ZCS Administrator Guide 7.2.1

Open Source Edition

Zimbra Components

Zimbra architecture includes open-source integrations using industry standard protocols. The third-party software listed below is bundled with Zimbra software and installed as part of the installation process. These components have been tested and configured to work with the software.

Jetty, the web application server that Zimbra software runs in.

Postfix, an open source mail transfer agent (MTA) that routes mail messages to the appropriate Zimbra server

OpenLDAP software, an open source implementation of the Lightweight Directory Access Protocol (LDAP) that provides user authentication

MySQL database software

Lucene, an open source full-featured text and search engine

Anti-virus and anti-spam open source components including:

•	ClamAV, an anti-virus scanner that protects against malicious files

•	SpamAssassin, a mail filter that attempts to identify spam

•	Amavisd-new interfaces between the MTA and one or more content checkers

James/Sieve filtering, used to create filters for email