Question

我在Digital Ocean上的邮件服务器有问题。我的邮件服务器在“邮箱中的邮件”应用程序上工作。每次，当我尝试将邮件发送到例如：some@gmail.com时，我都会收到相同的响应：

Undelivered Mail Returned to Sender

From
MAILER-DAEMON@mail.sporta.io

This is the mail system at host mail.sporta.io.

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

<denis.rohlinsky@gmail.com>: host gmail-smtp-in.l.google.com[108.177.126.27]
    said: 550-5.7.1 This message does not have authentication information or
    fails to pass 550-5.7.1 authentication checks. To best protect our users
    from spam, the 550-5.7.1 message has been blocked. Please visit 550-5.7.1
    https://support.google.com/mail/answer/81126#authentication for more 550
    5.7.1 information. v27si4529334edm.111 - gsmtp (in reply to end of DATA
    command)

Reporting-MTA: dns; mail.sporta.io
X-Postfix-Queue-ID: 83217200D6
X-Postfix-Sender: rfc822; admin@sporta.io
Arrival-Date: Fri,  1 Feb 2019 20:27:51 +0100 (CET)

Final-Recipient: rfc822; denis.rohlinsky@gmail.com
Original-Recipient: rfc822;denis.rohlinsky@gmail.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 This message does not have authentication
    information or fails to pass 550-5.7.1 authentication checks. To best
    protect our users from spam, the 550-5.7.1 message has been blocked. Please
    visit 550-5.7.1
    https://support.google.com/mail/answer/81126#authentication for more 550
    5.7.1 information. v27si4529334edm.111 – gsmtp


Subject
test
From
admin@sporta.io
To
denis.rohlinsky@gmail.com
Date
Today 21:27

P.S。我通过其他服务检查了我的服务器（已将邮件发送到mail.io，mail.com，mail.ru）它正常工作。我可以将邮件发送到该服务而没有任何问题，但是gmail继续阻止我的邮件。我需要解决什么问题？

要成功将邮件发送到mail.com，mail.ru

接收来自gmail的邮件

Answer 1

在Gmail中注册发送电子邮件地址，并等待其通过身份验证。 Gmail仅接受来自gmail地址或已知与Gmail帐户相关联的地址的邮件。

Answer 2

正如Juan在其回复here中所提到的那样，您可能需要添加所需的DNS TXT记录。或者，您可以调查Google Postmaster Tools。这可能会为您解决当前的问题。

Answer 3

未经身份验证的电子邮件通常会被拒绝或标记为垃圾邮件，以保护收件人免受网络钓鱼诈骗的侵害。出于安全原因，带有附件的未经身份验证的电子邮件可能会被完全拒绝。

为确保Gmail可以对您进行身份验证，



从相同的IP地址发送



保持有效的反向DNS记录您指向域的IP地址


为每个批量邮件在“发件人：”标头中选择相同的地址

对于mail.sporta.io反向DNS解析-未找到PTR记录。

找不到dmarc:sporta.io DNS记录。

找不到spf:sporta.io DNS记录。

无法将邮件（我的服务器（Ubuntu14 / mailinabox））发送到gmail

3 个答案: