Thought I'd put my two cents in. I've got Gossamer Mail, and the program seems to be great. Although, I found the current version is missing a few, what I consider necessities, if you're opening it up for public use. The new version which they're working on at the moment I believe will address these and make it fantastic! I've had the software for about 4 or 5 months, but have decided to basically stick it in the bin till the new release comes out - so as you can imagine I'm hanging out for it to be released.

What I found missing was...

1. An easy way for the admin to add 'reserved' mail user names - I've got quite a large list I want to reserve.
2. An automated password reminder mod for the users - without it you could be receiving a lot of time consuming emails.
3. A non-frame version of the templates (I'm not really too worried about this one).
4. A way to email users, if it could be similar to the way LinksSQL works, ie. Email users based on a menu selection from their registration information or other collected information.
5. An easy way to select or add/remove new fields in the user registration form. If you've seen the AdvertPRO affilliate plugin manager works you'll know what I mean. You can basically just click on/off a selection of checkboxes for the fields you want displayed on the signup form.

Thats all I can think of now. I'm expecting the next version will be great and recommend it.

Cheers,

Regan.