SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/aplus-dmarc-purpose

What does DMARC let a domain owner publish for receiving mail servers?

Domain-level email policies that say how to treat messages that fail checks.

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  1. Domain-level policies for handling suspicious email ✔
  2. The IP address of the mailbox server
  3. An encryption key for each mailbox

Why: DMARC is a mechanism for a mail-sending organization to express domain-level policies and preferences. Receivers use it with SPF and DKIM results. It is not encryption and does not locate servers.

Huh, didn't know that: DMARC stands for Domain-based Message Authentication, Reporting, and Conformance.

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References

Answer: Domain-level policies for handling suspicious email. DMARC is a mechanism for a mail-sending organization to express domain-level policies and preferences. Receivers use it with SPF and DKIM results. It is not encryption and does not locate servers.

  1. RFC 7489 www.rfc-editor.org/rfc/rfc7489
    a scalable mechanism by which a mail-originating organization can express domain-level policies and preferences
    Checked 2026-10-10.
  2. CompTIA A+ Core 1 (220-1201) V15 Exam Objectives lecbyo.files.cmp.optimizely.com/download/34be017cb73211ef8985a6f347fbf652
    Domain-based Message Authentication, Reporting, and Conformance (DMARC)
    Checked 2026-10-10.

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