RFC 6729: Indicating Email Handling States in Trace Fields

This document registers a trace field clause for use in indicating transitions between handling queues or processing states, including enacting inter- and…

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Outgoing relationships (4 related RFCs)

Normative reference — RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
Normative reference — RFC 5322: Internet Message Format
Normative reference — RFC 5321: Simple Mail Transfer Protocol
Informative reference — RFC 4865: SMTP Submission Service Extension for Future Message Release