Question

我有一个带 Ples 的 VPS。我进行了域配置等。我转到 webmail.mydomain.com 并登录，当我将电子邮件发送到 email@hotmail.com 时，收件人会收到它。当我将它发送到 email@gmail.com 时，它返回一个错误。

错误如下：

This is the mail system at host xxxxxxxxxxxxxxxxxxxxxxx.

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<xxxxxxxxx@gmail.com>: host gmail-smtp-in.l.google.com[142.250.138.26]
    said: 550-5.7.26 This message does not have authentication information or
    fails to 550-5.7.26 pass authentication checks. To best protect our users
    from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26
    https://support.google.com/mail/answer/81126#authentication for more 550
    5.7.26 information. a6si7013466oic.272 - gsmtp (in reply to end of DATA
    command)
Reporting-MTA: dns; xxxxxxxxxxxxxxx
X-Postfix-Queue-ID: 4F52C100FA1
X-Postfix-Sender: rfc822; xxxxx@mydomain.com
Arrival-Date: Sat, 20 Mar 2021 21:44:24 +0000 (UTC)

Final-Recipient: rfc822; xxxxxxxxx@gmail.com
Original-Recipient: rfc822;xxxxxxxxx@gmail.com
Action: failed
Status: 5.7.26
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.26 This message does not have authentication
    information or fails to 550-5.7.26 pass authentication checks. To best
    protect our users from spam, the 550-5.7.26 message has been blocked.
    Please visit 550-5.7.26
    https://support.google.com/mail/answer/81126#authentication for more 550
    5.7.26 information. a6si7013466oic.272 - gsmtp

Answer 1

基本上，错误消息包含指向可能原因的链接。

https://support.google.com/mail/answer/81126#authentication

为什么会这样？

因为 Gmail 不只是接受来自任何域的电子邮件而不对其进行身份验证。

研究关键词 SPF、DMARC 和 DKIM。他们会引导您走上正确的道路。

未送达的邮件退回给发件人 Roundcube Plesk

1 个答案: