RFC 6531: SMTP Extension for Internationalized Email

This document specifies an SMTP extension for transport and delivery of email messages with internationalized email addresses or header information.…

Read RFC 6531 on the RFC Editor

Outgoing relationships (23 related RFCs)

Obsoletes, Informative reference — RFC 5336: SMTP Extension for Internationalized Email Addresses
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 3629: UTF-8, a transformation format of ISO 10646
Normative reference — RFC 5322: Internet Message Format
Normative reference — RFC 5890: Internationalized Domain Names for Applications (IDNA): Definitions and Document Framework
Normative reference — RFC 5321: Simple Mail Transfer Protocol
Normative reference — RFC 3461: Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)
Normative reference — RFC 3464: An Extensible Message Format for Delivery Status Notifications
Normative reference — RFC 3463: Enhanced Mail System Status Codes
Normative reference — RFC 6532: Internationalized Email Headers
Normative reference — RFC 6530: Overview and Framework for Internationalized Email
Normative reference — RFC 6409: Message Submission for Mail
Normative reference — RFC 6152: SMTP Service Extension for 8-bit MIME Transport
Normative reference — RFC 5248: A Registry for SMTP Enhanced Mail System Status Codes
Normative reference — RFC 6533: Internationalized Delivery Status and Disposition Notifications
Normative reference — RFC 3848: ESMTP and LMTP Transmission Types Registration
Informative reference — RFC 2045: Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies
Informative reference — RFC 3207: SMTP Service Extension for Secure SMTP over Transport Layer Security
Informative reference — RFC 5598: Internet Mail Architecture
Informative reference — RFC 2033: Local Mail Transfer Protocol
Informative reference — RFC 4954: SMTP Service Extension for Authentication
Informative reference — RFC 3030: SMTP Service Extensions for Transmission of Large and Binary MIME Messages

Incoming relationships (9 related RFCs)

Normatively referenced by — RFC 6532: Internationalized Email Headers
Normatively referenced by — RFC 6530: Overview and Framework for Internationalized Email
Normatively referenced by — RFC 6857: Post-Delivery Message Downgrading for Internationalized Email Messages
Normatively referenced by — RFC 8823: Extensions to Automatic Certificate Management Environment for End-User S/MIME Certificates
Normatively referenced by — RFC 9549: Internationalization Updates to RFC 5280
Normatively referenced by — RFC 9598: Internationalized Email Addresses in X.509 Certificates
Normatively referenced by — RFC 9873: Additional Email Address Extension for the Extensible Provisioning Protocol (EPP)
Informatively referenced by — RFC 6778: Requirements for Archiving IETF Email Lists and for Providing Web-Based Browsing and Searching
Informatively referenced by — RFC 7017: IMAP Access to IETF Email List Archives