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Registration of Mail and MIME Header Fields
RFC 4021

Revision differences

Document history

Date By Action
2026-05-20
(System) Changed metadata: changed keywords to '['IANA']' from '[]'
2026-05-20
(System) Metadata update from RFC Editor
2026-05-20
(System) Changed author "J. Palme": changed name from "Jacob Palme" to "J. Palme", cleared country (was "Sweden"), changed order from "1" to "2"
2026-05-20
(System)
Changed author "G. Klyne": changed name from "Graham Klyne" to "G. Klyne", cleared country (was "South Parks Road, Oxford OX1 3PS, UK"), changed order from …
Changed author "G. Klyne": changed name from "Graham Klyne" to "G. Klyne", cleared country (was "South Parks Road, Oxford OX1 3PS, UK"), changed order from "0" to "1"
2026-05-20
(System) Metadata update from RFC Editor
2005-03-26
Amy Vezza State Changes to RFC Published from RFC Ed Queue by Amy Vezza
2005-03-26
Amy Vezza [Note]: 'RFC 4021' added by Amy Vezza
2005-03-18
(System) RFC published