The mailing list for listmasters using Sympa

[<address@concealed>]

Hi,

I am trying to get Postfix working with Sympa.

Stuff like subscription and posting to lists from the web interface are
working fine.

However, when I send a mail to any list the mail does not get delivered.
The response I get is:

-----------------------------------------------------------------------
Reporting-MTA: dns; mail.mydomain.net
X-Postfix-Queue-ID: 0594D6888043
X-Postfix-Sender: rfc822; address@concealed
Arrival-Date: Wed,  7 Nov 2007 13:27:28 +0530 (IST)

Final-Recipient: rfc822; address@concealed
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host lists.mydomain.net[xxx.xxx.xxx.xxx] said: 550
    5.1.1 <address@concealed>: Recipient address rejected: User
unknown
    in local recipient table (in reply to RCPT TO command)

-----------------------------------------------------------------------

Any solutions?

Cheers!
Kapil