Outlook in Microsoft 365 receives email but can't send. Emails stuck in outbox.

David Lord 20 Reputation points
2026-08-03T04:44:36.09+00:00

Outlook in my 365 subscription receives emails but cannot send emails. I am using a Mac.

David Lord

Microsoft 365 and Office | Subscription, account, billing | Other | MacOS
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  1. David Lord 20 Reputation points
    2026-08-03T05:47:31.17+00:00

    Ramesh thanks for your proposed solution, I tried it but it did not work. Interestingly when I switch to Legacy outlook the problem disappears.

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  2. Ramesh Subedi 185 Reputation points
    2026-08-03T04:54:19.4766667+00:00

    Hi David,

    Have you tried signing out from Outlook and uninstalling the Outlook app and installing it again from the App Store, which should resolve the issue?

    Please let me know if this helps.

    Many thanks,

    Ramesh

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