If an exim upgrade fails use the following to force a fresh upgrade of exim and then check the exim system status
/scripts/eximup –force
service exim status

How to Enable RBL’s in Exim via CPanel/WHM:

The WHM now allows you to enable Spamhaus (zen.spamhaus.org) and SpamCop via the WHM

Login to the WHM

Click Exim Configuration Editor

Check both RBL’s

Save your settings

This entry has been created under the Exim category.