One of my contact's e-mails are blocked on Outlook.com. Previously they were marked as "Unverified"

Dave Gadberry 20 Reputation points
2025-07-30T20:38:10.6166667+00:00

One of my contact's is blocked on my Outlook.com. His e-mails previously were marked as "Unverified". Now they don't come in at all.

I added his e-mail to my Safe Senders list but they still don't come in.

What can I do?

Outlook | Web | Outlook.com | Email
0 comments
Answer accepted by question author
Jeronimo Fuerte 47,705 Reputation points Independent Advisor
2025-07-30T23:17:24.1233333+00:00

Hi! Outlook.com does a first-pass check at the moment the sending server tries to hand the message to Microsoft’s servers.

If the domain in the “From:” header does not pass all three modern authentication tests Microsoft can refuse the mail, in this case the sender should see a 550 5.7.515 or similar rejection with a link to Microsoft’s guidance. The diagnostic string tells them exactly which check failed.

The fix lives on the sender’s mail server or DNS, not in your mailbox. Once the sender’s safety settings are correct, delivery to your Inbox should resume immediately.

Was this answer helpful?

0 comments

0 additional answers

Sort by: Most helpful
Most helpful Newest Oldest

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.