Does anyone have a recommendation for reliable, professional email hosting?
I want to be able to administer an an arbitrary number of clients' email accounts on the hosted server. POP and SMTP access should be available, with a decent Webmail option, and preferably some kind of trainable Spam filter (Spam Assassin, etc).
Each user should be able to authenticate outgoing emails with a password for the server's SMTP. The SMTP authentication would not depend on the specific IP address of the user.
Control panel access should be available to each user to manage their account, with simple options for redirection, mail groups, auto-responders, etc. An overall, administrative control panel would be there, to manage the user accounts.
An economical package would suit nicely!
Any suggestions gratefully received...