Greetings. I'm the administrator for a regional non-profit. We've begun to grow beyond using Googlegroups, Yahoo groups, GroupSpaces, and the like for our listservs, which are used both to send out news and for discussion. Suggestions of specific programs to check out would be most welcome. Here are the features I'm looking for:


Direct add members
Bulk import/export of members
Bulk delete of members
Members can post
The ability to not allow self-subscribing
Archive messages
Support for attachments
Bounce management would be nice
Doesn't require having my own host
Low cost or free