我使用由我的域名形成的自定义电子邮件地址。我使用 POP，但可以选择不从服务器删除电子邮件（服务器在云端，而不是我自己的），因此不同 PC 上的电子邮件客户端仍然可以收到同一封电子邮件。
今天我收到了一封“邮件投递失败”通知，而我肯定没有发送过一封邮件，邮件地址似乎是随机的。我本应发送的邮件内容只是“doc”。
我检查了 cpanel 的跟踪配送，没有从我的地址发送任何电子邮件，只有配送失败的通知。这怎么可能呢？
发生了什么事？我该怎么办？
以下为通知内容。
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:
[email protected]
host gmail-smtp-in.l.google.com [74.125.195.27]
SMTP error from remote mail server after RCPT TO:<[email protected]>:
550-5.1.1 The email account that you tried to reach does not exist. Please try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1 https://support.google.com/mail/?p=NoSuchUser v11si20495962pfm.249 - gsmtp
Reporting-MTA: dns; server205.web-hosting.com
Action: failed Final-Recipient: rfc822;[email protected] Status:
5.0.0 Remote-MTA: dns; gmail-smtp-in.l.google.com Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to reach does not
exist. Please try 550-5.1.1 double-checking the recipient's email
address for typos or 550-5.1.1 unnecessary spaces. Learn more at 550
5.1.1 https://support.google.com/mail/?p=NoSuchUser v11si20495962pfm.249 - gsmtp
以下是电子邮件标题。
To: [email protected]
Return-path: (I have deleted thi)
Received: from (I have deleted this)
helo=(I have deleted this) by server205.web-hosting.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) (Exim 4.92) (envelope-from "This is my actual email address") id 1iMvws-0034EY-Fe for [email protected]; Tue, 22 Oct 2019 11:19:55 -0400
Message-ID: <c7346356-3178-340a-75fd-e1966ccb2063@"This is my actual email address">
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101
Thunderbird/68.1.2
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
Content-Language: en-US
X-OutGoing-Spam-Status: No, score=0.8
答案1
这通常是一封网络钓鱼电子邮件，可能包含两种攻击媒介：
如果你查看“被拒绝”邮件的内容，他们可能会将你引导到一个有害的网站。这是在利用你的好奇心来对付你。
邮件或邮件头中可能会提到一个或多个电子邮件地址，目的是让您向他们发送电子邮件。这里的目的只是发现您在域中的真实地址。一旦知道该地址，它就会受到更严重的攻击或垃圾邮件，甚至出售给其他黑客。
最好的保护方法是删除这封电子邮件并且除了忽略它之外不采取任何其他行动。