Powerful and easy to use.

This is a really powerful, feature-rich, and easy to use plugin for managing multiple mailing lists.

The most useful feature to me is the grouping of users, which you can think of as user roles. Mailing list members can be derived from any combination of grouped users, or ad-hoc direct additions to the mailing lists. Users can be added from your existing registered WP Users list, or as separately managed WP Mailster Users who only have mailing list privileges.

There are many many nice touches, like available widgets for subscribe and unsubscribe, and short codes for users to self-manage their subscriptions, and for viewing archived e-mails.

It’s really slick! I highly recommend this plugin!