Add email to Blocklist in Barracuda Spam Firewall

Adding Email Address or Domain to the Blocklist

  1. Login to the Barracuda with your email address and email password.
  2. Select the PREFERENCES tab at the top, and select the sub menu Whitelist/Blocklist.
  3. Under Blocked Email Addresses and Domains (Blocklist), type the email address or domain name.
  4. Click Add.
  5. If needed, repeat to add additional entries.


  • If you enter a full email address, such as, just that user is specified. If you enter just a domain, such as, all users in that domain are specified.
  • If you enter a domain such as, all sub domains are also included, such as and
  • Mass mailings often come from domains that do not resemble the company’s web site name. For example, you may want to receive mailings from, but you will find that this site sends out its mailing from the domain You need to look at the From: address of an actual mailing that you are trying to Whitelist or Blacklist to determine what to enter.