Thanks for your response.
Yes, it's a CPanel item > Email > Mailing lists
The mailing lists available are all Mailman lists. Mailman's a very good Open Source program with almost no documentation available from program's creator.
What I'm looking for is what I will substitute to replace the actual base URL which is currently:
http://host2.indyserv.net/mailman/
I'm asking if having a custom nameserver to put in this address will help me?