How to Block an Email Domain in macOS 13 Mail

While the Mail app on macOS 13 Ventura allows you to block individual email addresses directly, it does not offer a single-click button to block an entire domain. However, you can effectively block any specific email domain by setting up a custom Mail rule. This method automatically catches any incoming message from the specified domain and moves it immediately to your Trash or Junk folder, preventing unwanted emails from ever reaching your inbox.

Step-by-Step: Block an Email Domain Using Rules

  1. Open Mail Settings: Launch the Mail app on your Mac, click Mail in the top menu bar, and select Settings (or press Command + ,).
  2. Access Rules: Click the Rules tab at the top right of the settings window.
  3. Add a New Rule: Click the Add Rule button on the right side.
  4. Name the Rule: Give your rule a recognizable description, such as "Block Domain: example.com".
  5. Set the Condition:
    • In the first drop-down menu, leave the condition set to From.
    • In the second drop-down menu, change "contains" to ends with.
    • In the text box, enter the domain name you want to block (for example, @spamdomain.com or simply spamdomain.com).
  6. Set the Action:
    • Under "Perform the following actions:", ensure the first drop-down is set to Move Message.
    • Set the destination folder to Trash (or Bin) to automatically delete them, or choose Junk if you want to review them later.
  7. Save the Rule: Click OK.
  8. Apply to Current Mailbox: A prompt will ask if you want to apply the new rule to messages in your open mailboxes. Click Apply to clear out existing emails from that domain.

Managing Blocked Domains

If you need to add more domains later, you do not need to create a new rule for each one:

  • Open Mail > Settings > Rules.
  • Select your domain-blocking rule and click Edit.
  • Click the + (plus) icon next to the existing condition to add another line.
  • Ensure the top condition setting is set to If any of the following conditions are met.
  • Add the next domain using the From > ends with format and click OK.

Alternative: Server-Level Domain Blocking

If you use email providers like iCloud, Gmail, Outlook, or Yahoo, setting up domain blocks directly in the webmail interface of your provider will block the domains before the emails ever reach the macOS Mail app on any of your devices.