It was developed in 1994 by Ipswitch, Inc., a software company based in Lexington, Massachusetts.
Additional features include collaboration for Outlook data, Commtouch anti-spam, anti-virus protection powered by BitDefender, email archiving, instant messaging and solutions for installing IMail on a hosted server.
IMail Server licenses are available in packages for 10, 25, 100, 250, 500, 1000, 2500 and unlimited number of users.
Any standards-based client including Microsoft Outlook, Outlook Express, Mozilla Thunderbird, Eudora, IMail Server’s web client, and all mobile devices supported by Microsoft Exchange ActiveSync including the iPhone.
IMail can handle as many as 300,000 users, with an average message flow of ~25 per second / ~2 million a day.