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POP3/IMAP 邮件服务器,Dovecot 2.1.0

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。

2012-02-19发布2.1.0正式版 经过7个RC 上一个版本是2012年02月13日的2.0.18.


* Plugins now use UTF-8 mailbox names rather than mUTF-7:
  acl, autocreate, expire, trash, virtual
* auth_username_format default changed to %Lu. If you really want
  case sensitive usernames, set it back to empty.
* Solr full text search backend changed to use mailbox GUIDs instead of
  mailbox names, requiring reindexing everything. solr_old backend can
  be used with old indexes to avoid reindexing, but it doesn't support
  some newer features.
* Expire plugin: Only go through users listed by userdb iteration.
  Delete dict rows for nonexistent users, unless
* Temporary authentication failures sent to IMAP/POP3 clients
  now includes the server's hostname and timestamp. This makes it
  easier to find the error message from logs.
* dsync was merged into doveadm. There is still "dsync" symlink
  pointing to "doveadm", which you can use the old way for now.
  The preferred ways to run dsync are "doveadm sync" (for old "dsync
  mirror") and "doveadm backup".

+ imapc (= IMAP client) storage allows using a remote IMAP server to
  be used as storage. This allows using Dovecot as a smart (caching)
  proxy or using dsync to do migration from remote IMAP server.
+ Mailbox indexing via queuing indexer service (required for Lucene)
+ Lucene full text search (FTS) backend rewritten with support for
  different languages
+ FTS finally supports "OR" search operation
+ FTS supports indexing attachments via external programs
+ IMAP FUZZY extension, supported by Lucene and Solr FTS backends
+ IMAP SPECIAL-USE extension to describe mailboxes
+ Mailbox list indexes
+ Statistics tracking via stats service. Exported via doveadm stats.
+ Autocreate plugin creates/subscribes mailboxes physically only when
  the mailbox is opened for the first time. Mailbox listing shows the
  autocreated mailboxes even if they don't physically exist.
+ Password and user databases now support default_fields and
  override_fields settings to specify template defaults/overrides.
+ SCRAM-SHA-1 authentication mechanism by Florian Zeitz
+ LDAP: Allow building passdb/userdb extra fields from multiple LDAP
  attributes by using %{ldap:attributeName} variables in the template.
+ Improved multi-instance support: Track automatically which instances
  are started up and manage the list with doveadm instance commands.
  All Dovecot commands now support -i <instance_name> parameter to
  select the instance (instead of having to use -c <config path>).
  See instance_name setting.
+ auth: Implemented support for Postfix's "TCP map" sockets for
  user existence lookups.
- listescape plugin works perfectly now