Outlook stopped receiving and sending emails from my gmail account

Hello

Many users seem to have this issue recently. Microsoft is still investigating this issue. The current workaround is published here: https://support.microsoft.com/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67

Outlook 365 can stop sending/receiving Gmail if the Google connection or Gmail’s IMAP settings are no longer valid.

Use these steps to restore functionality:

1. Confirm IMAP is enabled in Gmail
   1. In a browser, go to Gmail.
   2. Select Settings (gear) > See all settings.
   3. Open the Forwarding and POP/IMAP tab.
   4. Under IMAP Access, make sure Enable IMAP is selected.
   5. Select Save Changes.
2. Verify the Gmail server settings in Outlook Ensure the account in Outlook is using the correct IMAP/SMTP settings:
   • Incoming mail (IMAP) server: imap.gmail.com
     • Requires SSL: Yes
     • Port: 993
   • Outgoing mail (SMTP) server: smtp.gmail.com
     • Requires SSL: Yes
     • Requires TLS: Yes (if available)
     • Requires Authentication: Yes
     • Port for SSL: 465
     • Port for TLS/STARTTLS: 587
   • Account name/username: full Gmail address
   • Password: current Gmail password (or app password if using that method)
   If these are incorrect, edit the account in Outlook and update them to match.
3. Re-authorize Gmail access for Outlook (classic Outlook) Recent changes in Google/Microsoft integration can break existing Gmail connections if the required permission was not granted.
   • If using classic Outlook and seeing IMAP/connection errors, update Office to the latest Current Channel version.
   • When Outlook prompts to sign in to Google in a browser, ensure the permission is granted for: “Read, compose, send, and permanently delete all your email from Gmail.”
   • If the account is already added but failing, use the Retry link in the Outlook error window to repeat the browser sign-in and accept that permission.
4. If still failing, remove and re-add the Gmail account in Outlook
   • Remove the Gmail account from the Outlook profile.
   • Confirm IMAP is enabled in Gmail (step 1).
   • Add the Gmail account again in Outlook and complete the Google sign-in, making sure to accept the full email access permission when prompted.

If the issue began “two days ago” without any changes on the device, it is likely related to the Gmail–Outlook connection permissions or IMAP settings, so steps 1–3 are the most critical.

References:

• Unable to add a Gmail account to classic Outlook
• Fix problems connecting your Google account to the Microsoft Cloud
• I can't send or receive messages in Outlook
• gmail accounts no longer working in outlook classic - Microsoft Q&A