RFC indices related to the Internet Mail

Table of Contents

• RFCs and Internet Drafts
  • About Protocol State
  • Host-to-host mail transfer(SMTP)
  • Client-to-host communication(POP/IMAP/ACAP)
  • Message Format
  • MIME
  • Security
  • Internationalization
  • Miscellaneous
• IANA
• Other indices
• Search
• About this page

RFCs and Internet Drafts

About Protocol State

• S: Standard Protocol
• DS: Draft Standard Protocol
• PS: Proposed Standard Protocol
• E: Experimental Protocol
• I: Informational Protocol
• H: Historic Protocol
• BCP: Best Current Practice
• U: Unknown

Host-to-host mail transfer(SMTP)

• SMTP and the Service Extensions
  • 1652: SMTP Service Extension for 8bit-MIMEtransport [DS]
  • 1830: SMTP Service Extensions for Transmission of Large and Binary MIME Messages [E]
  • 1845: SMTP Service Extension for Checkpoint/Restart [E]
  • 1846: SMTP 521 Reply Code [E]
  • 1870: SMTP Service Extension for Message Size Declaration [S, STD0010]
  • 1985: SMTP Service Extension for Remote Message Queue Starting [PS]
  • 2034: SMTP Service Extension for Returning Enhanced Error Codes [PS]
  • 2554: SMTP Service Extension for Authentication [PS]
  • 2645: ON-DEMAND MAIL RELAY (ODMR) SMTP with Dynamic IP Addresses [PS]
  • 2821: Simple Mail Transfer Protocol [PS]
  • 2852: Deliver By SMTP Service Extension [PS]
  • 2920: SMTP Service Extension for Command Pipelining [S, STD0060]
  • 3030: SMTP Service Extensions for Transmission of Large and Binary MIME Messages [PS]
  • 3207: SMTP Service Extension for Secure SMTP over TLS [PS]
  • 3461: SMTP Service Extension for Delivery Status Notifications [DS]
  • 3463: Enhanced Mail System Status Codes [DS]
  • 3464: An Extensible Message Format for Delivery Status Notifications [DS]
  • 3865: A No Soliciting SMTP Service Extension [PS]
  • 3885: SMTP Service Extension for Message Tracking [PS]
  • 3974: SMTP Operational Experience in Mixed IPv4/v6 Environments [I]
• Others
  • 0976: UUCP Mail Interchange Format Standard [U]
  • 1047: Duplicate messages and SMTP [U]
  • 1090: SMTP on X.25 [U]
  • 2033: Local Mail Transfer Protocol [I]
  • 2442: The Batch SMTP Media Type [I]
  • 2505: Anti-Spam Recommendations for SMTP MTAs [BCP, BCP0030]
  • 2524: Neda's Efficient Mail Submission and Delivery (EMSD) Protocol Specification Version 1.3 [I]
  • 3848: ESMTP and LMTP Transmission Types Registration [PS]
  • 3887: Message Tracking Query Protocol [PS]
  • 3888: Message Tracking Model and Requirements [I]
  • Also see "Client-to-host communication - Posting"

Client-to-host communication(POP/IMAP/ACAP)

• POP
  • 1082: Post Office Protocol: Version 3: Extended service offerings [U]
  • 1734: POP3 AUTHentication command [PS]
  • 1939: Post Office Protocol - Version 3 [S, STD0053]
  • 1957: Some Observations on Implementations of the Post Office Protocol (POP3) [I]
  • 2195: IMAP/POP AUTHorize Extension for Simple Challenge/Response [PS]
  • 2384: POP URL Scheme [PS]
  • 2449: POP3 Extension Mechanism [PS]
  • 3206: The SYS and AUTH POP Response Codes [PS]
  • Also see "Security - Authentication (SASL, TLS)"
• IMAP
  • 1176: Interactive Mail Access Protocol: Version 2 [E]
  • 1731: IMAP4 Authentication Mechanisms [PS]
  • 1732: IMAP4 COMPATIBILITY WITH IMAP2 AND IMAP2BIS [I]
  • 1733: DISTRIBUTED ELECTRONIC MAIL MODELS IN IMAP4 [I]
  • 2061: IMAP4 COMPATIBILITY WITH IMAP2BIS [I]
  • 2062: Internet Message Access Protocol - Obsolete Syntax [PS]
  • 2086: IMAP4 ACL extension [PS]
  • 2087: IMAP4 QUOTA extension [PS]
  • 2088: IMAP4 non-synchronizing literals [PS]
  • 2177: IMAP4 IDLE command [PS]
  • 2180: IMAP4 Multi-Accessed Mailbox Practice [I]
  • 2192: IMAP URL Scheme [PS]
  • 2193: IMAP4 Mailbox Referrals [PS]
  • 2195: IMAP/POP AUTHorize Extension for Simple Challenge/Response [PS]
  • 2221: IMAP4 Login Referrals [PS]
  • 2342: IMAP4 Namespace [PS]
  • 2359: IMAP4 UIDPLUS extension [PS]
  • 2683: IMAP4 Implementation Recommendations [I]
  • 2971: IMAP4 ID extension [PS]
  • 3348: The Internet Message Action Protocol (IMAP4) Child Mailbox Extension [I]
  • 3501: INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1 [PS]
  • 3502: Internet Message Access Protocol (IMAP) - MULTIAPPEND Extension [PS]
  • 3503: Message Disposition Notification (MDN) profile for Internet Message Access Protocol (IMAP) [PS]
  • 3516: IMAP4 Binary Content Extension [PS]
  • 3691: Internet Message Access Protocol (IMAP) UNSELECT command [PS]
  • Also see "Security - Authentication (SASL, TLS)"
• ACAP(Application Configuration Access Protocol)
  • 2244: ACAP -- Application Configuration Access Protocol [PS]
  • 2636: Wireless Device Configuration (OTASP/OTAPA) via ACAP [I]
• Sieve
  • 3028: Sieve: A Mail Filtering Language [PS]
  • 3431: Sieve Extension: Relational Tests [PS]
  • 3598: Sieve Email Filtering -- Subaddress Extension [PS]
  • 3685: SIEVE Email Filtering: Spamtest and VirusTest Extensions [PS]
  • 3894: Sieve Extension: Copying Without Side Effects [PS]
• Posting
  • 1204: Message Posting Protocol (MPP) [E]
  • 4409: Message Submission for Mail [DS]
• Others
  • 1056: PCMAIL: A Distributed Mail System for Personal Computers [I]
  • 1339: Remote Mail Checking Protocol [E]
  • 3656: The Mailbox Update (MUPDATE) Distributed Mailbox Database Protocol [E]

Basic Message Format

• 0934: Proposed Standard for Message Encapsulation [U]
• 0976: UUCP Mail Interchange Format Standard [U]
• 1049: Content-type header field for Internet messages [S, STD0011]
• 1123: Requirements for Internet Hosts -- Application and Support [S, STD0003]
• 1137: Mapping Between Full RFC 822 and RFC 822 with Restricted Encoding [H]
• 1505: Encoding Header Field for Internet Messages [E]
• 2076: Common Internet Message Headers [I]
• 2822: Internet Message Format [PS]
• 3282: Content Language Headers [DS]
• 3458: Message Context for Internet Mail [PS]
• 3864: Registration Procedures for Message Header Fields [BCP]
• 3886: An Extensible Message Format for Message Tracking Responses [PS]

MIME(Multipurpose Internet Mail Extensions)

• 1344: Implications of MIME for Internet Mail Gateways [I]
• 1428: Transition from Just-Send-8 to 8bit-SMTP/MIME [I]
• 1437: The Extension of MIME Content-Types to a New Medium [I]
• 1524: A User Agent Configuration Mechanism For Multimedia Mail Format Information [I]
• 1740: MIME Encapsulation of Macintosh files - MacMIME [PS]
• 1741: MIME Content Type for BinHex Encoded Files [I]
• 1767: MIME Encapsulation of EDI Objects [PS]
• 1844: Multimedia E-mail (MIME) User Agent checklist [I]
• 1864: The Content-MD5 Header Field [DS]
• 1873: Message/External-Body Content-ID Access Type [E]
• 1894: An Extensible Message Format for Delivery Status Notifications [PS]
• 1896: The text/enriched MIME Content-type [I]
• 1927: Suggested Additional MIME Types for Associating Documents [I]
• 2017: Definition of the URL MIME External-Body Access-Type [PS]
• 2045: MIME(I): Format of Internet Message Bodies [DS]
• 2046: MIME(II): Media Types [DS]
• 2047: MIME(III): Message Header Extensions for Non-ASCII Text [DS]
• 2048: MIME(IV): Registration Procedures [BCP, BCP0013]
• 2049: MIME(V): Conformance Criteria and Examples [DS]
• 2077: The Model Primary Content Type for MIME [PS]
• 2183: Communicating Presentation Information in Internet Messages: The Content-Disposition Header Field [PS]
• 2231: MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and Continuations [PS]
• 2387: The MIME Multipart/Related Content-type [PS]
• 2388: Returning Values from Forms: multipart/form-data [PS]
• 2392: Content-ID and Message-ID Uniform Resource Locators [PS]
• 2503: MIME Types for Use with the ISO ILL Protocol [I]
• 2557: MIME Encapsulation of Aggregate Documents, such as HTML (MHTML) [PS]
• 2912: Indicating Media Features for MIME Content [PS]
• 2913: MIME Content Types in Media Feature Expressions [PS]
• 3462: The Multipart/Report Content Type for the Reporting of Mail System Administrative Messages [DS]
• 3676: The Text/Plain Format and DelSp Parameters [PS]
• 3798: Message Disposition Notification [DS]
• Also see "Internationalization"

Security

• Encryption Algorithm, Message-Digest
  • 1321: The MD5 Message-Digest Algorithm [I]
  • 1760: The S/KEY One-Time Password System [I]
  • 2144: The CAST-128 Encryption Algorithm [I]
  • 2268: A Description of the RC2(r) Encryption Algorithm [I]
  • 2612: The CAST-256 Encryption Algorithm [I]
  • 2743: Generic Security Service Application Program Interface Version 2, Update 1 [PS]
  • 2744: Generic Security Service API Version 2 [PS]
  • 2773: Encryption using KEA and SKIPJACK [E]
  • 3174: US Secure Hash Algorithm 1 (SHA1) [I]
  • 3447: Public-Key Cryptography Standards (PKCS) #1: RSA Cryptography Specifications Version 2.1 [I]
• Authentication (SASL, TLS)
  • 2104: HMAC: Keyed-Hashing for Message Authentication [I]
  • 2195: IMAP/POP AUTHorize Extension for Simple Challenge/Response [PS]
  • 2222: Simple Authentication and Security Layer (SASL) [PS]
  • 2245: Anonymous SASL Mechanism [PS]
  • 2246: The TLS Protocol Version 1.0 [PS]
  • 2444: The One-Time-Password SASL Mechanism [PS]
  • 2595: Using TLS with IMAP, POP3 and ACAP [PS]
  • 2743: Generic Security Service Application Program Interface Version 2, Update 1 [PS]
  • 2744: Generic Security Service API Version 2 : C-bindings [PS]
  • 2853: Generic Security Service API Version 2 [PS]
  • 2808: The SecurID(r) SASL Mechanism [I]
  • 2831: Using Digest Authentication as a SASL Mechanism [PS]
  • 2994: A Description of the MISTY1 Encryption Algorithm [I]
  • 3163: ISO/IEC 9798-3 Authentication SASL Mechanism [E]
  • 3546: Transport Layer Security (TLS) Extensions [PS]
• PEM(Privacy Enhancement for Internet Electronic Mail)
  • 1421: PEM-1: Encryption and Authentication [PS]
  • 1422: PEM-2: Certificate-Based Key Management [PS]
  • 1423: PEM-3: Algorithms, Modes, and Identifiers [PS]
  • 1424: PEM-4: Key Certification and Related Services [PS]
• MOSS(MIME Object Security Services)
  • 1847: Security Multiparts for MIME: Multipart/Signed and Multipart/Encrypted [PS]
  • 1848: MIME Object Security Services [PS]
  • 2480: Gateways and MIME Security Multiparts [PS]
• PGP(Pretty Good Privacy)
  • 1991: PGP Message Exchange Formats [I]
  • 2015: MIME Security with Pretty Good Privacy (PGP) [PS]
  • 2440: OpenPGP Message Format [PS]
  • 2726: PGP Authentication for RIPE Database Updates [PS]
  • 3156: MIME Security with OpenPGP [PS]
• S/MIME
  • 2311: S/MIME Version 2 Message Specification [I]
  • 2312: S/MIME Version 2 Certificate Handling [I]
  • 2314: PKCS #10: Certification Request Syntax Version 1.5 [I]
  • 2315: PKCS #7: Cryptographic Message Syntax Version 1.5 [I]
  • 2437: PKCS #1: RSA Cryptography Specifications Version 2.0 [I]
  • 2630: Cryptographic Message Syntax [PS]
  • 2631: Diffie-Hellman Key Agreement Method [PS]
  • 2634: Enhanced Security Services for S/MIME [PS]
  • 2785: Methods for Avoiding the "Small-Subgroup" Attacks on the Diffie-Hellman Key Agreement Method for S/MIME [I]
  • 2876: Use of the KEA and SKIPJACK Algorithms in CMS [I]
  • 2898: PKCS #5: Password-Based Cryptography Specification Version 2.0 [I]
  • 2984: Use of the CAST-128 Encryption Algorithm in S/MIME [PS]
  • 2985: PKCS #9: Selected Object Classes and Attribute Types [I]
  • 2986: PKCS #10: Certification Request Syntax Specification Version 1.7 [I]
  • 3058: Use of the IDEA Encryption Algorithm in CMS [I]
  • 3114: Implementing Company Classification Policy with the S/MIME Security Label [I]
  • 3125: Electronic Signature Policies [E]
  • 3126: Electronic Signature Formats for long term electronic signatures [I]
  • 3183: Domain Security Services using S/MIME [E]
  • 3185: Reuse of CMS Content Encryption Keys [PS]
  • 3211: Password-based Encryption for CMS [PS]
  • 3217: Triple-DES and RC2 Key Wrapping [I]
  • 3218: Preventing the Million Message Attack on Cryptographic Message Syntax [I]
  • 3278: Use of Elliptic Curve Cryptography (ECC) Algorithms in Cryptographic Message Syntax (CMS) [I]
  • 3274: Compressed Data Content Type for Cryptographic Message Syntax (CMS) [PS]
  • 3394: Advanced Encryption Standard (AES) Key Wrap Algorithm [I]
  • 3537: Wrapping a Hashed Message Authentication Code (HMAC) key with a Triple-Data Encryption Standard (DES) Key or an Advanced Encryption Standard (AES) Key[PS]
  • 3560: Use of the RSAES-OAEP Key Transport Algorithm in Cryptographic Message Syntax (CMS) [PS]
  • 3565: Use of the Advanced Encryption Standard (AES) Encryption Algorithm in Cryptographic Message Syntax (CMS) [PS]
  • 3657: Use of the Camellia Encryption Algorithm in Cryptographic Message Syntax (CMS) [PS]
  • 3850: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Certificate Handling [PS]
  • 3851: Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message Specification [PS]
  • 3852: Cryptographic Message Syntax (CMS) [PS]
  • 3853: S/MIME Advanced Encryption Standard (AES) Requirement for the Session Initiation Protocol (SIP) [PS]
  • 3854: Securing X.400 Content with Secure/Multipurpose Internet Mail Extensions (S/MIME) [PS]
  • 3855: Transporting Secure/Multipurpose Internet Mail Extensions (S/MIME) Objects in X.400 [PS]
• PKIX (Internet X.509 Public Key Infrastructure)
  • 2459: PKIX Certificate and CRL Profile [PS]
  • 2510: PKIX Certificate Management Protocols [PS]
  • 2511: Internet X.509 Certificate Request Message Format [PS]
  • 2527: PKIX Certificate Policy and Certification Practices Framework [I]
  • 2528: PKIX Representation of Key Exchange Algorithm (KEA) Keys in Internet X.509 Public Key Infrastructure Certificates [I]
  • 2559: PKIX Operational Protocols - LDAPv2 [PS]
  • 2560: PKIX Online Certificate Status Protocol - OCSP [PS]
  • 2585: PKIX Operational Protocols: FTP and HTTP [PS]
  • 2587: PKIX LDAPv2 Schema [PS]
  • 2797: Certificate Management Messages over CMS [PS]
  • 2875: Diffie-Hellman Proof-of-Possession Algorithms [PS]
  • 3029: PKIX Data Validation and Certification Server Protocols [E]
  • 3039: PKIX Qualified Certificates [PS]
  • 3161: PKIX Time Stamp Protocols (TSP) [PS]
  • 3279: Algorithms and Identifiers for the Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) Profile [PS]
  • 3280: PKIX Certificate and Certificate Revocation List (CRL) Profile [PS]
  • 3281: An Internet Attribute Certificate Profile
  • 3467: Internet X.509 Public Key Infrastructure Certificate Policy and Certification Practices Framework [I]
  • 3709: Internet X.509 Public Key Infrastructure: Logotypes in X.509 Certificates [PS]
  • 3739: Internet X.509 Public Key Infrastructure: Qualified Certificates Profile [PS]
  • 3779: X.509 Extensions for IP Addresses and AS Identifiers [PS]
  • 3820: Internet X.509 Public Key Infrastructure (PKI) Proxy Certificate Profile [PS]

Internationalization

• Character Sets and Languages
  • 1345: Character Mnemonics & Character Sets [I]
  • 1556: Handling of Bi-directional Texts in MIME [I]
  • 2130: The Report of the IAB Character Set Workshop held 29 February - 1 March, 1996 [I]
  • 2277: IETF Policy on Character Sets and Languages [BCP, BCP0018]
  • 2978: IANA Charset Registration Procedures [BCP, BCP0019]
  • 2987: Registration of Charset and Languages Media Features Tags [PS]
  • 3066: Tags for the Identification of Languages [BCP, BCP0047]
• Unicode
  • 1641: Using Unicode with MIME [E]
  • 1815: Character Sets ISO-10646 and ISO-10646-J-1 [I]
  • 2152: UTF-7: A Mail-Safe Transformation Format of Unicode [I]
  • 2482: Language Tagging in Unicode Plain Text [I]
  • 2781: UTF-16, an encoding of ISO 10646 [I]
  • 3629: UTF-8, a transformation format of ISO 10646 [STD, STD63]
• Japanese Character Encoding
  • 1468: Japanese Character Encoding for Internet Messages [I]
  • 1554: ISO-2022-JP-2: Multilingual Extension of ISO-2022-JP [I]
  • 2237: Japanese Character Encoding for Internet Messages [I]
• Character Encoding
  • 1456: Conventions for Encoding the Vietnamese Language VISCII [I]
  • 1489: Registration of a Cyrillic Character Set [I]
  • 1555: Hebrew Character Encoding for Internet Messages [I]
  • 1557: Korean Character Encoding for Internet Messages [I]
  • 1842: ASCII Printable Characters-Based Chinese Character Encoding for Internet Messages [I]
  • 1843: HZ - A Data Format for Exchanging Files of Arbitrarily Mixed Chinese and ASCII characters [I]
  • 1922: Chinese Character Encoding for Internet Messages [I]
  • 1947: Greek Character Encoding for Electronic Mail Messages [I]
  • 2319: Ukrainian Character Set KOI8-U [I]

Miscellaneous

• 1711: Classifications in E-mail Routing [I]
• 1855: Netiquette Guidelines [I, FYI0028]
• 2142: Mailbox Names for Common Services, Roles and Functions [PS]
• 2234: Augmented BNF for Syntax Specifications: ABNF [PS]
• 2368: The mailto URL scheme [PS]
• 2425: A MIME Content-Type for Directory Information [PS]
• 2426: vCard MIME Directory Profile [PS]
• 2635: DON'T SPEW A Set of Guidelines for Mass Unsolicited Mailings and Postings (spam*) [I]
• 3098: How to Advertise Responsibly Using E-Mail and Newsgroups or - how NOT to $$$$$ MAKE ENEMIES FAST! $$$$$ [I, FYI38]
• 3834: Recommendations for Automatic Responses to Electronic Mail [PS]
• Mailing List
  • 1211: Problems with the maintenance of large mailing lists [I]
  • 1429: Listserv Distribute Protocol [I]
  • 2369: The Use of URLs as Meta-Syntax for Core Mail List Commands and their Transport through Message Header Fields [PS]
  • 2919: List-Id: A Structured Field and Namespace for the Identification of Mailing Lists [PS]

IANA

• Character Sets
• Media Types Directory
• Mail Encoding Header Field Keywords (Mail Parameters)
• Transfer Encodings

Other indices

• Internet Mail Standards (Internet Mail Consortium)
• Standards & Technology (Worldtalk)
• RFCs (IETF)
• Internet-Drafts (IETF)