Our company is looking to upgrade their e-mail server we are running Exchange 5.5. We need a program that will fit our needs better we do email for 350-500 domains with 2-170 users per domain. We need something that has a web email interface and of course pop3 and IMAP. There also has to be a way for us to have a global admin and a way for there to be a domain admin so our customers can add users and make changes without calling us all the time. But a way for use to if they need us to. We are looking for something that is supported and widely used. We are looking at SmarterMail right now Any suggestions or comments welcome. Thank you in advanced.