Blocking a sender prevents their messages from even reaching your Junk folder in most versions, sending them straight to the "Deleted Items" or rejecting them entirely.
Use Blocked Senders for individual nuisances, but don’t rely on it as your only email security layer. blocked email in outlook
Outlook and Exchange servers often block specific file types (like .exe , .zip , or .jar ) to prevent viruses. Blocking a sender prevents their messages from even
Locate the sender in the Blocked senders and domains list. Click the Trash can icon (or Remove button) next to their email address. Locate the sender in the Blocked senders and domains list
If your organization uses a shared IP address for email, it might have been blacklisted by spam databases (like Spamhaus or Barracuda) due to another user's poor email practices.
If you mistakenly blocked a contact, you can easily restore their access to your inbox.
Cause: Outlook has performance limits (~500-1000 entries). Fix: Use domain blocks (e.g., @yahoo.com ) to reduce entries, or switch to server-side rules.