HyperOffice Email Service
HyperOffices is a Microsoft Exchange alternative with all the messaging features growing business need - custom business email; Outlook email; shared Outlook contacts...
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
Exchange is a groupware server designed to work with Microsoft Outlook, and providing features such as a messaging server, shared calendars, contact databases, public folders, notes and tasks.
OpenChange server doesn't need any plugin installation in Outlook.
outlook exchange mail-server