Just thought I'd add that in addition to admin validated emails it also supports "double opt-in" subscriptions -- a user must validate their email address before the subscription is active. Also, you can integrate it with Links SQL if you are using Gossamer Community. Community users can pick which lists they would like to join.
Cheers,
Alex
--
Gossamer Threads Inc.
Cheers,
Alex
--
Gossamer Threads Inc.