Block an Email Domain in a Microsoft Email Program
Microsoft’s email client makes it easy to block messages from a particular email address. Still, if you’re looking for a broader approach, you can stop getting messages from all email addresses that come from a specific domain. For example, if you’re getting spam emails from xyz@spam.net, you can easily set up a block for that one address. However, if you keep getting messages from others like abc@spam.net, spammer@spam.net, and noreply@spam.net, it’d be smarter to block all messages that come from the domain, “spam.net” in this case.
Tips on Blocking Email Domains
If you block large domains, such as Gmail.com and Outlook.com, among others, you will most likely stop getting emails from a large number of your contacts. You can remove a domain from the blocked senders list if you want to reverse what you’ve done by selecting what you’ve added and then clicking the Remove button to start getting emails from that domain again.