Send/receive error on my Outlook Classic email

Question

Send/receive error on my Outlook Classic email

Connie Varner 0

About a week ago, my Outlook Classic (part of Office 365, which is a valid subscription) stopped working. I am using two Gmail addresses, both configured in Outlook Classic with a valid app password. I have tried setting-up a new profile in Outlook, but that doesn't work. When I go to the setup for my current profile, it appears to be OK. When I test the IMAP settings for my profile, they pass. I can login to the incoming mail server and the test message is sent successfully. I have tried updating the Office 365 software and I have done all of the usual troubleshooting (close Outlook/re-open Outlook, reboot, etc.), but I still get "Send/Receive error" in Outlook. My Gmail works fine in the Gmail app in a browser. However, I like Outlook (specifically the Classic version; I don't like new Outlook). What do I need to do to get Outlook Classic working again? Thanks.

Anonymous

2026-03-23T18:40:27.7166667+00:00

Connie,

There was a bug that was affecting send/receive and no sign in prompt. That bug just got fixed from the service. You should be able to restart Outlook to mitigate the issue. Here is the reference article, https://support.microsoft.com/en-us/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67. It will be updated shortly to show as fixed.

For classic Outlook you should not need to use an App Password. Outlook uses OAuth which means you can use your regular password through browser sign in. If you changed your password, it will take Outlook an hour for the token to expire to prompt you for sign in. If you are not getting prompted to sign in you can use the workarounds in the article I shared above.

1 answer

Your answer

Anonymous

2026-03-23T18:40:27.7166667+00:00

Connie,

There was a bug that was affecting send/receive and no sign in prompt. That bug just got fixed from the service. You should be able to restart Outlook to mitigate the issue. Here is the reference article, https://support.microsoft.com/en-us/office/users-get-errors-0x800ccc0e-0x800ccc0f-synchronizing-gmail-and-yahoo-accounts-in-classic-outlook-e5a7b684-7c5c-4848-ab2d-d48291451f67. It will be updated shortly to show as fixed.

For classic Outlook you should not need to use an App Password. Outlook uses OAuth which means you can use your regular password through browser sign in. If you changed your password, it will take Outlook an hour for the token to expire to prompt you for sign in. If you are not getting prompted to sign in you can use the workarounds in the article I shared above.

Answer 1

Based on the symptoms and timing, this matches the known issue where Gmail accounts suddenly stop working in classic Outlook even though IMAP tests and app passwords appear correct.

The root cause is that, during the Google sign‑in flow, the required Gmail permission for Microsoft apps was not fully granted, or Google’s authentication behavior changed and broke the existing consent. Classic Outlook then shows send/receive errors for Gmail even though tests pass.

Use these steps:

Confirm Outlook build and update
This issue is fixed starting with Current Channel Version 2412 Build 18324.20168.
Update Office 365 and confirm the version using the steps in About Office: What version of Office am I using?.
Use the Gmail “Retry” consent flow in classic Outlook
Once on the fixed build:
- Trigger a send/receive so the Gmail error appears.
- In the error window, select the Retry link.
- A browser window opens to Google sign‑in. Sign in to the affected Gmail account.
- When shown the permissions screen, make sure to check the option that allows Microsoft apps and services to:
  
  “Read, compose, send, and permanently delete all your email from Gmail.”
- Complete the sign‑in and return to Outlook, then run Send/Receive again.
This re-establishes the correct OAuth consent that Gmail now requires for Outlook to sync mail.
If Retry is not available or still fails
The article indicates that if the Retry solution does not work even on the fixed build, use the manual workaround (not fully detailed in the provided context). In that case, remove the affected Gmail accounts from the profile and re‑add them so the Google sign‑in and permission grant are repeated from scratch, ensuring the above permission is selected.

If, after this, send/receive still fails, follow the general Outlook connectivity checks (Work Offline toggle, internet connectivity, profile repair) from the “I can’t send or receive messages in Outlook” guidance, but the Gmail consent fix is the key step for this specific scenario.

References: