(value); },
+  },
+  {
+    dataset: { tempEmailSubdomainMode: 'fixed' },
+    attributes: {},
+    classList: createClassList(),
+    setAttribute(name, value) { this.attributes[name] = String(value); },
+  },
+];
+const tempEmailSubdomainModeCaption = { textContent: '' };
+const rowTempEmailFixedSubdomainPrefix = ${JSON.stringify(createRow('none'))};
 const rowTempEmailDomain = ${JSON.stringify(createRow('none'))};
+const labelTempEmailDomain = { textContent: '' };
 const cloudflareTempEmailSection = ${JSON.stringify(createRow('none'))};
 const hotmailSection = ${JSON.stringify(createRow('none'))};
 const mail2925Section = ${JSON.stringify(createRow('none'))};
@@ -436,7 +538,21 @@ const rowHotmailLocalBaseUrl = ${JSON.stringify(createRow('none'))};
 const inputMail2925UseAccountPool = { checked: false };
 const selectMailProvider = { value: '163' };
 const selectEmailGenerator = { value: 'cloudflare-temp-email', disabled: false };
+const selectTempEmailDomain = { value: 'mail.example.com' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = {
+  value: 'team',
+  attributes: {},
+  classList: createClassList(),
+  setAttribute(name, value) { this.attributes[name] = String(value); },
+};
+const tempEmailSubdomainPrefixFeedback = { textContent: '', classList: createClassList() };
+const tempEmailEffectiveDomainPreview = { textContent: '' };
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE = 'none';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
+const DEFAULT_CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE = 'none';
 const calls = {
   tempDomainEditMode: [],
 };
@@ -447,6 +563,31 @@ function usesGeneratedAliasMailProvider() { return false; }
 function getSelectedMail2925Mode() { return 'provide'; }
 let selectedCloudflareTempEmailLookupMode = 'receive-mailbox';
 function getSelectedCloudflareTempEmailLookupMode() { return selectedCloudflareTempEmailLookupMode; }
+function normalizeCloudflareTempEmailSubdomainMode(value = '') {
+  const normalized = String(value || '').trim().toLowerCase();
+  return ['random', 'fixed'].includes(normalized) ? normalized : 'none';
+}
+function syncCloudflareTempEmailSubdomainModeButtons(mode) {
+  const resolvedMode = normalizeCloudflareTempEmailSubdomainMode(mode);
+  tempEmailSubdomainModeButtons.forEach((button) => {
+    const active = button.dataset.tempEmailSubdomainMode === resolvedMode;
+    button.classList.toggle('is-active', active);
+    button.setAttribute('aria-pressed', String(active));
+  });
+}
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+function getCloudflareTempEmailSubdomainPrefixValidation(value = '') {
+  const raw = String(value || '').trim();
+  if (!raw) return { raw, normalized: '', valid: false, message: '请填写子域前缀' };
+  const normalized = normalizeCloudflareTempEmailSubdomainPrefixValue(raw);
+  return normalized
+    ? { raw, normalized, valid: true, message: '' }
+    : { raw, normalized: '', valid: false, message: '仅支持 1-63 位字母、数字或中划线，且不能以中划线开头或结尾' };
+}
 function getManagedAliasProviderUiCopy() { return null; }
 function getCurrentRegistrationEmailUiCopy() {
   return {
@@ -460,6 +601,17 @@ function getSelectedHotmailServiceMode() { return 'local'; }
 function getCloudflareDomainsFromState() { return { domains: [], activeDomain: '' }; }
 function setCloudflareDomainEditMode() {}
 function getCloudflareTempEmailDomainsFromState() { return { domains: ['mail.example.com'], activeDomain: 'mail.example.com' }; }
+function normalizeCloudflareTempEmailDomainValue(value = '') { return String(value || '').trim().toLowerCase(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value = '') {
+  const normalized = String(value || '').trim().toLowerCase();
+  return /^[a-z0-9](?:[a-z0-9-]{0,61}[a-z0-9])?$/.test(normalized) ? normalized : '';
+}
+function buildCloudflareTempEmailEffectiveDomainValue(domain = '', subdomainPrefix = '', options = {}) {
+  const normalizedDomain = normalizeCloudflareTempEmailDomainValue(domain);
+  const normalizedPrefix = normalizeCloudflareTempEmailSubdomainPrefixValue(subdomainPrefix);
+  if (options.requirePrefix && !normalizedPrefix) return '';
+  return normalizedPrefix ? \`\${normalizedPrefix}.\${normalizedDomain}\` : normalizedDomain;
+}
 function setCloudflareTempEmailDomainEditMode(editing) { calls.tempDomainEditMode.push(editing); }
 function queueIcloudAliasRefresh() {}
 function hideIcloudLoginHelp() {}
@@ -476,9 +628,17 @@ return {
   cloudflareTempEmailSection,
   rowTempEmailLookupMode,
   rowTempEmailReceiveMailbox,
-  rowTempEmailRandomSubdomainToggle,
+  rowTempEmailSubdomainMode,
+  rowTempEmailFixedSubdomainPrefix,
   rowTempEmailDomain,
+  labelTempEmailDomain,
   inputTempEmailUseRandomSubdomain,
+  inputTempEmailUseFixedSubdomain,
+  inputTempEmailSubdomainPrefix,
+  tempEmailSubdomainModeCaption,
+  tempEmailSubdomainPrefixFeedback,
+  tempEmailEffectiveDomainPreview,
+  btnFetchEmail,
   selectMailProvider,
   selectEmailGenerator,
   setLookupMode(value) {
@@ -491,8 +651,10 @@ return {
 
   api.updateMailProviderUI();
   assert.equal(api.cloudflareTempEmailSection.style.display, '');
-  assert.equal(api.rowTempEmailRandomSubdomainToggle.style.display, '');
+  assert.equal(api.rowTempEmailSubdomainMode.style.display, '');
+  assert.equal(api.rowTempEmailFixedSubdomainPrefix.style.display, 'none');
   assert.equal(api.rowTempEmailDomain.style.display, '');
+  assert.equal(api.labelTempEmailDomain.textContent, 'Temp 域名');
 
   api.selectMailProvider.value = 'cloudflare-temp-email';
   api.selectEmailGenerator.value = 'duck';
@@ -513,4 +675,29 @@ return {
   assert.equal(api.cloudflareTempEmailSection.style.display, '');
   assert.equal(api.rowTempEmailDomain.style.display, '');
   assert.match(api.autoHintText.textContent, /RANDOM_SUBDOMAIN_DOMAINS/);
+  assert.match(api.autoHintText.textContent, /Email Routing\/MX/);
+  assert.match(api.tempEmailSubdomainModeCaption.textContent, /随机子域/);
+
+  api.inputTempEmailUseRandomSubdomain.checked = false;
+  api.inputTempEmailUseFixedSubdomain.checked = true;
+  api.inputTempEmailSubdomainPrefix.value = 'team';
+  api.updateMailProviderUI();
+  assert.equal(api.rowTempEmailFixedSubdomainPrefix.style.display, '');
+  assert.equal(api.labelTempEmailDomain.textContent, '基础域名');
+  assert.equal(api.tempEmailEffectiveDomainPreview.textContent, '最终域名：team.mail.example.com');
+  assert.equal(api.tempEmailSubdomainPrefixFeedback.textContent, '');
+  assert.equal(api.inputTempEmailSubdomainPrefix.attributes['aria-invalid'], 'false');
+  assert.equal(api.btnFetchEmail.disabled, false);
+  assert.match(api.autoHintText.textContent, /team\.mail\.example\.com/);
+  assert.match(api.autoHintText.textContent, /ENABLE_CREATE_ADDRESS_SUBDOMAIN_MATCH/);
+  assert.match(api.autoHintText.textContent, /Email Routing\/MX/);
+
+  api.inputTempEmailSubdomainPrefix.value = '';
+  api.updateMailProviderUI();
+  assert.equal(api.btnFetchEmail.disabled, true);
+  assert.equal(api.tempEmailEffectiveDomainPreview.textContent, '');
+  assert.equal(api.tempEmailSubdomainPrefixFeedback.textContent, '请填写子域前缀');
+  assert.equal(api.tempEmailSubdomainPrefixFeedback.classList.contains('is-error'), true);
+  assert.equal(api.inputTempEmailSubdomainPrefix.attributes['aria-invalid'], 'true');
+  assert.match(api.autoHintText.textContent, /请填写子域前缀/);
 });

tests/sidepanel-contribution-mode.test.js

@@ -245,6 +245,15 @@ const inputTempEmailAdminAuth = { value: 'admin-secret' };
 const inputTempEmailCustomAuth = { value: 'custom-secret' };
 const inputTempEmailReceiveMailbox = { value: 'relay@example.com' };
 const inputTempEmailUseRandomSubdomain = { checked: true };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = { value: '' };
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
 const inputAutoSkipFailures = { checked: false };
 const inputAutoSkipFailuresThreadIntervalMinutes = { value: '5' };
 const inputAutoStepDelaySeconds = { value: '10' };
@@ -293,6 +302,7 @@ function normalizeLuckmailBaseUrl(value) { return String(value || '').trim(); }
 function normalizeLuckmailEmailType(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailReceiveMailboxValue(value) { return String(value || '').trim(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeAutoRunThreadIntervalMinutes(value) { return Number(value) || 0; }
 function normalizeAutoStepDelaySeconds(value) { return value === '' ? null : Number(value); }
 function normalizeVerificationResendCount(value, fallback) { return Number.isFinite(Number(value)) ? Number(value) : fallback; }

tests/sidepanel-icloud-provider.test.js

@@ -130,6 +130,15 @@ const inputTempEmailAdminAuth = { value: '' };
 const inputTempEmailCustomAuth = { value: '' };
 const inputTempEmailReceiveMailbox = { value: '' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = { value: '' };
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
 const inputAutoSkipFailures = { checked: false };
 const inputAutoSkipFailuresThreadIntervalMinutes = { value: '0' };
 const inputAutoStepDelaySeconds = { value: '' };
@@ -215,6 +224,7 @@ function normalizeLuckmailBaseUrl(value) { return String(value || '').trim(); }
 function normalizeLuckmailEmailType(value) { return String(value || '').trim() || 'ms_graph'; }
 function normalizeCloudflareTempEmailBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailReceiveMailboxValue(value) { return String(value || '').trim(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeAccountRunHistoryHelperBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeAutoRunThreadIntervalMinutes(value) { return Number(value) || 0; }
 function normalizeAutoStepDelaySeconds(value) { return value === '' ? null : Number(value); }
@@ -272,8 +282,13 @@ const rowTempEmailBaseUrl = createRow();
 const rowTempEmailAdminAuth = createRow();
 const rowTempEmailCustomAuth = createRow();
 const rowTempEmailReceiveMailbox = createRow();
-const rowTempEmailRandomSubdomainToggle = createRow();
+const rowTempEmailLookupMode = createRow();
+const rowTempEmailSubdomainMode = createRow();
+const tempEmailSubdomainModeButtons = [];
+const tempEmailSubdomainModeCaption = { textContent: '' };
+const rowTempEmailFixedSubdomainPrefix = createRow();
 const rowTempEmailDomain = createRow();
+const labelTempEmailDomain = { textContent: '' };
 const cloudflareTempEmailSection = createRow();
 const hotmailSection = createRow();
 const mail2925Section = createRow();
@@ -295,14 +310,30 @@ const rowHotmailLocalBaseUrl = createRow();
 const inputMail2925UseAccountPool = { checked: false };
 const selectMailProvider = { value: 'icloud' };
 const selectEmailGenerator = { value: 'duck', disabled: false, options: [] };
+const selectTempEmailDomain = { value: '' };
 const selectIcloudTargetMailboxType = { value: 'icloud-inbox' };
 const selectIcloudForwardMailProvider = { value: 'gmail' };
 const selectIcloudHostPreference = { value: 'icloud.com.cn' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = {
+  value: '',
+  classList: { toggle() {} },
+  setAttribute() {},
+};
+const tempEmailSubdomainPrefixFeedback = {
+  textContent: '',
+  classList: { toggle() {} },
+};
+const tempEmailEffectiveDomainPreview = { textContent: '' };
 const inputRunCount = { disabled: false };
 const currentAutoRun = { autoRunning: false };
 const MAIL_PROVIDER_LOGIN_CONFIGS = { gmail: { label: 'Gmail 邮箱' } };
 const ICLOUD_FORWARD_MAIL_PROVIDER_LABELS = { gmail: 'Gmail 邮箱' };
+const CLOUDFLARE_TEMP_EMAIL_LOOKUP_MODE_REGISTRATION_EMAIL = 'registration-email';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_NONE = 'none';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
 function normalizeIcloudHost(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeIcloudTargetMailboxType(value) { return String(value || '').trim().toLowerCase() === 'forward-mailbox' ? 'forward-mailbox' : 'icloud-inbox'; }
 function normalizeIcloudForwardMailProvider(value) { return String(value || '').trim().toLowerCase() === 'gmail' ? 'gmail' : 'qq'; }
@@ -313,6 +344,27 @@ function isIcloudMailProvider() { return selectMailProvider.value === ICLOUD_PRO
 function usesCustomMailProviderPool() { return false; }
 function usesGeneratedAliasMailProvider() { return false; }
 function getSelectedMail2925Mode() { return 'provide'; }
+function getSelectedCloudflareTempEmailLookupMode() { return 'receive-mailbox'; }
+function syncCloudflareTempEmailSubdomainModeButtons() {}
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+function normalizeCloudflareTempEmailDomainValue(value = '') { return String(value || '').trim().toLowerCase(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value = '') { return String(value || '').trim().toLowerCase(); }
+function getCloudflareTempEmailSubdomainPrefixValidation(value = '') {
+  const raw = String(value || '').trim();
+  return raw
+    ? { raw, normalized: raw.toLowerCase(), valid: true, message: '' }
+    : { raw, normalized: '', valid: false, message: '请填写子域前缀' };
+}
+function buildCloudflareTempEmailEffectiveDomainValue(domain = '', subdomainPrefix = '', options = {}) {
+  const normalizedDomain = normalizeCloudflareTempEmailDomainValue(domain);
+  const normalizedPrefix = normalizeCloudflareTempEmailSubdomainPrefixValue(subdomainPrefix);
+  if (options.requirePrefix && !normalizedPrefix) return '';
+  return normalizedPrefix && normalizedDomain ? \`\${normalizedPrefix}.\${normalizedDomain}\` : normalizedDomain;
+}
 function getManagedAliasProviderUiCopy() { return null; }
 function getCurrentRegistrationEmailUiCopy() { return { buttonLabel: '获取邮箱', placeholder: '邮箱', label: '邮箱' }; }
 function updateMailLoginButtonState() {}

tests/sidepanel-mail2925-base-email.test.js

@@ -201,6 +201,15 @@ const inputTempEmailAdminAuth = { value: '' };
 const inputTempEmailCustomAuth = { value: '' };
 const inputTempEmailReceiveMailbox = { value: '' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = { value: '' };
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
 const inputAutoSkipFailures = { checked: false };
 const inputAutoSkipFailuresThreadIntervalMinutes = { value: '0' };
 const inputAutoStepDelaySeconds = { value: '' };
@@ -253,6 +262,7 @@ function normalizeLuckmailBaseUrl(value) { return String(value || '').trim(); }
 function normalizeLuckmailEmailType(value) { return String(value || '').trim() || 'ms_graph'; }
 function normalizeCloudflareTempEmailBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailReceiveMailboxValue(value) { return String(value || '').trim(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeAccountRunHistoryHelperBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeAutoRunThreadIntervalMinutes(value) { return Number(value) || 0; }
 function normalizeAutoStepDelaySeconds(value) { return value === '' ? null : Number(value); }

tests/sidepanel-phone-verification-settings.test.js

@@ -976,6 +976,15 @@ const inputTempEmailAdminAuth = { value: '' };
 const inputTempEmailCustomAuth = { value: '' };
 const inputTempEmailReceiveMailbox = { value: '' };
 const inputTempEmailUseRandomSubdomain = { checked: false };
+const inputTempEmailUseFixedSubdomain = { checked: false };
+const inputTempEmailSubdomainPrefix = { value: '' };
+function getSelectedCloudflareTempEmailSubdomainMode() {
+  if (inputTempEmailUseFixedSubdomain.checked) return 'fixed';
+  if (inputTempEmailUseRandomSubdomain.checked) return 'random';
+  return 'none';
+}
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_RANDOM = 'random';
+const CLOUDFLARE_TEMP_EMAIL_SUBDOMAIN_MODE_FIXED = 'fixed';
 const inputAutoSkipFailures = { checked: false };
 const inputAutoSkipFailuresThreadIntervalMinutes = { value: '0' };
 const inputAutoStepDelaySeconds = { value: '' };
@@ -1067,6 +1076,7 @@ function normalizeLuckmailBaseUrl(value) { return String(value || '').trim(); }
 function normalizeLuckmailEmailType(value) { return String(value || '').trim() || 'ms_graph'; }
 function normalizeCloudflareTempEmailBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeCloudflareTempEmailReceiveMailboxValue(value) { return String(value || '').trim(); }
+function normalizeCloudflareTempEmailSubdomainPrefixValue(value) { return String(value || '').trim().toLowerCase(); }
 function normalizeAccountRunHistoryHelperBaseUrlValue(value) { return String(value || '').trim(); }
 function normalizeAutoRunThreadIntervalMinutes(value) { return Number(value) || 0; }
 function normalizeAutoStepDelaySeconds(value) { return value === '' ? null : Number(value); }

项目完整链路说明.md

@@ -59,7 +59,7 @@
 - 展示 `Plus 模式` 开关、`账号接入策略` 与 `Plus 支付` 配置；`账号接入策略` 固定放在 `Plus 支付` 上方，只提供 `OAuth / 使用会话 JSON 导入` 两种接入方式，会话导入的 CPA / SUB2API 目标由上方 `来源` 自动决定，不支持会话导入的来源会直接禁用为仅 OAuth；支付方式支持 PayPal / GoPay / GPC，PayPal 展示账号池下拉与添加按钮，GoPay 展示手机号和 PIN，GPC 展示只读 API 地址、API Key、专用手机号、OTP 渠道、本地 OTP helper 开关与 URL、PIN；GPC 的 `购买卡密` 按钮打开卡密购买页，`转换 API Key` 按钮打开 `https://gpc.qlhazycoder.top/`；步骤列表会按支付方式和账号接入策略动态切换，普通模式的注册成功等待步骤不再显示或执行；Plus 模式下手机号注册不可用，只允许邮箱注册
 - 展示 `执行范围` 配置；当前 UI 只在 codex/openai flow 显示，保存为通用的 `stepExecutionRangeByFlow`，用于指定允许执行的起止步骤。开启后，范围外节点在侧栏中显示为禁用态，手动按钮、手动跳过入口与进度计数只按允许节点计算。
 - 为 Hotmail / 2925 账号池复用同一套“添加账号 / 取消添加 / 批量导入 / 收起列表”表单交互；共享的显隐控制放在 `sidepanel/account-pool-ui.js`，各自 manager 只保留 provider 相关字段校验与业务操作
-- `Cloudflare Temp Email` 在侧栏中有独立区域，支持“按注册邮箱查信 / 按接收邮箱查信”切换、可编辑域名列表、随机子域名开关，以及教程/部署入口；域名选择由 `sidepanel/editable-list-picker.js` 统一承接
+- `Cloudflare Temp Email` 在侧栏中有独立区域，支持“按注册邮箱查信 / 按接收邮箱查信”切换、可编辑域名列表、随机子域名开关、固定子域名开关与子域前缀输入，以及教程/部署入口；域名选择由 `sidepanel/editable-list-picker.js` 统一承接
 - `SUB2API` 目标在分组配置下方额外暴露 `账号优先级`；该值会随设置一起持久化，并在后台直连创建账号时原样透传给 SUB2API 管理接口
 - 点击“自动”或其他自动化入口时，sidepanel 会附带当前浏览器窗口 ID；后台后续查找、复用和接管标签页时优先锁定在这一个 automation window 内，避免串到其他窗口
 
@@ -273,7 +273,7 @@
 - 2925 是否启用号池模式 `mail2925UseAccountPool`
 - 2925 当前选中的号池账号 ID `currentMail2925AccountId`
 - Cloudflare / Temp Email 设置
-- Cloudflare Temp Email 细分配置：`cloudflareTempEmailLookupMode / cloudflareTempEmailUseRandomSubdomain / cloudflareTempEmailDomain / cloudflareTempEmailDomains`
+- Cloudflare Temp Email 细分配置：`cloudflareTempEmailLookupMode / cloudflareTempEmailUseRandomSubdomain / cloudflareTempEmailUseFixedSubdomain / cloudflareTempEmailSubdomainPrefix / cloudflareTempEmailDomain / cloudflareTempEmailDomains`
 - 注册方式 `signupMethod`
 - 接码开关、接码平台 `phoneSmsProvider`，以及 HeroSMS / 5sim 各自的 API Key、国家/地区、价格上限和平台扩展设置
 - iCloud 相关偏好
@@ -1251,4 +1251,3 @@ Hide My Email 获取与管理链路：
 - `2925` 在 Step 4 / Step 8 现在会携带固定的步骤开始时间窗口，实际筛选下限为“步骤开始时间向前回看 10 分钟”。
 - 为了保留这段固定时间窗内已经到达的验证码邮件，后台不再在轮询开始前预先清空 2925 邮箱。
 - `2925` 验证码最终提交成功后，后台仍会异步发送 `DELETE_ALL_EMAILS` 做收尾清理。
-

项目文件结构说明.md

@@ -23,7 +23,7 @@
 - `README.md`：面向使用者的精简说明文档，主要介绍项目用途、功能范围、快速开始与文档入口；不再承载过多技术实现细节。
 - `background.js`：扩展后台 Service Worker 入口壳，负责模块装配、初始化、全局常量、少量保留的领域函数与运行入口；当前已按 `activeFlowId` 装配 flow-aware 的步骤定义、执行注册表、自动运行与状态同步，OAuth 后链 5 分钟总预算只由 `openai + cpa` target capability 自动启用，其他来源与 flow 不启用该预算；`openai` flow 继续承接 `stepExecutionRangeByFlow`，`kiro` flow 走独立的“注册页 1-6 步 -> 桌面授权 7-8 步 -> `kiro.rs` 上传 9 步”链路，`grok` flow 走独立的“注册页 1-4 步 -> SSO Cookie 提取 5 步 -> `webchat2api` 上传 6 步”链路。
 - `cloudmail-utils.js`：Cloud Mail / SkyMail 相关的纯工具函数，负责 API 地址、域名、鉴权头、邮件列表响应与邮件正文归一化。
-- `cloudflare-temp-email-utils.js`：Cloudflare Temp Email 相关的纯工具函数，负责 URL、域名、邮件内容与 MIME 数据归一化。
+- `cloudflare-temp-email-utils.js`：Cloudflare Temp Email 相关的纯工具函数，负责 URL、基础域名、固定子域有效域名、邮件内容与 MIME 数据归一化。
 - `gopay-utils.js`：GoPay / GPC Plus 支付相关纯工具函数，负责支付方式归一化、GoPay 手机号/OTP/PIN 归一化、GPC API 地址归一化、API Key 请求头、任务创建/查询/OTP/PIN/停止 URL 与余额响应解析。
 - `hotmail-utils.js`：Hotmail 账号与验证码提取相关的纯工具函数，负责账号筛选、验证码匹配、第三方接口数据归一化。
 - `icloud-utils.js`：iCloud 隐私邮箱相关的纯工具函数，负责 host、别名列表、保留状态、已用状态等归一化。
@@ -255,7 +255,7 @@
 - `tests/background-account-history-settings.test.js`：测试账号运行历史的独立配置项归一化，不再复用 Hotmail 模式作为启停条件。
 - `tests/background-auth-chain-guard.test.js`：测试认证顶层链路的去重、Stop 重抛、OAuth 总预算窗口和 `fetch-signup-code` 网络重试边界。
 - `tests/background-auth-tab-snapshot.test.js`：测试认证标签快照在脚本执行失败时会回退到标签页 URL 做页面状态判断。
-- `tests/background-cloudflare-temp-email-settings.test.js`：测试 Cloudflare Temp Email 随机子域名设置与 OAuth 总超时配置的持久化归一化。
+- `tests/background-cloudflare-temp-email-settings.test.js`：测试 Cloudflare Temp Email 随机/固定子域名设置与 OAuth 总超时配置的持久化归一化。
 - `tests/background-cpa-api.test.js`：测试 CPA 管理接口模块的地址归一化、OAuth 地址获取、callback 提交，以及 ChatGPT 会话导入 payload 构建与返回结果。
 - `tests/background-cpa-session-import.test.js`：测试 CPA 会话导入尾节点的标签页选择、会话读取、日志上报、结果透传和后台接线约束。
 - `tests/background-cpa-state-plumbing.test.js`：测试步骤 1 与消息路由对 CPA OAuth 运行态字段的保存、回写和 reset 接线。
@@ -338,7 +338,7 @@
 - `tests/qq-mail-content.test.js`：测试 QQ 邮箱内容脚本会把 runtime mail rule 的验证码模式转发到新邮件匹配链路。
 - `tests/run-count-unlimited.test.js`：测试自动运行轮数不再被 50 封顶，且旧 active 状态不会把手动输入轮数重置回去。
 - `tests/cloudflare-temp-email-provider.test.js`：测试 Cloudflare Temp Email provider 的轮询与目标邮箱选择逻辑。
-- `tests/cloudflare-temp-email-utils.test.js`：测试 Cloudflare Temp Email 工具层的 URL、域名、邮件解析逻辑。
+- `tests/cloudflare-temp-email-utils.test.js`：测试 Cloudflare Temp Email 工具层的 URL、域名、固定子域有效域名与邮件解析逻辑。
 - `tests/cloudmail-provider.test.js`：测试 Cloud Mail provider 的验证码轮询和生成/转发收件目标邮箱选择逻辑，并覆盖生成邮箱时对共享注册邮箱状态持久化的接入。
 - `tests/cloudmail-utils.test.js`：测试 Cloud Mail 工具层的 URL、域名、鉴权头、Token 与邮件响应归一化逻辑。
 - `tests/content-operation-delay.test.js`：测试内容脚本操作间延迟层的执行顺序、默认启用、排除步骤、悬挂恢复和 stop-aware sleep。
@@ -382,7 +382,7 @@
 - `tests/grok-runner.test.js`：测试 Grok 注册页执行器对邮箱提交、验证码轮询、资料提交、SSO Cookie 提取、账号记录收尾和完成状态持久化的关键链路。
 - `tests/sidepanel-auto-run-content-refresh.test.js`：测试点击“自动”时会先冻结当前轮数并刷新贡献内容更新摘要，且刷新失败或启动前状态回灌不会阻塞或改写自动流程启动目标。
 - `tests/sidepanel-auto-run-risk-warning.test.js`：测试自动运行在高轮数且未配置节点轮询时会弹出风险提醒。
-- `tests/sidepanel-cloudflare-temp-email-random-subdomain.test.js`：测试 Cloudflare Temp Email 独立区域、随机子域名开关、域名列表恢复与提示文案联动。
+- `tests/sidepanel-cloudflare-temp-email-random-subdomain.test.js`：测试 Cloudflare Temp Email 独立区域、随机/固定子域名开关、域名列表恢复与提示文案联动。
 - `tests/sidepanel-header-links.test.js`：测试侧边栏头部仓库首页与 Releases 入口的 HTML 接线与链接解析。
 - `tests/sidepanel-icloud-manager.test.js`：测试侧边栏 iCloud 管理器模块接线与空态渲染。
 - `tests/sidepanel-icloud-provider.test.js`：测试侧边栏 iCloud 登录地址解析、目标邮箱类型 / 转发邮箱 provider 保存、回显和显隐联动。
@@ -433,4 +433,3 @@
 - `tests/verification-stop-propagation.test.js`：测试验证码流程在 Stop 场景下的错误传播与不中途降级。
 - `tests/verification-flow-polling.test.js`：测试 2925 长轮询参数、验证码提交流程中的 `beforeSubmit` 钩子执行顺序，以及步骤 8 提交验证码后进入手机号页时会把“继续手机号验证”状态交给步骤 9 处理。
 
-