MS Outlook 365 not able to send or receive emails

Dave Torode 20 Reputation points
2025-10-23T11:15:03.59+00:00

After MS outlook version 16.102.1 was installed on 20 October 2025 I cannot send or receive emails on my Mac. I have tried reinstalling outlook and using the legacy version but does not fix the problem.

Outlook | MacOS | New Outlook for Mac | For home
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Answer accepted by question author

Diane Poremsky 8,260 Reputation points Independent Advisor
2025-10-23T12:13:30.6533333+00:00

What type of email account do you have configured in Outlook? POP, IMAP, Outlook.com, or Microsoft Exchange?

Do you have any send and receive error messages? That would help identifying the problem.

Did you try removing the account from Outlook and adding it back? If asked to remove it from all devices, say yes. This removes the cached content from the Microsoft cloud servers, which is a frequent cause of sync issues.

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