Cyrus IMAP Server, version 2.3
IMAP (Internet Message Access Protocol) is an Internet standards-track
protocol for accessing messages (mail, bboards, news, etc). The Cyrus
IMAP server differs from other IMAP server implementations in that it
is generally intended to be run on sealed servers, where normal users
are not permitted to log in. The mailbox database is stored in parts of
the filesystem that are private to the Cyrus IMAP system. All user
access to messages is through the IMAP, POP3, KPOP or NNTP protocols.
The private mailbox database design gives the server large advantages
in efficiency, scalability, and administratability. Multiple concurrent
read/write connections to the same mailbox are permitted. The server
supports access control lists on mailboxes and storage quotas on
mailbox hierarchies.
The Cyrus project is the implementation of IMAP servers by the Carnegie
Mellon University Computing Services Department. Over the next few
months, we will be releasing components of this server, which will
provide better mail security and easier mail administration.
The Cyrus IMAP Server Distribution
Cyrus IMAP Server distribution
Documentation
* General release information
* Overview and Concepts
* Installing the Cyrus IMAP Server
* Changes since the last release
* Frequently Asked Questions
* Man Pages
* Protocol Specifications