Outlook mailbox cannot send email — messages stuck in Sent Items

Question

My Outlook mailbox appears to be only partially provisioned. I can receive emails but cannot send any. Messages move to Sent Items but never leave the server. This has been ongoing for over 36 hours. Please escalate to the Outlook mailbox provisioning team

Answer 1

Hello

Since this also happens in Outlook.com on the web, it is unlikely to be a local Outlook problem. If messages appear in Sent Items but are never delivered, this may be an account-level or server-side mail-flow issue.

First, check that your Microsoft mailbox/cloud storage is not full:

https://support.microsoft.com/en-us/outlook/can-t-send-or-receive-email-in-outlook-com

Then try sending a simple email with no attachment to yourself and to another provider such as Gmail.