[Mailman-Users] return to sender error

[doyle]

I just installed the latest mailman from ports on FreeBSD running Postfix.
I setup a test list but anytime I send mail to it, it gets bounced with
the error unknown user "test"

May 16 12:59:56 watchdog postfix/local[9674]: CE86FCEBF:
to=<test at watchdog.sytes.net>, relay=local, delay=1, status=bounced
(unknown user: "test")

I have updated my alias file and set my crons.  My permissions are set
correctly too.  Do I need to adduser for each mailing list name i create?

- Adam