Zimbra Collaboration Server
Zimbra is an enterprise-class email, calendar and collaboration solutions, built for the cloud, both published and private. In addition, it offers the most innovative messaging experience available today, connecting users to information and activities in their personal cloud.
Built on the power of VMware virtualization and cloud expertise. Zimbra can be deployed in a private cloud as well as in a virtual device or hosted in the public cloud, making it easier for IT to deploy, manage and scale dramatically lower costs compared to other solutions.