One of the results this will return is Exim Configuration Editor, this is the option you should choose.
Toward the bottom of this editor there will be a RBL section. Simply click the checkbox next to each of the options, bl.spamcop.net and zen.spamhaus.org, and then click on save to force the changes to take effect.
Enabling these RBL’s will not completely stop the flow of spam, but should be able to put a sizable dent in it.=== Liquid Web’s Heroic Support is always available to assist customers with this or any other issue. If you need our assistance please contact us: Toll Free 1.800.580.4985 International 517.322.0434 firstname.lastname@example.org