dovecot-lda

dovecot.conf

auth default {
  socket listen {
    master {
      # Master socket provides access to userdb information. It's typically
      # used to give Dovecot's local delivery agent access to userdb so it 
      # can find mailbox locations.
      path = /var/run/dovecot/auth-master
      mode = 0600
      # Default user/group is the one who started dovecot-auth (root)
      user = vmail
      group = mail
    }
  }
}

master.cf

dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/local/libexec/dovecot/deliver -f ${sender} -d ${recipient}

mail.cf

dovecot_destination_concurrency_limit = 1
dovecot_destination_recipient_limit = 1
virtual_transport = dovecot

dovecot-sql.conf

user_query = SELECT concat(/home/mbox/', maildir) AS home, 'maildir:/home/mbox/%u' AS mail , 150 AS uid, 150 AS gid FROM mailbox WHERE username = '%u' AND active = '1'

password_query = SELECT username AS user, password, concat('/home/mbox/', maildir) AS userdb_home, 'maildir:/home/mbox/%u' AS userdb_mail, 150 AS userdb_uid, 150 AS userdb_gid FROM mailbox WHERE username = '%u' AND active = '1'

ref.
http://wiki.dovecot.org/LDA/Postfix

Q:
Dec 12 02:28:15 mail dovecot: deliver(johnpupu@example.tw): Fatal: setgid(125(postfix)) failed with euid=143(dovecot), gid=6(mail), egid=6(mail): Operation not permitted

A:
像這樣的uid錯誤就是，dovecot-sql.conf 這個 uid 和master.cf中設的user id 沒不一樣造成的..

Q:
Dec 12 16:36:07 mail dovecot: deliver(johnpupu@example.tw): mail_location: Ambiguous mail location setting, don’t know what to do with it: /home/mbox/johnpupu@example.tw (try prefixing it with mbox: or maildir:)

A:
請乖乖的在dovecot-sql.conf把
maildir: 加在你的/home/mbox/%u 前面
就好了…

Q:
Relative home directory paths not supported (user johnpupu@example.tw): maildir:/home/mbox/johnpupu@example.tw

A:
這個問題就是user_query 的home 設錯了..
請設成
SELECT concat(‘/home/mbox/’, maildir) AS home,
就好了….
把mail_debug=yes 打開會看的滿清楚的