not receiving emails

Question

I have not received emails to my business email address for 3 days. My personal email address is receiving emails.

Answer 1

Follow these checks step by step for the business mailbox that stopped receiving mail:

1. Confirm the account itself works

• Sign in to Outlook on the web/OWA for the business account.
• If sign-in fails or Outlook on the web shows errors like 404 or fails to load the mailbox, the mailbox may be disabled. In that case, the Microsoft 365/Exchange Online tenant admin must:
  • Check whether the mailbox is disabled.
  • Re‑enable the mailbox if AccountDisabled is True.
  • After re‑enable, try Outlook on the web again.

2. Check that Outlook is online and connected (on the Windows device)

• In Outlook for Windows, ensure it is not set to Work Offline (for classic Outlook this is on the Send/Receive tab; in New Outlook verify status shows as Connected).
• If using an Exchange account in Outlook for Mac or another client, verify the account shows as connected and not with an orange/failed status in Tools → Accounts.

3. Verify the mailbox is not full

• If this business account is backed by Microsoft cloud storage, a full mailbox/storage will prevent receiving email and messages will bounce and be unrecoverable.
• Check mailbox storage using the storage page linked from the Outlook.com guidance and free up space if needed.

4. Check junk, filters, and rules

• In Outlook/OWA for the business account:
  • Check the Junk Email folder and Junk Email settings. If valid messages are there, right‑click and choose Mark as not junk so they return to Inbox.
  • Check the Other tab (Focused/Other) and any filters on the message list (e.g., date, unread) that might hide recent mail.
  • Review rules to ensure no rule is diverting new mail to unexpected folders (for example, to RSS Feeds or other folders). Remove or disable any rule that moves all new mail away from Inbox.

5. Check blocked senders and safe senders

• In Outlook on the web for the business account:
  • Go to Settings → Options/Mail → Blocked Senders or Block and allow.
  • Remove any legitimate senders or domains from the blocked list.
• In Outlook desktop (if using classic Outlook):
  • Home → Junk → Junk Email Options → Blocked Senders and remove any legitimate addresses or domains.

6. Check forwarding and connected apps

• In Outlook on the web for the business account, verify:
  • No forwarding is configured that sends all mail to another address.
  • No rule is deleting or permanently moving messages.
• If the business mailbox is also configured in other apps (mobile, third‑party clients):
  • Ensure they support modern authentication and IMAP if applicable.
  • If IMAP/POP are enabled and causing issues with a connected app, disable IMAP/POP as suggested in the Outlook.com guidance and test again.

7. If only one device is affected

• If mail appears in Outlook on the web but not in Outlook on Windows, remove and re‑add the account/profile on that device so it re‑syncs from the server.
• For mobile devices paired with the mailbox, removing the device partnership from the mailbox (per the Outlook.com sync guidance) can resolve sync issues.

8. If the mailbox appears disabled or still does not receive mail

• Contact the Microsoft 365/Exchange Online tenant administrator:
  • Ask them to verify the mailbox is enabled and licensed.
  • If OWA error logs show AccountDisabled : True or similar, they must re‑enable the mailbox and then have the user sign in again.

If personal email is working but the business mailbox is not, focus checks on the business account’s mailbox status (enabled vs disabled), storage, rules/forwarding, and Outlook connectivity.

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References:

• Can't send or receive email in Outlook.com
• Where are my email messages or calendar events in Mail and Calendar for Windows 10?
• I can't send or receive messages with Outlook for Mac
• I'm not receiving email or other items in my Exchange account in Outlook for Mac
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