[Mailman-Users] failed to send out message when posting to a list

[Jana Nguyen]

Hi,

I'm using postfix with mailman and I can't post mail to the mailing list.
I can subscribe to a list, both I and the owner of the mailing list get 
an email notifications.  But I do not receive email when
posting to any of the mailing list that I created.

I've checked the duplication email option on the admin interface are 
unchecked.  Error message in /var/log/maillog:


Dec  3 16:44:25 portal spamd[2960]: prefork: child states: II
Dec  3 16:44:25 portal postfix/pipe[6362]: 95A5629A96: 
to=<jnguyen at ncmir.ucsd.edu>, relay=spamfilter, delay=1, status=sent (dummy)
Dec  3 16:44:25 portal postfix/qmgr[14320]: 95A5629A96: removed
Dec  3 16:44:25 portal postfix/pickup[14319]: 8C9A929B4D: uid=520 
from=<portal-bounces at nbirn.net>
Dec  3 16:44:25 portal postfix/cleanup[6361]: 8C9A929B4D: 
message-id=<mailman.0.1165193063.6124.portal at nbirn.net>
Dec  3 16:44:25 portal postfix/qmgr[14320]: 8C9A929B4D: 
from=<portal-bounces at nbirn.net>, size=2194, nrcpt=1 (queue active)
Dec  3 16:44:25 portal postfix/smtp[6370]: 8C9A929B4D: 
to=<jnguyen at ncmir.ucsd.edu>, relay=bigiron.ucsd.edu[132.239.131.209], 
delay=0, status=sent (250 ok:  Message 1826098 accepted)
Dec  3 16:44:25 portal postfix/qmgr[14320]: 8C9A929B4D: removed


I used to were able to post to list, but after I changed the 
DEFAULT_EMAIL_HOST to not to be the same as my DEFAULT_URL_HOST, it 
stopped working.
The entry in my /usr/local/mailman/Mailman is:

MTA = 'Postfix'

SMTPHOST = 'localhost'
SMTPPORT = 25
POSTFIX_ALIAS_CMD = '/usr/sbin/postalias'
POSTFIX_MAP_CMD = '/usr/sbin/postmap'

DEFAULT_EMAIL_HOST = 'nbirn.net'
DEFAULT_URL_HOST = 'portal.nbirn.net'

add_virtualhost(DEFAULT_URL_HOST, DEFAULT_EMAIL_HOST)