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Ubuntu 20.04 上带有 Dovecot 的 Postfix postfix/mail 致命错误：没有 sasl 身份验证机制

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Ubuntu 20.04 上带有 Dovecot 的 Postfix postfix/mail 致命错误：没有 sasl 身份验证机制

这是 doveconf -n 的输出：

# 2.3.7.2 (3c910f64b): /etc/dovecot/dovecot.conf
# Pigeonhole version 0.5.7.2 ()
# OS: Linux 5.17.5-x86_64-linode154 x86_64 Ubuntu 20.04.4 LTS 
# Hostname: mail.servicemouse.com
doveconf: Error: t_readlink(/var/run/dovecot/dovecot.conf) failed: readlink() failed: No such file or directory
auth_debug = yes
auth_mechanisms = plain login
auth_verbose = yes
disable_plaintext_auth = no
mail_debug = yes
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mail_privileged_group = mail
managesieve_notify_capability = mailto
managesieve_sieve_capability = fileinto reject envelope encoded-character vacation subaddress comparator-i;ascii-numeric relational regex imap4flags copy include variables body enotify environment mailbox date index ihave duplicate mime foreverypart extracttext
namespace inbox {
  inbox = yes
  location = 
  mailbox Drafts {
    special_use = \Drafts
  }
  mailbox Junk {
    special_use = \Junk
  }
  mailbox Sent {
    special_use = \Sent
  }
  mailbox "Sent Messages" {
    special_use = \Sent
  }
  mailbox Trash {
    special_use = \Trash
  }
  prefix = 
}
passdb {
  driver = pam
}
plugin {
  sieve = file:~/sieve;active=~/.dovecot.sieve
}
protocols = " imap lmtp sieve pop3 submission"
service auth {
  unix_listener private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}
ssl_cert = </etc/letsencrypt/live/<host>/fullchain.pem
ssl_dh = # hidden, use -P to show it
ssl_key = # hidden, use -P to show it
submission_relay_host = 127.0.0.1
submission_relay_ssl = starttls
submission_relay_trusted = yes
userdb {
  driver = passwd
}

以下是 postconf -n 的输出：

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
compatibility_level = 2
inet_interfaces = all
inet_protocols = all
mailbox_size_limit = 0
mydestination = $myhostname, mail.servicemouse.com, localhost.servicemouse.com, , localhost
myhostname = mail.servicemouse.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = no
recipient_delimiter = +
relayhost =
smtp_tls_cert_file = /etc/letsencrypt/live/mail.servicemouse.com/fullchain.pem
smtp_tls_key_file = /etc/letsencrypt/live/mail.servicemouse.com/privkey.pem
smtp_tls_security_level = may
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtp_use_tls = yes
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_service = smtpd
smtpd_sasl_type = dovecot
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/letsencrypt/live/mail.servicemouse.com/fullchain.pem
smtpd_tls_key_file = /etc/letsencrypt/live/mail.servicemouse.com/privkey.pem
smtpd_tls_security_level = may
smtpd_use_tls = yes
virtual_alias_domains = site1.com, site2.com
virtual_alias_maps = hash:/etc/postfix/virtual

答案1

/var/run/dovecot/dovecot.conf) 失败：readlink() 失败：没有此文件或目录

Dovecot 未运行。它通常会将对有效配置的引用放在那里，这就是 doveconf 显示此错误的原因。

尝试启动它并查看相关日志以了解原因。

答案2

我的猜测是，您在 dovecot 配置中指定的 auth listener 的路径放在了 postfix 无法访问的位置（因为该路径必须位于 postfix 的 chroot 内） - 尝试使用绝对路径：

service auth {
  unix_listener /var/spool/postfix/private/auth {
    group = postfix
    mode = 0660
    user = postfix
  }
}

答案3

我通过编辑 10-master.conf 来运行 dovecot，并在服务身份验证下将 unix_listener 设置为 /var/spool/postfix/private/auth

答案4

我在禁用 ipv6 后遇到了这个问题。对我来说，解决方案是在 /etc/dovecot/dovecot.conf 中修改以下行：

#listen = *, ::
listen = *

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