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RFC documentation

RFCs

RFC 3798: Message Disposition Notification

Alaa 22 July 2026

Previous MDN RFC. Obsoleted by RFC 8098 in 2017.

RFCs

RFC 2919: List-Id: A Structured Field and Namespace for the Identification of Mailing Lists

Alaa 22 July 2026

Defines the List-Id header for uniquely identifying mailing lists, used by email clients to organise list mail.