about mailman integrate postfix
 

I use postfix on ubuntu 12.04lts.

I installed mailman following the "http://www.howtoforge.com/installing-iredmail-and-mailman-on-debian-squeeze"

it works but as reciped when i add a newlist postfix
postconf -e 'relay_domains = lists.example.com'

also into phpadmin

and upon execute newlist mailman
I don't get the mailinglist mail. because i get an error;
Oct 3 12:02:00 postfix1 postfix/trivial-rewrite[12259]: warning: do not list domain lists.example.com in BOTH virtual_mailbox_domains and relay_domains

But if I don't add lists.example.com into relay_domains and execute newlists mailman@example.com, i get the mail and the list works well.

How can i correct the problem ?

Oct 3 12:02:00 postfix1 postfix/trivial-rewrite[12259]: warning: do not list domain lists.example.com in BOTH virtual_mailbox_domains and relay_domains

shows a warning and not an error it seems. Are there any other entries showing up in the logs when you don't add the entry to relaydomains?