【发布时间】：2021-03-20 22:02:49
【问题描述】：
我有一个带有 Ples 的 VPS。我做了域配置等。我去 webmail.mydomain.com 并登录，当我向 email@hotmail.com 发送电子邮件时，收件人会收到它。当我将它发送到 email@gmail.com 时，它会返回一个错误。
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
【问题讨论】：