我最近使用Postfix，Dovecot和MySQL在linode上设置了邮件服务器。 我可以发送和接收来自邮件客户端（Outlook）的邮件，但任何时候我尝试从一个WordPress用户从我devise的一个用户发送邮件不起作用。 以下是错误日志的输出：
Oct 27 18:36:52 hostname postfix/master[29738]: reload -- version 2.11.0, configuration /etc/postfix Oct 27 18:37:00 hostname postfix/master[29738]: terminating on signal 15 Oct 27 18:37:00 hostname postfix/master[8304]: daemon started -- version 2.11.0, configuration /etc/postfix Oct 27 18:37:12 hostname postfix/smtpd[8309]: warning: hostname mydomain.com does not resolve to address 2a01:7e00::f03c:91ff:fecf:e7a6 Oct 27 18:37:12 hostname postfix/smtpd[8309]: connect from unknown[2a01:7e00::f03c:91ff:fecf:e7a6] Oct 27 18:37:12 hostname postfix/smtpd[8309]: lost connection after UNKNOWN from unknown[2a01:7e00::f03c:91ff:fecf:e7a6] Oct 27 18:37:12 hostname postfix/smtpd[8309]: disconnect from unknown[2a01:7e00::f03c:91ff:fecf:e7a6] 我的main.cf文件是这样设置的：
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) biff = no append_dot_mydomain = no readme_directory = no smtpd_tls_cert_file=/etc/dovecot/dovecot.pem smtpd_tls_key_file=/etc/dovecot/private/dovecot.pem smtpd_use_tls=yes smtpd_tls_auth_only = yes smtp_tls_security_level = may smtpd_tls_security_level = may dovecot smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth smtpd_sasl_auth_enable = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = hostname.mydomain.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = /etc/mailname mydestination = mydomain.com, hostname.mydomain.com, localhost.mydomain.com, localhost relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all inet_protocols = all message_size_limit = 20480000 virtual_transport = lmtp:unix:private/dovecot-lmtp virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf, mysql:/etc/postfix/mysql-virtual-email2email.cf
禁用IPv6
inet_protocols = ipv4
应该做的伎俩
用文本编辑器打开/etc/postfix/main.cf
find这行inet_protocols = all
全部用ipv4replace
重新启动后缀
https://clientarea.ramnode.com/knowledgebase.php?action=displayarticle&id=108