[Mailman-Users] Problem with Postfix + Mailman, "unresolved" aliases...

[Emilio Giulio Orsenigo]

Hi all, i have a problem with my installation of Mailman on Postfix;
That's the first time i try to install Mailman, so i've read all of the 
archives and FAQ's before deciding to post on this mailing list :(

The (weird) problem is simply this one: my postfix authenticate against a 
MySQL database, and there are the aliases too. Mailman had his own aliases 
file, to keep in synchro with postfix. I've configured Mailman (i think it 
is ok) so when i wrote to [list-name][at][domain] the MTA catch correctly 
the alias [list-name] in the aliases file. Now comes the trouble: the alias 
is in this form:

pippo:             "|/usr/local/mailman/mail/mailman post pippo"
[others follows]

where "pippo" is the list name.

So, i don't get mail delivered, and in the postfix logs i read:

Apr  3 18:53:22 firewall postfix/local[31956]: D27286D464: 
to=<|/usr/local/mailman/mail/mailman post pippo at ubris.org>, 
orig_to=<pippo at ubris.org>, relay=local, delay=0, status=bounced (unknown 
user: "|/usr/local/mailman/mail/mailman post pippo")

just like it was searching a user called "|/usr/local/...blabla" !!!

And the thing i can't understand is that if i from the shell do:

# su postfix
# echo "[fake-mail with headers]" | /usr/local/mailman/mail/mailman post 
pippo at ubris.org

i got the mail perfectly delivered to all subscribers of pippo at ubris.org, 
being pippo at ubris.org the mailing list in question.

It seems that there are some problem for postfix (or mailman? uh?) to 
"resolve" the instruction piped in the alias... please, help me, i'm going 
crazy about this.

Thx in advance

Emilio

P.s. - i'm sorry for my surely-not-perfect english, i hope that it is 
anyway understandable... :P