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使用配置了 DMARC 的子域发送 RUA 时，是否需要添加 DMARC 报告 TXT 记录？

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使用配置了 DMARC 的子域发送 RUA 时，是否需要添加 DMARC 报告 TXT 记录？

[email protected]如果我从[email protected]DMARC 记录中的发送电子邮件subdomain.example.com，是否有必要创建 DMARC 报告 TXT 记录（例如subdomain.example.com._report._dmarc.example.com TXT "v=DMARC1"）？

答案1

不，根据射频功能函数库：

When a Mail Receiver discovers a DMARC policy in the DNS, and the
   Organizational Domain at which that record was discovered is not
   identical to the [Organizational Domain][2] of the host part of the
   authority component of a [URI] specified in the "rua" or "ruf" tag,
   the following verification steps are to be taken:

 1.  Extract the host portion of the authority component of the URI.
       Call this the "destination host", as it refers to a Report
       Receiver.

 2.  Prepend the string "_report._dmarc".

[2]https://www.rfc-editor.org/rfc/rfc7489#section-3

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