Turning off execution of "Mail delivery failed: returning message to sender" in exim

My mail server receives tons of messages directed towards bogus, non-existant addresses at my domain. When those addresses don’t exist, it creates a reply email with the subject “Mail delivery failed: returning message to sender”. How do I stop exim from doing this?

Try to take a look on your scripts, if any code overflowing and cronjob massacre. Make sure about exploding. Update all your 3rd party software / packages ASAP.

To Stop exim :

From WHM / service you can stop exim Or if you have SSH access then run a command "service exim stop ".