Microsoft 365 and Accounts
Email not sending or receiving
Check the queue, junk rules, and mailbox size before escalating a mail flow issue.
Help center
- Look in Outbox and Sent Items to confirm whether the message actually left.
- Check Junk Email and any rules that may be moving or deleting messages.
- Open the same mailbox at office.com. If mail flows there, the desktop profile needs repair.
- Note whether the problem affects one recipient, one domain, or everyone.
Forward any bounce-back message to your ticket. The delivery report tells us exactly where mail stopped.
Updated 2026-08-31