ZCS Administrator Guide 8.0
ZCS Administrator Guide 8.0
Open Source Edition

Zimbra Mail Transfer Agent > Zimbra MTA Deployment

Zimbra MTA Deployment
ZCS includes a precompiled version of Postfix to route and relay mail and manage attachments. Postfix receives inbound messages via SMTP, performs anti-virus and anti-spam filtering and hands off the mail messages to the VMware Zimbra Collaboration Server server via LMTP.
Postfix also plays a role in transferring outbound messages. Messages composed from the Zimbra Web Client are sent by the Zimbra server through Postfix, including messages sent to other users on the same server.
Postfix in a Zimbra Environment
*The Edge MTA can be any edge security solution for mail. You might already deploy such solutions for functions such as filtering. Some filtering might be duplicated between an edge MTA and the Zimbra MTA.
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