ZIMBRA E-MAIL SERVER :
Zimbra Collaboration Server is an enterprise-class open source email, calendar and collaboration server. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
Other key advantages include advanced compatibility with existing desktop email clients, over-the-air sync to smartphones (iPhone, Android, BlackBerry) as well as better server scalability and more efficient administration.
Zimbra Collaboration Server is the most capable open source email and collaboration suite available today. Far outstripping what is possible with simple open source mail servers, Zimbra provides organizations major productivity boosts with global address lists, shared calendars and document management on the web or offline with Zimbra Desktop. Support for standard protocols enables use of virtually any desktop client or device for added end user flexibility.