RFC 7444: Security Labels in Internet Email

This document describes a header field, SIO-Label, for use in Internet email to convey the sensitivity of the message. This header field may carry a textual…

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Outgoing relationships (10 related RFCs)

Normative reference — RFC 2119: Key words for use in RFCs to Indicate Requirement Levels
Normative reference — RFC 5234: Augmented BNF for Syntax Specifications: ABNF
Normative reference — RFC 3986: Uniform Resource Identifier (URI): Generic Syntax
Normative reference — RFC 4648: The Base16, Base32, and Base64 Data Encodings
Normative reference — RFC 5322: Internet Message Format
Normative reference — RFC 3864: Registration Procedures for Message Header Fields
Normative reference — RFC 2634: Enhanced Security Services for S/MIME
Normative reference — RFC 2231: MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and Continuations
Informative reference — RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
Informative reference — RFC 822: STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGES