[Mailman-Users] problem with mailman handling incomming mail

[Maxime Longuepee]

Hi!

I have mailman installed on my freebsd server. I am running 
postfix+dovecot with mysql support for my mail server. Everything is 
working perfectly except mailman gives error on incomming mail. Here is 
the error (I replaced my real domain name in the error message with 
mydomain.org):

*This is the mail system at host mail.mydomain.org.

I'm sorry to have to inform you that your message could not be delivered to
one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can delete your own
text from the attached returned message.

                   The mail system

<"|/usr/local/mailman/mail/mailman post mailman"@mail.mydomain.org> (expanded
    from <mailman at mail.mydomain.org>): unknown user:
    "|/usr/local/mailman/mail/mailman post mailman"*




Can someone help me please!!

-- Maxime Longuepee