I couldn't find a good way to get a complete Mailman email list off of a hosted server, so I wrote this PHP script that will list the members of your email list so you can cut and paste and save for backup purposes.  Unlike other backup tools, this one does not require root or shell access.  It only requires you to know the admin password for your list.

PLEASE NOTE:  Lists that have more than one screenful for a given letter will not be backed up fully by this script.  The script needs to be modified to traverse the subpages under a letter for large lists.  Any volunteers?

Run the Mailman backup PHP script to backup your own Mailman list

View the Mailman backup PHP script and put on your own system

Sample output:

Member List of http://mydomain.com/mailman/admin/mylist_mydomain.com/

me@mydomain.com
you@yourdomain.com

Number of email addresses in this list = 2