Zimbra, previously known as Liquid Systems, is starting to emerge from stealth mode. Last week at LinuxWorld in San Francisco, they exhibited in the MySQL booth (along with other LAMP based applications and partners) showing off their new open source email solution. Maybe open source email seems like old hat to some folks, but Microsoft Exchange has a lock on IT managers around the world, and Zimbra is fully exchange compatible. It has its own rich web client and is also fully compatible with Outlook as well as any POP3 or IMAP email client.
What that means is IT managers can start using Zimbra in conjunction with their existing exchange servers and get the full benefit of email and calendaring at a fraction of the price of Microsoft's closed source …
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