Tweaks to prevent Spamming on cPanel server.

Setting in – Exim Configuration Manager

1. Login to WHM control panel by using root user

2. Goto Main >> Service Configuration >> Exim Configuration Manager

3. Enable RBL filtering by Basic Editor >> RBLs >> switch to – On and if you like you may additional RBL from manage option.

4. Sender Verification Callouts = ON

5. Sender Verification = ON

5. Reject SPF failures =ON

6. Then save all the configuration this will stop most of spams in the server.

Then go on tweak setting to modify some setting:

1. Login to WHM control panel by using root user

2. Goto Main >> Server Configuration >> Tweak Settings

3. Initial default/catch-all forwarder destination = Fail

4. Max hourly emails per domain = 200

5. Count mailman deliveries towards a domain