Here is a collection of mailing list resources, hosts and tools

Listbot.com

Listhost.net

Lyris List Server

Sparklist.com

Free Mailing List Hosts

eCircles.com
eGroups.com
globelists.com
ListBot.com
Milo.com
ONElist.com
Zinester


Mailing List Directories and Resources

Email Publishing at writerswrite.com

Ezine-Tips.com

Fidget.com

List-Universe.com

List-Resources.com

Liszt.com

NetterWeb.com