wire / http-header / hp-outer

HP-Outer

Message header field "HP-Outer" (protocol: mail), status standard. Defined in RFC9788.

http-header kind header status standard verification verified tier A iana-registry-row@1

aka: HP-Outer

registry record

value: HP-Outer

references: RFC9788

valueHP-Outer
protocolmail
statusstandard
Reference[RFC9788]

provenance

agent: curl -H 'accept: application/json' wire.phall.io/http-header/hp-outer or /http-header/hp-outer.json