Mailman on Mac OS X Server Not Receiving Mail for Lists

When I created a few mailing list groups on my Mac OS X Server mailman using the Web Page admin at http://mail.haddon.k12.nj.us/mailman/admin - I am receiving emails from the server, but I am not able to send back to the mailing list.

Here is the error message I receive in the returned email:

A message (from ) was received at 5 Sep 2004 16:42:59 +0000.

The following addresses had delivery problems:


Permanent Failure: 550_:_User_unknown_in_local_recipient_table
Delivery last attempted at Sun, 5 Sep 2004 16:43:01 -0000

I found some information, that I am including below:
At Apple Discussions for Mail Services / Mailman, I found this discussion - http://discussions.info.apple.com/webx?14@@.6896bbc9 - that recommends a terminal command to resolve a domain name issue in mailman's configuration file.

I also found this kbase document:

"We hit a Bug" message when creating a Mailing List: http://docs.info.apple.com/article.html?artnum=107889
Mac OS X Server 10.3 includes a Web interface for mailing list administration. If you create a new mailing list with this tool, you may see a message that says, "We're sorry, we hit a bug!"

This Mailman interface is available at http://myserver.com/mailman/admin, where "myserver.com" would be replaced with the address of your server.

When you try to save a new mailing list, you see this message:

Bug in Mailman version 2.1.2

We're sorry, we hit a bug!

If you would like to help us identify the problem, please email a copy of this page to the webmaster for this site with a description of what happened. Thanks!

This message is followed by a detailed traceback.

To resolve the issue, follow these steps:
Open Terminal (/Applications/Utilities/).
Type: sudo chmod g+w /var/mailman/data/aliases.db
Press Return.
Use Server Admin to remove the partialy created list.