RFC 5248: A Registry for SMTP Enhanced Mail System Status Codes

The specification for enhanced mail system status codes, RFC 3463, establishes a new code model and lists a collection of status codes. While it anticipated…

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Outgoing relationships (7 related RFCs)

Updates, Normative reference — RFC 3463: Enhanced Mail System Status Codes
Updates, Normative reference — RFC 4954: SMTP Service Extension for Authentication
Updates, Normative reference — RFC 4468: Message Submission BURL Extension
Normative reference — RFC 2821: Simple Mail Transfer Protocol
Normative reference — RFC 3886: An Extensible Message Format for Message Tracking Responses
Informative reference — RFC 5226: Guidelines for Writing an IANA Considerations Section in RFCs
Informative reference — RFC 1893: Enhanced Mail System Status Codes

Incoming relationships (5 related RFCs)

Normatively referenced by — RFC 5598: Internet Mail Architecture
Normatively referenced by — RFC 6531: SMTP Extension for Internationalized Email
Normatively referenced by — RFC 5336: SMTP Extension for Internationalized Email Addresses
Normatively referenced by — RFC 8689: SMTP Require TLS Option
Normatively referenced by — RFC 6710: Simple Mail Transfer Protocol Extension for Message Transfer Priorities