Blacklisting Senders in Professional Spam Filter

Any sender on this list will automatically have their email rejected and sent back with a 5## SMTP error.

  1. Log into your Spamfilter dashboard.
     
  2.  

    Click on the Sender blacklist icon.

     
  3.  

    Find the Sender blacklist section and enter either a single domain name (john.doe@example.com), an entire domain (example.com) or an entire TLD (*.com) to blacklist in the Sender field.

     
  4.  

    Click on the Add button.


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