Zoho Mail - Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
FastMail - Email, calendars, and contacts to highest standards of security, privacy and reliability.
Intradyn Email Archiver - Orca Email Archiver provides email archiving solution for local government and business.
Rackspace Email Hosting - Rackspace Email Hosting is a platform that provides business with web-hosted email services.
Hornetsecurity Email Archiving - Hornetsecurity Email Archiving is one of the advanced software that offers long-term, unchangeable, and secure storage of important company information, data, and flies.