Rating: 5 stars

This Plug in works as promised. Great support from the author.

Helpful hint for those that may come after later, be sure you have the correct URL for the ‘Mailman List URL’ which adds the subscribers to the list. For my host, it ended up being something similar to:
https://mylist.host.net/mailman/admin/mylistname/members/add

This plug in definitely works with WordPress 4.4.2 ??

Awesome!