作者： 发布于：2019-2-10 11:50:23 点击量：

550 Spam is embedded in the email

原因：     该邮件内容用户自定义部分被嵌入了垃圾信息，被大量用户投诉为垃圾邮件，QQ邮箱将禁止此类邮件内容的发送。

建议：     如果您是此群发邮件的管理员，请停止发送嵌入垃圾内容的邮件，并对邮件中用户自定义部分(如昵称、收件人地址等，示例如图1所示)

          内容进行检查，对自定义内容进行过滤和漏洞修复。如果您是个人邮箱用户，请向您的电子邮件提供商报告此情况。

Reason:    The user-defined part of this email was embedded with spam， and it  has been reported by many users. QQMail will prohibit the sending of such email content. 

Suggestion: If you are the administrator of this email,  please stop sending it and check the user-defined parts (such as nickname, recipient address, etc.An example is shown in Figure 1.)

           in the mail,filter and fix the customized spam. If you are an individual user, please report this to your email provider.

这是腾讯官网的解释：
https://service.mail.qq.com/cgi-bin/help?subtype=1&&no=1001517&&id=20022