Imagine you are seeing a lot of Spam mails originating from a domain say in your server logs. We can blacklist the domain from sending mails through Exim mail server.

Create a file named /etc/eximblacklist and add the entry "" (without quotes). That is, add the domains you need to blacklist one per line.

Now go to WHM >> Exim configuration editor >> Advanced Editor.

Add the below lines in the first section just below the line "#!!# cPanel Exim 4 Config"

domainlist exim_blacklist = lsearch;/etc/eximblacklist

Now add inside the section under "ROUTERS CONFIGURATION "


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

Save the configuration and see the exim error log. You can see the domain blocked.