Gmail no longer working in outlook

Question

Gmail will not send and is no longer working in outlook error 0x80070057

Answer 1

Hello

The AI answer is not entirely correct.

Please use the method outlined here instead: https://support.microsoft.com/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67

Answer 2

Error 0x80070057 when sending with Gmail in classic Outlook is commonly related to recent changes in Google authentication and how Outlook connects to Gmail.

Use these steps that are supported in the provided context:

1. Verify IMAP is enabled in Gmail
   1. In a browser, go to Gmail.
   2. Open Settings (gear icon) > See all settings.
   3. Go to Forwarding and POP/IMAP.
   4. Under IMAP access, select Enable IMAP.
   5. Select Save Changes.
2. Confirm the Gmail server settings in Outlook In Outlook (classic), open the account settings for the Gmail profile and confirm:
   • Incoming mail (IMAP) server: imap.gmail.com
     • SSL: Yes
     • Port: 993
   • Outgoing mail (SMTP) server: smtp.gmail.com
     • SSL: Yes
     • TLS: Yes (if available)
     • Authentication: Yes (same username/password as incoming)
     • Port for SSL: 465
     • Port for TLS/STARTTLS: 587
   Ensure the full Gmail address is used as the username and the correct password (or app password, if configured) is entered.
3. Check for the known Gmail/Outlook sign-in issue and update Outlook There is a known issue where adding or syncing Gmail in classic Outlook can fail with Google-related errors. The Outlook team released a fix in newer builds. Make sure Outlook for Microsoft 365 is updated to a build that includes the Gmail sign-in fix:
   • Beta Channel: Version 2404 (Build 17531.10000)
   • Current Channel Preview: Version 2404 (Build 17531.10000)
   • Current Channel: Version 2404 (Build 17531.10000)
   • Monthly Enterprise Channel: Version 2407 (Build 17727.10000)
   After updating Outlook, restart it and test sending again.
4. If Gmail was added via Outlook.com “connected accounts” Outlook.com no longer supports adding new third‑party connected accounts (like Gmail) and no longer syncs existing connected accounts. If Gmail was connected this way, sending/receiving can stop working. In that case, use one of the alternatives described in the Outlook.com article (for example, access Gmail directly or configure Gmail as a separate account in Outlook instead of as a connected account in Outlook.com).

If the problem started recently and coincides with changes to authentication (for example, switching from a Microsoft app password to a Google app password or vice versa), verify that the correct app password type is used for Gmail in Outlook classic.

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References:

• Fix problems connecting your Google account to the Microsoft Cloud
• Unable to sign in or add a Gmail account to classic Outlook
• Connected email accounts like Gmail and Yahoo not working in Outlook.com
• The operation failed error when you send email messages in Outlook
• gmail accounts no longer working in outlook classic - Microsoft Q&A
• search for solutions another user has found - Microsoft Q&A