I am trying to use phplist in a different server than the domain that I want to use it as a sender. Is is possible? 

To clarify my question: 

* my phplist is installed in example.com
* The domain that I want to use as sender is example1.com (in another
ip than phplist)

I would need some help on how I have to set up my dns settings in both servers.
(In phplist settings I use smtp credentials of info@example1.com)

Please let me know if I need to clarify something better.