[Mailman-Users] an alternative smtp server?

[Zbigniew Szalbot]

Hello,

I have two machines on my LAN both with the same domain name. Mailman is
installed on machine A but for actual SMTP mailman work I would like to
use machine B (as machine A is a bit stressed with other tasks). I cannot
use the domain entered in the general settings for a list (because smtp
servers on both machines have the same domian). Is it possible to specify 
a LAN address of machine B so that mailman uses this machine for all of
its operations? Bounces and all other requests would come to machine A
anyway as this is defined at the router level.

Thank you very much in advance!

-- 
Zbigniew Szalbot