ConceptInternet Message Format

RFC 5322

An internet standard defining the syntax of email messages, including specifications for header fields such as Message-ID, From, and To. It serves as a foundational protocol standard for modern email systems.

Timeline (last 90 days)

Oct 11

RFC 5322 requires the Message-ID header of each email to be globally unique, in the format <local-part@domain>.

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All Facts (1)

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RFC 5322 requires the Message-ID header of each email to be globally unique, in the format <local-part@domain>.

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Source Articles

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