Send the following command as the body of an email to your LIST REQUEST ADDRESS to see everyone who is on your mailing list. The roster is limited to list members only, and you must supply your admin password to retrieve it.

Your list request address (found in your listmail headers) is typically

yourlistname-request@yourdomainname.com

The simplest format would be to send from your admin address without brackets or modifiers; if your password is banana, simply send one line reading:
who banana

This won’t preserve your other settings, but it’s a great start when you’re trying to reconstitute a list!