Using New Outlook on Windows for personal email, calendar, and contact management
Hi Paul,
Thanks for reaching out. I understand how frustrating it is when you can’t block unwanted emails in Outlook it’s a common issue for many users. Blocking normally moves messages from that sender to your Junk Email folder, but if it’s not working, there are a few reasons why.
This can happen if you’re using the new Outlook with third-party accounts like Gmail or Yahoo, because blocking is only supported for Microsoft accounts. It may also fail if the sender uses changing or spoofed addresses, or if there’s a temporary bug after an update. In some cases, cached browser data or misconfigured junk mail settings can interfere.
To fix this, check your Outlook version and go to Settings > Mail > Junk Email (or Home > Junk > Block Sender in classic Outlook) to add the address or domain to your blocked list. If blocking still doesn’t work, create a rule to move those emails to Junk or Deleted Items. Clearing cache or updating Outlook can also help. For persistent issues, try blocking via Outlook on the web or contact Microsoft Support.
I hope you find this information helpful. Please let me know if you have any further questions If the answer is helpful, please click "Accept Answer".
Regards,
Carlo