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Postfix 不工作

tag-icon • tag-icon postfix sasl dovecot
Postfix 不工作

不久前，我在我的 ubuntu 10.04 VPS 上安装了 postfix 邮件服务器。当时它运行良好，但现在却停止工作了。我试图启用 SASL 身份验证，但一定是哪里出了问题。我研究了 postfix main.cf，并按部就班地完成了所有工作，以确保没有问题。我还安装了 Dovecot 并配置了 dovecot.conf 以与 Postfix 一起运行。

如果我在登录服务器时尝试执行 telnet localhost 25，我只会得到：外部主机关闭连接。

如果我尝试“从外部”执行 telnet mail.example.com 25，我会得到：telnet：无法连接到远程主机：没有到主机的路由

当我在尝试失败后检查服务器日志时，我看到了以下内容：

Jun 28 15:49:31 msv postfix/smtpd[11839]: initializing the server-side TLS engine
Jun 28 15:49:31 msv postfix/smtpd[11839]: connect from localhost.localdomain[127.0.0.1]
Jun 28 15:49:31 msv postfix/smtpd[11839]: warning: SASL: Connect to /var/spool/postfix/private/auth failed: Connection refused
Jun 28 15:49:31 msv postfix/smtpd[11839]: fatal: no SASL authentication mechanisms
Jun 28 15:49:32 msv postfix/master[11598]: warning: process /usr/lib/postfix/smtpd pid 11839 exit status 1
Jun 28 15:49:32 msv postfix/master[11598]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling

main.cf 文件如下所示：

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no
append_dot_mydomain = no
delay_warning_time = 4h
myhostname = mail.example.com
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
mydomain = example.com
myorigin = $mydomain
mydestination = $mydomain
relayhost =
mynetworks = 127.0.0.1
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
smtpd_use_tls = yes
smtpd_tls_loglevel = 2
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem
smtpd_sasl_auth_enable = yes
smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetworks,  reject_unauth_destination
smtpd_sender_restrictions = permit_sasl_authenticated, permit_mynetworks
smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination broken_sasl_auth_clients = yes
smtpd_sasl_type = dovecot
smtpd_sasl_path = /var/spool/postfix/private/auth
smtpd_sasl_security_options = noanonymous

Dovecot.conf 文件如下所示：

protocols = imap imaps
disable_plaintext_auth = no
log_timestamp = "%b %d %H:%M:%S "
ssl = yes
ssl_cert_file = /etc/postfix/ssl/smtpd.crt
ssl_key_file = /etc/postfix/ssl/smtpd.key
mail_location = maildir:~/mail
mail_access_groups = mail
auth_username_chars = abcdefghijklmnopqrstuvwxyz
protocol imap {
imap_client_workarounds = delay-newmail tb-extra-mailbox-sep
}

auth default {
mechanisms = plain login
  passdb pam {
  }
  userdb passwd {
  }
  socket listen {
      client {
      path = /var/spool/postfix/private/auth
      user = postfix
      group = postfix
      mode = 0660
    }
  }
}

答案1

我认为您要么需要禁用 sasl：

smtpd_sasl_auth_enable = no

或者，您需要启用（启动）saslauthd。完成上述任一操作后，您应该解决：

Jun 28 15:49:31 msv postfix/smtpd[11839]: warning: SASL: Connect to /var/spool/postfix/private/auth failed: Connection refused

答案2

检查文件的权限/var/spool/postfix/private/auth。sasl 用户应该可以访问它。这让我想起了上次设置 sasl 服务器时的经历。

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