How to block senders unwanted email addresses and domains in Outlook on the web

From Settings:

1. At the top of the page, select the gear icon to open settings and then select View all Outlook settings.
   

2. Select Mail > Junk email.

3. Under Blocked senders and domains, select Add.

4. Type the email address of domain that you want to block and press Enter.

5. Select Save.

**To unblock a sender, select the trash icon next to the email address or domain you want to unblock.