diff --git a/background/steps/fetch-login-code.js b/background/steps/fetch-login-code.js
index 8bf53c4..7baad00 100644
--- a/background/steps/fetch-login-code.js
+++ b/background/steps/fetch-login-code.js
@@ -9,6 +9,7 @@
       chrome,
       CLOUDFLARE_TEMP_EMAIL_PROVIDER,
       confirmCustomVerificationStepBypass,
+      ensureMail2925MailboxSession,
       ensureStep8VerificationPageReady,
       getOAuthFlowRemainingMs,
       getOAuthFlowStepTimeoutMs,
@@ -57,6 +58,20 @@
       return String(value || '').trim().toLowerCase();
     }
 
+    function getExpectedMail2925MailboxEmail(state = {}) {
+      if (Boolean(state?.mail2925UseAccountPool)) {
+        const currentAccountId = String(state?.currentMail2925AccountId || '').trim();
+        const accounts = Array.isArray(state?.mail2925Accounts) ? state.mail2925Accounts : [];
+        const currentAccount = accounts.find((account) => String(account?.id || '') === currentAccountId) || null;
+        const accountEmail = String(currentAccount?.email || '').trim().toLowerCase();
+        if (accountEmail) {
+          return accountEmail;
+        }
+      }
+
+      return String(state?.mail2925BaseEmail || '').trim().toLowerCase();
+    }
+
     async function focusOrOpenMailTab(mail) {
       const alive = await isTabAlive(mail.source);
       if (alive) {
@@ -134,7 +149,17 @@
         await addLog(`步骤 8：正在通过 ${mail.label} 轮询验证码...`);
       } else {
         await addLog(`步骤 8：正在打开${mail.label}...`);
-        await focusOrOpenMailTab(mail);
+        if (mail.provider === '2925' && typeof ensureMail2925MailboxSession === 'function') {
+          await ensureMail2925MailboxSession({
+            accountId: state.currentMail2925AccountId || null,
+            forceRelogin: false,
+            allowLoginWhenOnLoginPage: Boolean(state?.mail2925UseAccountPool),
+            expectedMailboxEmail: getExpectedMail2925MailboxEmail(state),
+            actionLabel: 'Step 8: ensure 2925 mailbox session',
+          });
+        } else {
+          await focusOrOpenMailTab(mail);
+        }
         if (mail.provider === '2925') {
           await addLog(`步骤 8：将直接使用当前已登录的 ${mail.label} 轮询验证码。`, 'info');
         }
diff --git a/tests/background-step7-recovery.test.js b/tests/background-step7-recovery.test.js
index 0462f6d..21678e0 100644
--- a/tests/background-step7-recovery.test.js
+++ b/tests/background-step7-recovery.test.js
@@ -92,6 +92,7 @@ test('step 8 submits login verification directly without replaying step 7', asyn
 test('step 8 uses a fixed 10-minute lookback window and disables resend interval for 2925 mailbox polling', async () => {
   let capturedOptions = null;
   let ensureCalls = 0;
+  let ensureOptions = null;
   const tabUpdates = [];
   const tabReuses = [];
   const realDateNow = Date.now;
@@ -108,8 +109,9 @@ test('step 8 uses a fixed 10-minute lookback window and disables resend interval
     },
     CLOUDFLARE_TEMP_EMAIL_PROVIDER: 'cloudflare-temp-email',
     confirmCustomVerificationStepBypass: async () => {},
-    ensureMail2925MailboxSession: async () => {
+    ensureMail2925MailboxSession: async (options) => {
       ensureCalls += 1;
+      ensureOptions = options;
     },
     ensureStep8VerificationPageReady: async () => ({ state: 'verification_page' }),
     rerunStep7ForStep8Recovery: async () => {},
@@ -122,7 +124,15 @@ test('step 8 uses a fixed 10-minute lookback window and disables resend interval
       url: 'https://2925.com',
       navigateOnReuse: false,
     }),
-    getState: async () => ({ email: 'user@example.com', password: 'secret' }),
+    getState: async () => ({
+      email: 'user@example.com',
+      password: 'secret',
+      mail2925UseAccountPool: true,
+      currentMail2925AccountId: 'acc-1',
+      mail2925Accounts: [
+        { id: 'acc-1', email: 'pool-user@2925.com' },
+      ],
+    }),
     getTabId: async (sourceName) => (sourceName === 'signup-page' ? 1 : 2),
     HOTMAIL_PROVIDER: 'hotmail-api',
     isTabAlive: async () => true,
@@ -148,16 +158,26 @@ test('step 8 uses a fixed 10-minute lookback window and disables resend interval
       password: 'secret',
       oauthUrl: 'https://oauth.example/latest',
       mail2925UseAccountPool: true,
+      currentMail2925AccountId: 'acc-1',
+      mail2925Accounts: [
+        { id: 'acc-1', email: 'pool-user@2925.com' },
+      ],
     });
   } finally {
     Date.now = realDateNow;
   }
 
-  assert.equal(ensureCalls, 0);
+  assert.equal(ensureCalls, 1);
+  assert.deepStrictEqual(ensureOptions, {
+    accountId: 'acc-1',
+    forceRelogin: false,
+    allowLoginWhenOnLoginPage: true,
+    expectedMailboxEmail: 'pool-user@2925.com',
+    actionLabel: 'Step 8: ensure 2925 mailbox session',
+  });
   assert.deepStrictEqual(tabReuses, []);
   assert.deepStrictEqual(tabUpdates, [
     { tabId: 1, payload: { active: true } },
-    { tabId: 2, payload: { active: true } },
   ]);
   assert.equal(capturedOptions.filterAfterTimestamp, 300000);
   assert.equal(capturedOptions.resendIntervalMs, 0);