So your server is bombarded by spammer, and you really want to block them at the server side instead of per domain. Here is what I did, and it works for me. If you read this and it worked for you, or used this solution but tweaked it, please comment. Thank you !   Go to WHM / Service configuration / Exim Configuration Manager / Advanced Editor Scroll down to the big blue button “Add additional configuration settings”. In BOX1, enter: […]