SMTP
RFC 5321 Simple Mail Transfer Protocol
https://tex2e.github.io/rfc-translater/html/rfc5321.html
https://datatracker.ietf.org/doc/html/rfc5321
RFC 1123 インターネットホストの要件: アプリケーションとサポート → Updates 5321
https://jprs.jp/tech/material/rfc/RFC1123-ja.txt
電子メールの転送方式
Port 25
Submission用もある
本文はRFC 5322 IMFなど
RFC 2821 → 5321
RFC 1869 → 2821
RFC 974 → 2821
RFC 821 → 2821
SASL認証などが利用可能
認証
SMTP-AUTH
DKIM
DMARC
SPF
RRVS
S/MIME
RFC 8601 Message Header Field for Indicating Message Authentication Status
RFC 7601 Message Header Field for Indicating Message Authentication Status → 8601
RFC 7001 Message Header Field for Indicating Message Authentication Status → 7601
RFC 5451 Message Header Field for Indicating Message Authentication Status → 7001
Submission
RFC 2476 Message Submission → 4409
RFC 4409 Message Submission for Mail → 6409
RFC 5068 Email Submission Operations: Access and Accountability Requirements → Update 8314
RFC 6409 Message Submission for Mail
RFC 8314 Cleartext Considered Obsolete: Use of Transport Layer Security (TLS) for Email Submission and Access → Update 8997
RFC 8997 Deprecation of TLS 1.1 for Email Submission and Access
SMTP Service Extension 他
RFC 1425 からは 2821 に統合
RFC 1869 (廃止) SMTP Service Extensions → 2821
RFC 1651 (廃止) SMTP Service Extensions → 1869
RFC 1425 (廃止) SMTP Service Extensions → 1651
RFC 1652 SMTP Service 拡張 for 8bit-MIMEtransport → 6152
RFC 1830 SMTP Service Extensions for Transmission of Large and Binary MIME Messages → 3030
RFC 1845 SMTP Service Extension for Checkpoint/Restart
RFC 1870 SMTP Service Extension for Message Size Declaration
RFC 1891 SMTP Service Extension for Delivery Status Notifications
RFC 1985 SMTP Service Extension for Remote Message Queue Starting
RFC 2034 SMTP Service Extension for Returning Enhanced Error Codes
RFC 2197 SMTP Service Extension for Command Pipelining
RFC 2487 SMTP Service Extension for Secure SMTP over TLS → 3207
RFC 2554 SMTP Service Extension for Authentication → 4954
RFC 2852 Deliver By SMTP Service Extension
RFC 2920 SMTP Service Extension for Command Pipelining
RFC 3030 SMTP Service Extensions for Transmission of Large and Binary MIME Messages
RFC 3207 SMTP Service Extension for Secure SMTP over Transport Layer Security
RFC 3461 Simple Mail Transfer Protocol (SMTP) Service Extension for Delivery Status Notifications (DSNs)
RFC 3885 SMTP Service Extension for Message Tracking
RFC 4954 SMTP Service Extension for Authentication
SASL
RFC 6152 SMTP Service 拡張 for 8-bit MIME Transport
RFC 9422 The LIMITS SMTP Service Extension
国際化
RFC 4952 Overview and Framework for Internationalized Email → 6530
RFC 5336 SMTP 拡張 for Internationalized Email Addresses → 6531
RFC 5504 Downgrading Mechanism for Email Address Internationalization
RFC 5983 Mailing Lists and Internationalized Email Addresses → 6783
RFC 6530 Overview and Framework for Internationalized Email
RFC 6531 SMTP 拡張 for Internationalized Email
RFC 6532 Internationalized Email Headers
RFC 6783 Mailing Lists and Non-ASCII Addresses
RFC 1846 SMTP 521 Reply Code
RFC 1892 The Multipart/Report Content Type for the Reporting of Mail System Administrative Messages → 3462
RFC 1893 Enhanced Mail System Status Codes → 3463
RFC 1894 An Extensible Message Format for Delivery Status Notifications → 3464
RFC 2645 ON-DEMAND MAIL RELAY (ODMR) SMTP with Dynamic IP Addresses
RFC 3462 The Multipart/Report Content Type for the Reporting of Mail System Administrative Messages
RFC 3463 Enhanced Mail System Status Codes
RFC 3464 An Extensible Message Format for Delivery Status Notifications
RFC 3798 Message Disposition Notification
RFC 3848 ESMTP and LMTP Transmission Types Registration
RFC 7504 SMTP 521 and 556 Reply Codes