Download
Cyrus IMAP Server

The Cyrus IMAP server is generally intended to be run on sealed systems, where normal users are not permitted to log in. The mailbox database is stored in parts of the filesystem that are private to Cyrus. All user access to mail is through the IMAP, POP3, or KPOP 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, multiple SASL mechanisms, and the Sieve mail filtering language.

Tags	Communications Email Post-Office IMAP Internet

Tweet this project Short link

Release tags

All releases

Recent releases

2.3.13

26 Jun 2009 20:52

Changes: Stability and performance improvements as well as significant replication related bugfixes. Quota calculation works in delayed expunge mode.

2.2.12

01 Mar 2005 09:11

Changes: This release fixes several buffer overflows, most of which are single byte overflows in mailbox name handling. A more serious issue was fixed in the NNTP injection handling code.

2.2.10

23 Nov 2004 14:05

Changes: A preauthentication buffer overrun was fixed in proxyd. A null termination issue was fixed in the SASL user canonify routine.

2.1.17

23 Nov 2004 14:04

Changes: Backported security fixes from 2.2 series Cyrus releases (null termination and heap exploits).

2.2.9

22 Nov 2004 16:29

Changes: This release cleans up IMAP magic plus to avoid buffer overrun (CAN-2004-1011). The lack of bounds checking in PARTIAL and FETCH has been fixed (CAN-2004-1012 and CAN-2004-10 13). It no longer attempts reuse of a freed connection in lmtpproxyd.