main.cf:
local_transport = local:$myhostname
mydestination = $myhostname, mail.domain.org, lists.domain.org, localhost, localhost.localdomain, localhost.$myhostname, localhost.$mydomain
myhostname = name.domain.org
mail.domain.org is A record in my DNS for my server aka $myhostname. And mail.domain.org is my smtp and it's binded to virtual interface.
lists.domain.org is a CNAME record in my DNS that is virtual host for mailman. That all works for years...
grep '^local' /etc/postfix/master.cf
local unix - n n - - local