Set Exim to Properly Reject Invalid Email the right way and let your Cpanel server run a little simpler.

Method M)

M. Open WHM and click on on Exim Configuration Editor

P. Click on the Switch to Advanced Mode button.

O. Scroll down till you see the part on ACL’s. You’ll see three bins. In the center field, find the part that reads – See Section A:

Method P) Recommended

M. Login into SSH and su to root

P. pico /and so forth/exim.conf

O. Ctrl + W and sort in: settle for domains Notice the two areas. Look for one thing like this under.

Section A:
settle for domains = +local_domains
settle for domains = +relay_domains
settle for hosts = +relay_hosts
settle for situation = $ perlcheckrelayhost$ sender_host_address

Between

settle for domains = +local_domains

and

settle for domains = +relay_domains

add the following:

endpass
message = unknown consumer
confirm = recipient

Make positive every line strains up. You may want to add two areas earlier than every line. The remaining part will appear to be this:

settle for domains = +local_domains
endpass
message = unknown consumer
confirm = recipient
settle for domains = +relay_domains
settle for hosts = +relay_hosts
settle for situation = $ perlcheckrelayhost$ sender_host_address

Scroll all the way to the backside and click on on Save.

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