Missing mails in account

Check Outlook.com on the web for the missing messages, mailbox filtering, and available storage before requesting more OTPs; Microsoft currently reports an Exchange Online mail-delivery delay, although it has not confirmed that consumer Outlook.com OTP delivery is affected.^1^

Since restarting and resetting did not help, use these server-side checks instead:

1. Find messages hidden from the Inbox

1. Sign in to Outlook.com in a browser.
2. Confirm that the masked destination address displayed by the app requesting the OTP matches this mailbox.
3. Search All folders for the app/service name, OTP, verification, and code.
4. Check:
   • Junk Email
   • Other, if Focused Inbox is enabled
   • Deleted Items
   • Any archive or custom folders
5. Select Filter → Sort → Date to show the newest messages correctly.
6. Open Settings → Mail and inspect:
   • Rules: disable any rule that deletes, redirects, or moves matching messages.
   • Forwarding: disable unexpected forwarding.
   • Junk email: check blocked senders and add the legitimate sender or domain to safe senders.

These are Microsoft’s recommended checks when Outlook.com is not receiving a specific message.^2^

Messages in Junk are automatically removed after 30 days and cannot be recovered. If you find the OTP there, select Report → Not junk.^3^

2. Check whether the mailbox can receive anything

Send a normal test email from an unrelated account.

• If normal mail and OTPs from several unrelated services are missing: check Outlook.com storage. When Microsoft cloud storage is full, Outlook.com cannot receive mail; messages sent while it was full are rejected and cannot be recovered. Free space, then ask senders to send new messages.^2^
• If only one app’s OTP is missing: contact that app’s support. Ask them to confirm the destination address and check their delivery log or bounce response. Outlook.com guidance specifically recommends contacting the sender when one particular email is missing.^2^
• If POP or IMAP is enabled for a connected mail app: temporarily disable POP/IMAP, then send another test message. This isolates whether a connected client is downloading, moving, deleting, or failing to synchronize messages.^2^

Also check Microsoft’s service-health page before making further requests.^4^

3. If Microsoft is sending the verification code

This section applies only to Microsoft account codes—not OTPs generated by another app:

• Search Junk for mail from @accountprotection.microsoft.com, then add that domain as a trusted sender.
• Stop requesting more codes. Repeated Microsoft verification requests can trigger a temporary block. Microsoft recommends waiting at least a day and, if necessary, longer—up to one week—without repeated attempts.^5^
• If offered, select another verification method connected to the account.
• If Microsoft sends the code to another Outlook.com, Hotmail, Live, or MSN mailbox, keep the requesting page open. Open a separate InPrivate window with Ctrl+Shift+P, sign in to the alternate mailbox there, retrieve the code, and return to the first window.^5^

For a third-party app, its cooldown rules may differ; stop requesting codes briefly and follow that provider’s documented recovery or support process.

4. Escalate if all incoming mail remains affected

If storage is available, no rule or forwarding setting explains the problem, and mail from multiple unrelated senders still fails, open Outlook.com, select ? → Help, and use Contact Support. Include the approximate send times, sender domains, and any bounce/error text reported by senders.

References

1. Microsoft Admin Center Status
2. Can't send or receive email in Outlook.com | Microsoft Support
3. Email is missing from your Outlook.com inbox | Microsoft Support
4. Microsoft service health status
5. Troubleshoot Microsoft verification code issues | Microsoft Support