We are an ISP and we have several clients requesting a mailing
list. Often, the names collide. No problems with email addresses, we
know how to configure Postfix to have info(a)company.com and
info(a)npo.org point to different mailboxes.
But I cannot do the same with Mailman. Mailing lists are apparently
unique, whatever the domain is. So, I must create info-company and
info-npo and set a different host_name for each list. Not a big deal
except that this name appears in messages sent and
info-company(a)company.com is not really elegant.
I tried changing real_name. As its documentation said, it is
discouraged and, indeed, it does not work (the original name still
appears in messages).