Dovecot userdb 失败：内部故障

Question

我尝试通过在 MySQL 密码查询中添加“allow_nets”选项来保护 Dovecot。当我这样做时，我可以正常查看邮件。

但是，发送到邮箱的任何邮件都会失败，并出现以下情况：

Apr  1 09:38:59 localhost dovecot: deliver(brian@*****.com): userdb lookup(brian@*****.com) failed: Internal failure

dovecot-mysql.conf 包含：

connect = host=localhost dbname=*** user=*** password=***
default_pass_scheme = CRYPT
password_query = SELECT password, allow_nets FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, 5003 AS uid, 5003 AS gid FROM mailbox WHERE username = '%u'

如果我从 password_query 中删除“allow_nets”，一切又会恢复正常。在 MySQL DB 中，“allow_nets”字段包含：127.0.0.1、Postfix IP、我的 IP 地址。

知道我遗漏了什么吗？

编辑：我升级到了 Dovecot 2.2.16，现在在将“allow_nets”添加到 password_query 时收到此错误消息。

dovecot: lda(brian@*****.com): Error: user brian@*****.com: Auth USER lookup failed

Dovecot 配置：

auth_mechanisms = plain digest-md5 login
first_valid_gid = 5000
first_valid_uid = 5000
info_log_path = /dev/null
listen = 127.0.0.1
mail_location = maildir:/opt/virtual/%d/%n
mmap_disable = yes
passdb {
  args = /dovecot/dovecot-mysql.conf
  driver = sql
}
protocols = imap pop3
service auth {
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
  }
  unix_listener auth-master {
    group = virtual
    mode = 0600
    user = virtual
  }
}
service imap-login {
  chroot = login
  inet_listener imaps {
    address = 12.34.56.78
  }
  process_min_avail = 1
  service_count = 0
  user = dovecot
  vsz_limit = 64 M
}
service imap {
  drop_priv_before_exec = yes
  vsz_limit = 768 M
}
service pop3-login {
  chroot = login
  inet_listener pop3 {
    port = 0
  }
  inet_listener pop3s {
    address = 12.34.56.78
  }
  process_min_avail = 1
  service_count = 0
  user = dovecot
  vsz_limit = 64 M
}
service pop3 {
  drop_priv_before_exec = yes
  vsz_limit = 768 M
}
ssl_cert = </etc/ssl/cert.crt
ssl_key = </etc/ssl/key.key
userdb {
  args = uid=5003 gid=5003 home=/var/virtual/%d/%n
  driver = static
}
verbose_proctitle = yes
protocol pop3 {
  pop3_uidl_format = %08Xu%08Xv
}
protocol lda {
  hostname = example.com
  postmaster_address = [email protected]
  sendmail_path = /usr/sbin/sendmail
}