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Email Issues Due to Being Blocked by RBL/Spamhaus/CBL

Stewart -

My emails are being blocked by RBL/Spamhaus/CBL.


  • On-Premise Server + WebMail Installations: Version 6.0 > Current Version

You may find yourself listed in RBLs like SpamHaus and CBL. The former lists "Listed in CBL" as a reason.


  1. Open up /etc/sysconfig/network
  2. Find this line.
  3. Change it so it reflects the main domain you have, or the hostname that your MX points to.
  4. Save changes, then execute the following in the command line.
    % hostname
  5. Restart Atmail services
    % /etc/init.d/atmailserver restart
  6. Afterwards, have your IP address delisted in the CBL.
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