RFC 4954: SMTP Service Extension for Authentication

This document defines a Simple Mail Transport Protocol (SMTP) extension whereby an SMTP client may indicate an authentication mechanism to the server, perform…

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Outgoing relationships (17 related RFCs)

Updates, Normative reference — RFC 3463: Enhanced Mail System Status Codes
Obsoletes, Informative reference — RFC 2554: SMTP Service Extension for Authentication
Normative reference — RFC 4648: The Base16, Base32, and Base64 Data Encodings
Normative reference — RFC 3280: Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile
Normative reference — RFC 3454: Preparation of Internationalized Strings ("stringprep")
Normative reference — RFC 4422: Simple Authentication and Security Layer (SASL)
Normative reference — RFC 2821: Simple Mail Transfer Protocol
Normative reference — RFC 3207: SMTP Service Extension for Secure SMTP over Transport Layer Security
Normative reference — RFC 3461: Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)
Normative reference — RFC 4013: SASLprep: Stringprep Profile for User Names and Passwords
Normative reference — RFC 2034: SMTP Service Extension for Returning Enhanced Error Codes
Normative reference — RFC 4409: Message Submission for Mail
Normative reference — RFC 4616: The PLAIN Simple Authentication and Security Layer (SASL) Mechanism
Informative reference — RFC 4346: The Transport Layer Security (TLS) Protocol Version 1.1
Informative reference — RFC 3851: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification
Informative reference — RFC 2195: IMAP/POP AUTHorize Extension for Simple Challenge/Response
Informative reference — RFC 2015: MIME Security with Pretty Good Privacy (PGP)

Incoming relationships (11 related RFCs)

Updated by, Normatively referenced by — RFC 5248: A Registry for SMTP Enhanced Mail System Status Codes
Normatively referenced by — RFC 5550: The Internet Email to Support Diverse Service Environments (Lemonade) Profile
Informatively referenced by — RFC 6125: Representation and Verification of Domain-Based Application Service Identity within Internet Public Key Infrastructure Using X.509 (PKIX) Certificates in the Context of Transport Layer Security (TLS)
Informatively referenced by — RFC 5598: Internet Mail Architecture
Informatively referenced by — RFC 6528: Defending against Sequence Number Attacks
Informatively referenced by — RFC 6531: SMTP Extension for Internationalized Email
Informatively referenced by — RFC 5336: SMTP Extension for Internationalized Email Addresses
Informatively referenced by — RFC 6885: Stringprep Revision and Problem Statement for the Preparation and Comparison of Internationalized Strings (PRECIS)
Informatively referenced by — RFC 8314: Cleartext Considered Obsolete: Use of Transport Layer Security (TLS) for Email Submission and Access
Informatively referenced by — RFC 7601: Message Header Field for Indicating Message Authentication Status
Informatively referenced by — RFC 9422: The LIMITS SMTP Service Extension