[Mailman-Users] Some beginner questions

[Defryn, Guy]

Hi guys,

I have mailman running in a basic configuration now and all seems to
work.

I'd like to change the way the email address appears.

We have a naming standard for our computers as follows e.g.
IT012345.mydomain.com
I have created an alias in the DNS called lists.mydomain.com

I post my message to mailman at lists.mydomain.com
and it arrives fine.

The sender appears to be mailman-bounces at it012345.mydomain.com
and the recipient appears to be mailman at it012345.mydomain.com

Question is how can I change IT012345 with lists?
My mm_cfg.py file and postfix main.cf file point to lists.mydomain.com

Also why does the sender appears to be mailman-bounces and not just
mailman?
Can this be changed too?

Cheers