This module makes it easy to allow users to Subscribe to an external (i.e. Non-DotNetNuke) mailing list. You simply add the module and then set the description and the send-to e-mail address. Users then enter their e-mail address and click subscribe. To see it in action goto: www.stlbikefed.org and then click on Join Our Email Lists.
Note: This is for external mailing lists (not supplied by DotNetNuke) where users subscribe by sending an e-mail to a specific e-mail address such as, email@example.com.