Hi @Alen_Erased
Welcome to our forum!
For better research, please provide more details about this case:
Does the problem occur in the Outlook desktop client?
Will all emails be delayed? Can you search for it in Outlook?
What's the version of your Outlook? (File > Office Account > About Outlook). Please make sure you have upgraded your Outlook to the latest version.
Here are a few steps you can take to identify and resolve the issue:
- Check Your Outbox: Sometimes emails get stuck in the Outbox. Make sure there are no unsent emails there.
- Internet Connection: Ensure you have a stable internet connection.
- Email Size and Attachments: Large attachments can sometimes cause issues. Try sending a smaller email to see if it goes through.
- Also, please try to check in OWA if the email is sent properly.
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