前一段时间，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，但现在只是停止工作。 我正在尝试启用SASLauthentication，并且在某个地方它一定是错误的。 我已经研究了postfix main.cf，并且以有序的方式完成了一切，以确保它没有错。 我也有Dovecot安装和configurationdovecot.conf与Postfix运行。
如果我尝试在服务器上login时执行telnet localhost 25，我只能得到：由外部主机closures的连接。
如果我尝试从外部做telnet mail.example.com 25“我得到：telnet：无法连接到远程主机：没有路由到主机
而当我检查失败的尝试后，我看到这个服务器日志：
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文件看起来像这样：
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 } } }
我想你或者需要禁用sasl：
smtpd_sasl_auth_enable = no
或者，您需要启用（启动）saslauthd。 一旦你完成了其中的任何一个，你应该解决：
Jun 28 15:49:31 msv postfix/smtpd[11839]: warning: SASL: Connect to /var/spool/postfix/private/auth failed: Connection refused
检查/var/spool/postfix/private/auth文件的权限。 它应该可以由sasl用户访问。 这从设置我的最后sasl服务器响起。