I am looking into starting a free webmail site and started looking around webmail server software. I came accross alot of paid programs for Windows but I am really looking for a Linux solution. Something with auto-signup(users choose between multiple types of accounts...paid or free), a nice interface and something that will handle a good number of users without slowdowns/crashes. My budget is pretty limited so something cheap(or free) is what I am looking for.
I believe SocketMail is the best choice. They are also throwing in the WAP module free at the moment. Their new skin is nice,kinda like gmail or yahoo, but nice. Now they have mail compression, mydocument and also 'tags' which is like gmail label.