Chipmunk Newsletter
A simple to use mailing list tools with features of double opt-in and double opt-out . Admin can delete emails or add emails and also includes a trackers to track which address emails have been sent so you can resume a timed-out send. The latest update lets you view and manage the subscriber list. In version 2.0, there is an integrated WYSIWYG editor and multiple mailing lists. The HTML email problem should have also been addressed.