Scality Silver PartnerZimbra Collaboration Suite is the open-source alternative to Exchange for Enterprises and xSPs. It has a feature-full webmail application that plugs into existing IT infrastructure. Zimbra is also a fully-fledged email server offering IMAP and POP3 access, as well as file sharing. Zimbra is tightly integrated with Scality for large scale deployments of millions of users and billions of emails.