Sign in to Outlook.com in a browser and check Settings → General → Storage first, because a full Microsoft cloud storage quota stops incoming mail and messages rejected while it was full cannot be recovered.^1^
1. Check storage
- Open Outlook.com and select Settings (gear icon).
- Go to General → Storage.
- If mailbox or Microsoft cloud storage is full, delete unneeded messages and files.
- Empty Deleted Items afterward so that the deleted mail no longer consumes mailbox space.
- Once space is available, send a new test message from another email account.
Messages sent while storage was full may have been returned to their senders and will not arrive later automatically.^1^
2. Remove settings that may redirect or hide mail
Because the Spam/Junk folder is already empty, move to these checks rather than checking it again:
- Settings → Mail → Rules: Disable or delete rules that move or delete incoming messages.
- Settings → Mail → Forwarding: Turn off forwarding unless it is intentional.
- Settings → Mail → Junk email: Review Blocked senders and domains and remove legitimate senders.
- In the message list, select Filter → All, followed by Filter → Sort → Date.
- Check Other, Deleted Items, Archive, and any custom folders. Rules, Sweep, Focused Inbox, or accidental archiving can move messages out of Inbox.^2^
If messages were deleted, open Deleted Items → Recover items deleted from this folder on a computer. Items removed from Deleted Items remain recoverable for up to 30 days.^2^
3. Run an external delivery test
Send a new message to the Outlook.com address from a different provider or ask someone to send one.
- Verify that the address is spelled correctly.
- Ask the sender whether they received a non-delivery report or bounce message.
- If only particular senders fail and no error appears, those senders may need to use Microsoft’s Sender Support process.^1^
- If the test appears on Outlook.com but not in an Outlook app, the mailbox is receiving mail and the remaining issue is app synchronization. If POP or IMAP is enabled for a connected application, Microsoft recommends disabling it and testing again.^1^
4. Check account and service status
The public Microsoft status page currently does not indicate a broad service outage, but check it again when testing because conditions can change.^3^
If the password was changed recently or Microsoft detected unusual activity, the account may require verification or unblocking. Also review the Microsoft account’s Recent activity page if there are unfamiliar sign-ins; unauthorized access can result in rules or forwarding being added.^2^
5. Escalate if the external test never arrives
If storage is available, no rule or forwarding setting redirects mail, and a new external test does not appear in any folder:
- In Outlook.com, select Help on the menu bar.
- Search for cannot receive emails.
- Scroll to Still need help? and select Yes.
- Choose the available option to chat with a support agent.
- Provide the approximate date delivery stopped, affected sender domains, test timestamps, and any non-delivery error text. Do not post complete email addresses publicly.
Microsoft Support can investigate mailbox-side delivery records that cannot be accessed through public Q&A.^1^
References
- Can't send or receive email in Outlook.com | Microsoft Support
- Email is missing from your Outlook.com inbox | Microsoft Support
- Microsoft service health status