ZCS Administrator's Guide Open Source Edition 6.0, Rev 1

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 message 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 mail filter that attempt to identify spam

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

•	James/Sieve filtering, used to create filters for email

ZCS Administrator's Guide Open Source Edition 6.0, Rev 1