Server issue on Outlook- not receiving some emails

Hi Susie O’Connor

I understand how frustrating it is when verification emails don’t arrive, especially when they’re needed to sign in quickly. Have you already tried the Q&A Assist suggestions? In addition, please try the following:

1, Check Safe Senders list

Automated emails can be silently filtered if the sender domain isn’t trusted.

• In Outlook.com, go to Settings > Mail > Junk email
• Under “Safe senders and domains”, manually add the domain sending the codes
• Select Save, then request a new verification email

2, Test using a temporary Outlook alias

This helps determine whether the issue is mailbox‑specific rather than device-related. Please follow this guide: Add or remove an email alias in Outlook.com and add a new Outlook.com alias. Try to use that alias to receive a verification email from the same service. If the alias receives the email but your primary address doesn’t, this points to filtering behavior on the original mailbox, not a device or browser issue.

If you’re experiencing loading issues with the toolbar when trying to access Get Help, you can follow the steps below to contact Microsoft Support if you need further assistance:

• Visit Contact Us - Microsoft Support 
• Select the product or service you're having issue with.
• Click Get Home Support
• Type a brief description of your issue in the search box.
• Click Get Help and select Contact Support below. 
• Go to the Products and services tab and choose the appropriate product.
• On the Category tab, choose the appropriate category or an alternative option.
• Go to Confirm.
• Look for and select "Chat with a support agent in your web browser" (during business hours) if available. Explain your situation clearly.

Please feel free to let me know how it goes. Thank you so much for your time and understanding.

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Follow these steps in Outlook.com to troubleshoot missing verification emails:

1. Confirm storage is not full
   • If Microsoft cloud storage is full, new mail (including verification codes) is bounced and unrecoverable.
   • Check mailbox storage using the storage link mentioned in the article and free space if needed.
2. Check Focused/Other, filters, and sort order
   • In Outlook.com, check both Focused and Other tabs.
   • Select Filter > Sort > Date to ensure messages are not appearing out of order.
   • Make sure no filters are hiding messages.
3. Check Junk Email settings and folder
   • Open Junk Email settings and verify that the senders or domains for these verification emails are not blocked.
   • Open the Junk Email folder and look for the missing verification messages.
   • If any are found, right‑click each and choose Mark as not junk to move them back to Inbox and train the filter.
4. Check rules and forwarding
   • Verify there is no email forwarding configured that could be sending these messages to another mailbox.
   • Check Rules and remove or edit any rule that might move or delete automated/verification emails.
5. Check connected apps / non‑Microsoft clients
   • If a third‑party mail app or client is used, it must support modern authentication and IMAP to sync correctly with Outlook services. See Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps.
   • If IMAP or POP are enabled and used by another app, they can sometimes interfere. Disable IMAP and POP and test again. See POP, IMAP, and SMTP settings for Outlook.com.
6. If only specific senders are affected
   • If a particular service’s verification emails never arrive and there is no error shown in Outlook.com, contact that service and ask them to follow Sender Support in Outlook.com so they can verify their sending configuration and reputation.
7. Use Outlook.com support if the problem persists
   • In Outlook.com, select Help on the menu bar, enter the issue, then scroll to Still need help? and choose Yes to contact support.
   • If sign‑in problems prevent access, use the dedicated sign‑in help link provided in the article.

If none of the above resolves the issue and storage is not full, use the interactive troubleshooter linked in the article to run through additional automated checks.

References:

• Can't send or receive email in Outlook.com