How to Block Emails From a Specific Domain

Steps for Outlook, Windows Mail, Windows Live Mail, and Outlook Express

What to Know

  • In Outlook, go to Junk > Junk E-Mail Options > Blocked Senders > Add > enter the domain > Add.
  • Mail for Windows 10 does not come with its own spam filter but relies on the email service settings.

This article explains how to block a domain in Outlook for Microsoft 365, Outlook 2019, 2016, 2013, and 2010.

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, you can easily set up a block for that one address. However, if you keep getting messages from others like,, and, it'd be smarter to block all messages that come from the domain, "" in this case.

  1. From the Home ribbon menu, choose the Junk option in the Delete group and then Junk E-Mail Options.

    Junk button on Outlook Home tab
  2. Open the Blocked Senders tab.

    Blocked Senders tab of Outlook Junk Mail Options dialog
  3. Select the Add button.

    Add button on Blocked Senders tab of Outlook Junk Email Options
  4. Enter the domain name to block. You can type it with the @ like or without it, such as

    Do not enter multiple domains in the same text box. To add more than one, save the one you just entered and then use the Add button again.

    Add address or domain box in Outlook Junk Mail Settings dialog
  5. Select OK to add the domain and select OK again to close the dialog.

Tips on Blocking Email Domains

If you block large domains, such as and, 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.

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