[Mailman-Users] mailman problem

[training]

I set up mailman and its web front, everything looks fine, except when I 
send a test email to my list alias, there
is no email in the pending list

mydomain is also my list name, and in my /etc/passwd I do have a user named
mydomain

qrunner log:
Apr 22 22:20:56 2004 (9731) post to mydomain from 
mydomain-request at mydomain.com <mailto:mydomain-request at mydomain.com>, 
size=1701, 
message-id=<mailman.10.1082231387.21812.mydomain at mydomain.com>, 1 failures

smtp log:

Apr 22 22:20:56 2004 (9731) 
<mailman.10.1082231387.21812.mydomain at mydomain.com>
smtp for 1 recips, completed in 189.191 seconds

smtp-failure log:

Apr 22 22:20:56 2004 (9731) Low level smtp error: (110, 'Connection 
timed out'), msgid: <mailman.10.1082231387.21812.mydomain at mydomain.com>
Apr 22 22:20:56 2004 (9731) delivery to info at test_domain.com failed with 
code -1: (110, 'Connection timed out')

What is the problem here?

Thx,HTM