SmarterMail Mail Server is described as 'SmarterMail is the only other email server on the market with native support for MAPI, the protocol that powers Exchange and Outlook. That means anything you can do on Exchange you can do with SmarterMail: no plug-ins and no additional software required' and is a Mail Server in the office & productivity category. There are more than 10 alternatives to SmarterMail Mail Server for a variety of platforms, including Windows, Linux, Mac, Web-based and Self-Hosted apps. The best SmarterMail Mail Server alternative is hMail Server, which is both free and Open Source. Other great apps like SmarterMail Mail Server are Microsoft Exchange, Axigen, OpenChange and Citadel.