Dovecot 是一个开源的 IMAP 和 POP3 邮件服务器，支持 Linux/Unix 系统。

POP / IMAP 是 MUA 从邮件服务器中读取邮件时使用的协议。其中，与 POP3 是从邮件服务器中下载邮件比起来，IMAP4 则是将邮件留在服务器端直接对邮件进行管理、操作。而Dovecot 是一个比较新的软件，由 Timo Sirainen 开发，最初发布于 2002年7月。作者将安全性考虑在第一，所以 Dovecot 在安全性方面比较出众。另外，Dovecot 支持多种认证方式，所以在功能方面也比较符合一般的应用。

2012-09-18发布2.1.10  上一个版本是2012年08月02日的2.1.9.修正了一些bug.

改进：

	+ imap: Implemented THREAD=ORDEREDSUBJECT extension.
	+ Added "doveadm exec" command to easily execute commands from
	  libexec_dir, e.g. "doveadm exec imap -u user at domain"
	+ Added "doveadm copy" command.
	+ doveadm copy/move: Added optional user parameter to specify the
	  source username. This allows easily copying mails between different
	  users.
	+ Added namespace { disabled } setting to quickly enable/disable
	  namespaces. This is especially useful when its value is returned by
	  userdb.
	+ Added mailbox_alias plugin. It allows creating mailbox aliases using
	  symlinks.
	+ imapc storage: Added imapc_max_idle_time setting to force activity
	  on connection.
	+ fts-solr: Expunging multiple messages is now faster.
	- director: In some conditions director may have disconnected from
	  another director (without logging about it), thinking it was sending
	  invalid data.
	- imap: Various fixes to listing mailboxes.
	- pop3-migration plugin: Avoid disconnection from POP3 server due
	  to idling.
	- login processes crashed if there were a lot of local {} or remote {}
	  settings blocks.

下载：http://www.dovecot.org/releases/2.1/dovecot-2.1.10.tar.gz