Logged In: YES
user_id=201313

There is one. Not perfect, but...
check it on http://groundzero.xtremeoverclockers.com/index.php

PN Mailinglists
Description: So just what is this thing? PN Mailinglists is a fully featured mailing list manager based on the 452 Multi-MAIL. Some of those features include Socket based e-mail connections enable the script to handle _much_ larger lists than other PHP mailers which use the mail () function. We have though, provided a fall back to the mail() function in case you can't get the sockets to work. A MySQL backend keeps the rest of the script clicking along at high speed. Multiple lists can be created and users who sign up for more than one list will not receive duplicate mailings. You can have an unlimited number of lists and have the option of sending html formatted mail. Users can add, remove, and change their mailings without your assistance. Due to the socket base of the script, users can manage subscriptions through e-mail, similar to listserv.