How to block a spammer domain in exim configuration on cPanel Server? Print

If you notice one of the domains in your WHM installed server is doing some email spamming activities and you need to block his emails without suspending the account, you can follow these steps in your default Exim configuration.

1. Login to the server as root.
   
   
2. Create a new file:
   
   # vi /etc/eximblacklist
   
   You can add the problematic domain inside this file without quotes. Save the file after adding the domain(s).
   
   
3. Then we need to make some edits with the main Exim configuration file.
   
   # vi /etc/exim.conf


4. Add the following line in the first session just below the line 'cPanel Exim 4 Config'
   
   domainlist exim_blacklist = lsearch;/etc/eximblacklist


5. After that, add the following under 'Routers Configuration' section:

   reject_domains:
   driver = redirect
   # RBL Blacklist incoming hosts
   domains = +exim_blacklist
   allow_fail
   data = :fail: Connection rejected: SPAM source $domain is manually blacklisted.

6. Save the file and then restart the Exim service:
   
   # service exim restart

   
   If you are finding more domains doing the spamming activities, you can simply add the domain name to '/etc/eximblacklist' and no further changes needed.