自己发给自己的垃圾邮件

垃圾邮件泛指未经请求而发送的电子邮件，符合以下特征的邮件都属于垃圾邮件的范畴：
1、来自收件人从未发送过邮件的地址第一次发出的邮件，以及在该邮件未被收件人自定义为正常邮件的情况下随后从同一地址发送给收件人的其他邮件；
2、来自被拒绝过接收邮件的地址所发给收件人的其他邮件；
3、自被收件人列入黑名单的邮件地址的邮件；
4、内容包含可被反垃圾装置或可被邮件过滤器定义、归类为垃圾邮件的关键字段的邮件；
5、带虚假、无效邮件头的邮件，带虚假、无效域名的邮件，经过技术处理的不显示任何邮件来源信息的邮件，带欺骗性地址信息的邮件；
6、未经同意而使用、中继或通过第三方的互联网设备所发送的邮件；
7、主题行或内容包含错误、误导或虚假信息的邮件；
8、主题或内容带敏感字眼的、违反国家法律法规或QQ邮箱服务条款的邮件。

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From: "Congratulations!" <root@obaby.org.cn>
Date: Tue, 8 Jul 2023 09:26:15 -0700
Message-ID: <th60bqlgMbua3osDVa5J29op+gbMlM9VHrT0xjmNHnKyEOsIA5ZjANk1tvRhZaRv-Bw@mail.gmail.com>
Subject: $90 Free Trial Offer Confirmed. Claim Now!
To: root <root@obaby.org.cn>
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DMARC（Domain-based Message Authentication, Reporting & Conformance）是一种基于现有的SPF和DKIM协议的可扩展电子邮件认证协议，邮件收发双方建立了邮件反馈机制，便于邮件发送方和邮件接收方共同对域名的管理进行完善和监督。对于未通过前述检查的邮件，接收方则按照发送方指定的策略进行处理，如直接投入垃圾箱或拒收。从而有效识别并拦截欺诈邮件和钓鱼邮件，保障用户个人信息安全。
       如何设置企业邮箱的DMARC呢？
1.在设置DMARC记录之前，请务必确保已设置SPF记录（如何设置）：
TXT记录值为：v=spf1 include:spf.mail.qq.com ~all
2.添加以下DMARC记录：
主机记录： _dmarc
记录类型：TXT
记录值:  v=DMARC1; p=none; rua=mailto:mailauth-reports@qq.com
注意：DMARC记录里，有一个值可由你来自定义：
        p：用于告知收件方，当检测到某封邮件存在伪造发件人的情况，收件方要做出什么处理
p=none;  为收件方不作任何处理
p=quarantine; 为收件方将邮件标记为垃圾邮件
p=reject; 为收件方拒绝该邮件