Question

我在Windows HyperV中使用Centos服务器。当我通过此服务器发送邮件时，收到错误邮件。

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

  serefseven@gmail.com
    host gmail-smtp-in.l.google.com [66.102.1.26]
    SMTP error from remote mail server after end of data:
    550-5.7.1 [185.124.86.138] The IP address sending this message does not have a
    550-5.7.1 PTR record setup. As a policy, Gmail does not accept messages from
    550-5.7.1 IPs with missing PTR records. Please visit
    550-5.7.1  https://support.google.com/mail/answer/81126#authentication for more
    550 5.7.1 information. y187si26143569wmc.112 - gsmtp
Reporting-MTA: dns; ln1.postoflscell.com

Action: failed
Final-Recipient: rfc822;serefseven@gmail.com
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [185.124.86.138] The IP address sending this message does not have a
 550-5.7.1 PTR record setup. As a policy, Gmail does not accept messages from
 550-5.7.1 IPs with missing PTR records. Please visit
 550-5.7.1  https://support.google.com/mail/answer/81126#authentication for more
 550 5.7.1 information. y187si26143569wmc.112 - gsmtp

mxtollbox.com smtp测试结果：

SMTP反向DNS不匹配反向DNS不包含主机名

SMTP横幅检查反向DNS与SMTP横幅不匹配

SMTP TLS警告 - 不支持TLS。

SMTP交易时间15.485秒 - 不好！在交易时间

SMTP有效主机名确定 - 反向DNS是有效的主机名

SMTP连接时间0秒 - 连接时间良好

SMTP Open Relay OK - 不是开放中继。

如何解决这个问题？

Answer 1

由于错误状态为The IP address sending this message does not have a PTR record setup，因此您需要为185.124.86.138设置PTR记录（接收邮件服务器通常需要this）。反向DNS由“拥有”IP地址的人控制，因此您应该联系Bilgehosting为您设置记录。

反向DNS不包含主机名

1 个答案: