| 9996 | Media Types for Protocol BuffersM. Kucherawy, Ed., W. Kumari, R. Sloan | Informational | July 2026 |
| 9990 | Domain-Based Message Authentication, Reporting, and Conformance (DMARC) Aggregate ReportingA. Brotman, Ed. | Proposed Standard | May 2026 |
| 9788 | Header Protection for Cryptographically Protected EmailD. K. Gillmor, B. Hoeneisen, A. Melnikov | Proposed Standard | August 2025 |
| 9787 | Guidance on End-to-End Email SecurityD. K. Gillmor, Ed., A. Melnikov, Ed., B. Hoeneisen, Ed. | Informational | August 2025 |
| 9676 | LEX: A Uniform Resource Name (URN) Namespace for Sources of LawP. Spinosa, E. Francesconi, C. Lupo | Informational | May 2025 |
| 9671 | Sieve Email Filtering: Extension for Processing Calendar AttachmentsK. Murchison, R. Signes, M. Horsfall | Proposed Standard | October 2024 |
| 9239 | Updates to ECMAScript Media TypesM. Miller, M. Borins, M. Bynens, B. Farias | Informational | May 2022 |
| 9193 | Sensor Measurement Lists (SenML) Fields for Indicating Data Value Content-FormatA. Keränen, C. Bormann | Proposed Standard | June 2022 |
| 9116 | A File Format to Aid in Security Vulnerability DisclosureE. Foudil, Y. Shafranovich | Informational | April 2022 |
| 9112 | HTTP/1.1R. Fielding, Ed., M. Nottingham, Ed., J. Reschke, Ed. | Internet Standard | June 2022 |
| 9078 | Reaction: Indicating Summary Reaction to a MessageD. Crocker, R. Signes, N. Freed | Experimental | August 2021 |
| 9051 | Internet Message Access Protocol (IMAP) - Version 4rev2A. Melnikov, Ed., B. Leiba, Ed. | Proposed Standard | August 2021 |
| 8970 | IMAP4 Extension: Message Preview GenerationM. Slusarz | Proposed Standard | December 2020 |
| 8951 | Clarification of Enrollment over Secure Transport (EST): Transfer Encodings and ASN.1M. Richardson, T. Werner, W. Pan | Proposed Standard | November 2020 |
| 8949 | Concise Binary Object Representation (CBOR)C. Bormann, P. Hoffman | Internet Standard | December 2020 |
| 8866 | SDP: Session Description ProtocolA. Begen, P. Kyzivat, C. Perkins, M. Handley | Proposed Standard | January 2021 |
| 8621 | The JSON Meta Application Protocol (JMAP) for MailN. Jenkins, C. Newman | Proposed Standard | August 2019 |
| 8601 | Message Header Field for Indicating Message Authentication StatusM. Kucherawy | Proposed Standard | May 2019 |
| 8580 | Sieve Extension: File Carbon Copy (FCC)K. Murchison, B. Gondwana | Proposed Standard | May 2019 |
| 8551 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 4.0 Message SpecificationJ. Schaad, B. Ramsdell, S. Turner | Proposed Standard | April 2019 |
| 8322 | Resource-Oriented Lightweight Information Exchange (ROLIE)J. Field, S. Banghart, D. Waltermire | Proposed Standard | February 2018 |
| 8262 | Content-ID Header Field in the Session Initiation Protocol (SIP)C. Holmberg, I. Sedlacek | Proposed Standard | October 2017 |
| 8255 | Multiple Language Content TypeN. Tomkinson, N. Borenstein | Proposed Standard | October 2017 |
| 8187 | Indicating Character Encoding and Language for HTTP Header Field ParametersJ. Reschke | Proposed Standard | September 2017 |
| 8098 | Message Disposition NotificationT. Hansen, Ed., A. Melnikov, Ed. | Internet Standard | February 2017 |
| 8095 | Services Provided by IETF Transport Protocols and Congestion Control MechanismsG. Fairhurst, Ed., B. Trammell, Ed., M. Kuehlewind, Ed. | Informational | March 2017 |
| 7960 | Interoperability Issues between Domain-based Message Authentication, Reporting, and Conformance (DMARC) and Indirect Email FlowsF. Martin, Ed., E. Lear, Ed., T. Draegen, Ed., E. Zwicky, Ed., K. Andersen, Ed. | Informational | September 2016 |
| 7940 | Representing Label Generation Rulesets Using XMLK. Davies, A. Freytag | Proposed Standard | August 2016 |
| 7763 | The text/markdown Media TypeS. Leonard | Informational | March 2016 |
| 7681 | Email Exchange of Secondary School TranscriptsJ. Davin | Informational | October 2015 |
| 7601 | Message Header Field for Indicating Message Authentication StatusM. Kucherawy · obsoleted by RFC 8601 | Proposed Standard | August 2015 |
| 7515 | JSON Web Signature (JWS)M. Jones, J. Bradley, N. Sakimura | Proposed Standard | May 2015 |
| 7489 | Domain-based Message Authentication, Reporting, and Conformance (DMARC)M. Kucherawy, Ed., E. Zwicky, Ed. · obsoleted by RFC 9989, RFC 9990, RFC 9991 | Informational | March 2015 |
| 7444 | Security Labels in Internet EmailK. Zeilenga, A. Melnikov | Informational | February 2015 |
| 7303 | XML Media TypesH. Thompson, C. Lilley | Proposed Standard | July 2014 |
| 7252 | The Constrained Application Protocol (CoAP)Z. Shelby, K. Hartke, C. Bormann | Proposed Standard | June 2014 |
| 7231 | Hypertext Transfer Protocol (HTTP/1.1): Semantics and ContentR. Fielding, Ed., J. Reschke, Ed. · obsoleted by RFC 9110 | Proposed Standard | June 2014 |
| 7230 | Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and RoutingR. Fielding, Ed., J. Reschke, Ed. · obsoleted by RFC 9110, RFC 9112 | Proposed Standard | June 2014 |
| 7111 | URI Fragment Identifiers for the text/csv Media TypeM. Hausenblas, E. Wilde, J. Tennison | Informational | January 2014 |
| 7103 | Advice for Safe Handling of Malformed MessagesM. Kucherawy, G. Shapiro, N. Freed | Informational | January 2014 |
| 7072 | A Reputation Query ProtocolN. Borenstein, M. Kucherawy | Proposed Standard | November 2013 |
| 7071 | A Media Type for Reputation InterchangeN. Borenstein, M. Kucherawy | Proposed Standard | November 2013 |
| 7070 | An Architecture for Reputation ReportingN. Borenstein, M. Kucherawy | Proposed Standard | November 2013 |
| 7049 | Concise Binary Object Representation (CBOR)C. Bormann, P. Hoffman · obsoleted by RFC 8949 | Proposed Standard | October 2013 |
| 7030 | Enrollment over Secure TransportM. Pritikin, Ed., P. Yee, Ed., D. Harkins, Ed. | Proposed Standard | October 2013 |
| 7001 | Message Header Field for Indicating Message Authentication StatusM. Kucherawy · obsoleted by RFC 7601 | Proposed Standard | September 2013 |
| 6931 | Additional XML Security Uniform Resource Identifiers (URIs)D. Eastlake 3rd · obsoleted by RFC 9231 | Proposed Standard | April 2013 |
| 6920 | Naming Things with HashesS. Farrell, D. Kutscher, C. Dannewitz, B. Ohlman, A. Keranen, P. Hallam-Baker | Proposed Standard | April 2013 |
| 6858 | Simplified POP and IMAP Downgrading for Internationalized EmailA. Gulbrandsen | Proposed Standard | March 2013 |
| 6857 | Post-Delivery Message Downgrading for Internationalized Email MessagesK. Fujiwara | Proposed Standard | March 2013 |
| 6856 | Post Office Protocol Version 3 (POP3) Support for UTF-8R. Gellens, C. Newman, J. Yao, K. Fujiwara | Proposed Standard | March 2013 |
| 6839 | Additional Media Type Structured Syntax SuffixesT. Hansen, A. Melnikov | Informational | January 2013 |
| 6838 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin, T. Hansen | Best Current Practice | January 2013 |
| 6729 | Indicating Email Handling States in Trace FieldsD. Crocker, M. Kucherawy | Proposed Standard | September 2012 |
| 6726 | FLUTE - File Delivery over Unidirectional TransportT. Paila, R. Walsh, M. Luby, V. Roca, R. Lehtonen | Proposed Standard | November 2012 |
| 6690 | Constrained RESTful Environments (CoRE) Link FormatZ. Shelby | Proposed Standard | August 2012 |
| 6652 | Sender Policy Framework (SPF) Authentication Failure Reporting Using the Abuse Reporting FormatS. Kitterman | Proposed Standard | June 2012 |
| 6648 | Deprecating the "X-" Prefix and Similar Constructs in Application ProtocolsP. Saint-Andre, D. Crocker, M. Nottingham | Best Current Practice | June 2012 |
| 6591 | Authentication Failure Reporting Using the Abuse Reporting FormatH. Fontana | Proposed Standard | April 2012 |
| 6560 | One-Time Password (OTP) Pre-AuthenticationG. Richards | Proposed Standard | April 2012 |
| 6537 | Host Identity Protocol Distributed Hash Table InterfaceJ. Ahrenholz | Experimental | February 2012 |
| 6533 | Internationalized Delivery Status and Disposition NotificationsT. Hansen, Ed., C. Newman, A. Melnikov | Proposed Standard | February 2012 |
| 6532 | Internationalized Email HeadersA. Yang, S. Steele, N. Freed | Proposed Standard | February 2012 |
| 6531 | SMTP Extension for Internationalized EmailJ. Yao, W. Mao | Proposed Standard | February 2012 |
| 6530 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko | Proposed Standard | February 2012 |
| 6522 | The Multipart/Report Media Type for the Reporting of Mail System Administrative MessagesM. Kucherawy, Ed. | Internet Standard | January 2012 |
| 6505 | A Mixer Control Package for the Media Control Channel FrameworkS. McGlashan, T. Melanchuk, C. Boulton | Proposed Standard | March 2012 |
| 6449 | Complaint Feedback Loop Operational RecommendationsJ. Falk, Ed. | Informational | November 2011 |
| 6381 | The 'Codecs' and 'Profiles' Parameters for "Bucket" Media TypesR. Gellens, D. Singer, P. Frojdh | Proposed Standard | August 2011 |
| 6377 | DomainKeys Identified Mail (DKIM) and Mailing ListsM. Kucherawy | Best Current Practice | September 2011 |
| 6376 | DomainKeys Identified Mail (DKIM) SignaturesD. Crocker, Ed., T. Hansen, Ed., M. Kucherawy, Ed. | Internet Standard | September 2011 |
| 6365 | Terminology Used in Internationalization in the IETFP. Hoffman, J. Klensin | Best Current Practice | September 2011 |
| 6350 | vCard Format SpecificationS. Perreault | Proposed Standard | August 2011 |
| 6295 | RTP Payload Format for MIDIJ. Lazzaro, J. Wawrzynek | Proposed Standard | June 2011 |
| 6231 | An Interactive Voice Response (IVR) Control Package for the Media Control Channel FrameworkS. McGlashan, T. Melanchuk, C. Boulton | Proposed Standard | May 2011 |
| 6230 | Media Control Channel FrameworkC. Boulton, T. Melanchuk, S. McGlashan | Proposed Standard | May 2011 |
| 6152 | SMTP Service Extension for 8-bit MIME TransportJ. Klensin, N. Freed, M. Rose, D. Crocker, Ed. | Internet Standard | March 2011 |
| 6109 | La Posta Elettronica Certificata - Italian Certified Electronic MailC. Petrucci, F. Gennai, A. Shahin, A. Vinciarelli | Informational | April 2011 |
| 6068 | The 'mailto' URI SchemeM. Duerst, L. Masinter, J. Zawinski | Proposed Standard | October 2010 |
| 6047 | iCalendar Message-Based Interoperability Protocol (iMIP)A. Melnikov, Ed. | Proposed Standard | December 2010 |
| 5987 | Character Set and Language Encoding for Hypertext Transfer Protocol (HTTP) Header Field ParametersJ. Reschke · obsoleted by RFC 8187 | Historic | August 2010 |
| 5965 | An Extensible Format for Email Feedback ReportsY. Shafranovich, J. Levine, M. Kucherawy | Proposed Standard | August 2010 |
| 5849 | The OAuth 1.0 ProtocolE. Hammer-Lahav, Ed. · obsoleted by RFC 6749 | Informational | April 2010 |
| 5825 | Displaying Downgraded Messages for Email Address InternationalizationK. Fujiwara, B. Leiba · obsoleted by RFC 6530 | Experimental | April 2010 |
| 5751 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.2 Message SpecificationB. Ramsdell, S. Turner · obsoleted by RFC 8551 | Proposed Standard | January 2010 |
| 5738 | IMAP Support for UTF-8P. Resnick, C. Newman · obsoleted by RFC 6855 | Experimental | March 2010 |
| 5721 | POP3 Support for UTF-8R. Gellens, C. Newman · obsoleted by RFC 6856 | Experimental | February 2010 |
| 5703 | Sieve Email Filtering: MIME Part Tests, Iteration, Extraction, Replacement, and EnclosureT. Hansen, C. Daboo | Proposed Standard | October 2009 |
| 5621 | Message Body Handling in the Session Initiation Protocol (SIP)G. Camarillo | Proposed Standard | September 2009 |
| 5616 | Streaming Internet Messaging AttachmentsN. Cook | Informational | August 2009 |
| 5598 | Internet Mail ArchitectureD. Crocker | Informational | July 2009 |
| 5547 | A Session Description Protocol (SDP) Offer/Answer Mechanism to Enable File TransferM. Garcia-Martin, M. Isomaki, G. Camarillo, S. Loreto, P. Kyzivat | Proposed Standard | May 2009 |
| 5545 | Internet Calendaring and Scheduling Core Object Specification (iCalendar)B. Desruisseaux, Ed. | Proposed Standard | September 2009 |
| 5544 | Syntax for Binding Documents with Time-StampsA. Santoni | Informational | February 2010 |
| 5537 | Netnews Architecture and ProtocolsR. Allbery, Ed., C. Lindsey | Proposed Standard | November 2009 |
| 5536 | Netnews Article FormatK. Murchison, Ed., C. Lindsey, D. Kohn | Proposed Standard | November 2009 |
| 5524 | Extended URLFETCH for Binary and Converted PartsD. Cridland | Proposed Standard | May 2009 |
| 5504 | Downgrading Mechanism for Email Address InternationalizationK. Fujiwara, Ed., Y. Yoneya, Ed. · obsoleted by RFC 6530 | Experimental | March 2009 |
| 5451 | Message Header Field for Indicating Message Authentication StatusM. Kucherawy · obsoleted by RFC 7001 | Proposed Standard | April 2009 |
| 5408 | Identity-Based Encryption Architecture and Supporting Data StructuresG. Appenzeller, L. Martin, M. Schertler | Informational | January 2009 |
| 5402 | Compressed Data within an Internet Electronic Data Interchange (EDI) MessageT. Harding, Ed. | Informational | February 2010 |
| 5337 | Internationalized Delivery Status and Disposition NotificationsC. Newman, A. Melnikov, Ed. · obsoleted by RFC 6533 | Experimental | September 2008 |
| 5335 | Internationalized Email HeadersA. Yang, Ed. · obsoleted by RFC 6532 | Experimental | September 2008 |
| 5334 | Ogg Media TypesI. Goncalves, S. Pfeiffer, C. Montgomery | Proposed Standard | September 2008 |
| 5322 | Internet Message FormatP. Resnick, Ed. | Draft Standard | October 2008 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5255 | Internet Message Access Protocol InternationalizationC. Newman, A. Gulbrandsen, A. Melnikov | Proposed Standard | June 2008 |
| 5230 | Sieve Email Filtering: Vacation ExtensionT. Showalter, N. Freed, Ed. | Proposed Standard | January 2008 |
| 5228 | Sieve: An Email Filtering LanguageP. Guenther, Ed., T. Showalter, Ed. | Proposed Standard | January 2008 |
| 5196 | Session Initiation Protocol (SIP) User Agent Capability Extension to Presence Information Data Format (PIDF)M. Lonnfors, K. Kiss | Proposed Standard | September 2008 |
| 5173 | Sieve Email Filtering: Body ExtensionJ. Degener, P. Guenther | Proposed Standard | April 2008 |
| 5147 | URI Fragment Identifiers for the text/plain Media TypeE. Wilde, M. Duerst | Proposed Standard | April 2008 |
| 5126 | CMS Advanced Electronic Signatures (CAdES)D. Pinkas, N. Pope, J. Ross | Informational | March 2008 |
| 5092 | IMAP URL SchemeA. Melnikov, Ed., C. Newman | Proposed Standard | November 2007 |
| 4976 | Relay Extensions for the Message Sessions Relay Protocol (MSRP)C. Jennings, R. Mahy, A. B. Roach | Proposed Standard | September 2007 |
| 4975 | The Message Session Relay Protocol (MSRP)B. Campbell, Ed., R. Mahy, Ed., C. Jennings, Ed. | Proposed Standard | September 2007 |
| 4952 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko · obsoleted by RFC 6530 | Informational | July 2007 |
| 4949 | Internet Security Glossary, Version 2R. Shirey | Informational | August 2007 |
| 4880 | OpenPGP Message FormatJ. Callas, L. Donnerhacke, H. Finney, D. Shaw, R. Thayer · obsoleted by RFC 9580 | Proposed Standard | November 2007 |
| 4871 | DomainKeys Identified Mail (DKIM) SignaturesE. Allman, J. Callas, M. Delany, M. Libbey, J. Fenton, M. Thomas · obsoleted by RFC 6376 | Proposed Standard | May 2007 |
| 4855 | Media Type Registration of RTP Payload FormatsS. Casner | Proposed Standard | February 2007 |
| 4823 | FTP Transport for Secure Peer-to-Peer Business Data Interchange over the InternetT. Harding, R. Scott | Informational | April 2007 |
| 4790 | Internet Application Protocol Collation RegistryC. Newman, M. Duerst, A. Gulbrandsen | Proposed Standard | March 2007 |
| 4743 | Using NETCONF over the Simple Object Access Protocol (SOAP)T. Goddard | Historic | December 2006 |
| 4716 | The Secure Shell (SSH) Public Key File FormatJ. Galbraith, R. Thayer | Informational | November 2006 |
| 4707 | Netnews Administration System (NAS)P. Grau, V. Heinau, H. Schlichting, R. Schuettler | Experimental | October 2006 |
| 4695 | RTP Payload Format for MIDIJ. Lazzaro, J. Wawrzynek · obsoleted by RFC 6295 | Proposed Standard | November 2006 |
| 4662 | A Session Initiation Protocol (SIP) Event Notification Extension for Resource ListsA. B. Roach, B. Campbell, J. Rosenberg | Proposed Standard | August 2006 |
| 4648 | The Base16, Base32, and Base64 Data EncodingsS. Josefsson | Proposed Standard | October 2006 |
| 4539 | Media Type Registration for the Society of Motion Picture and Television Engineers (SMPTE) Material Exchange Format (MXF)T. Edwards | Informational | May 2006 |
| 4483 | A Mechanism for Content Indirection in Session Initiation Protocol (SIP) MessagesE. Burger, Ed. | Proposed Standard | May 2006 |
| 4469 | Internet Message Access Protocol (IMAP) CATENATE ExtensionP. Resnick | Proposed Standard | April 2006 |
| 4468 | Message Submission BURL ExtensionC. Newman | Proposed Standard | May 2006 |
| 4462 | Generic Security Service Application Program Interface (GSS-API) Authentication and Key Exchange for the Secure Shell (SSH) ProtocolJ. Hutzelman, J. Salowey, J. Galbraith, V. Welch | Proposed Standard | May 2006 |
| 4416 | Goals for Internet Messaging to Support Diverse Service EnvironmentsJ. Wong, Ed. | Informational | February 2006 |
| 4393 | MIME Type Registrations for 3GPP2 Multimedia FilesH. Garudadri | Proposed Standard | March 2006 |
| 4367 | What's in a Name: False Assumptions about DNS NamesJ. Rosenberg, Ed., IAB | Informational | February 2006 |
| 4324 | Calendar Access Protocol (CAP)D. Royer, G. Babics, S. Mansour | Experimental | December 2005 |
| 4289 | Multipurpose Internet Mail Extensions (MIME) Part Four: Registration ProceduresN. Freed, J. Klensin | Best Current Practice | December 2005 |
| 4288 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin · obsoleted by RFC 6838 | Best Current Practice | December 2005 |
| 4281 | The Codecs Parameter for "Bucket" Media TypesR. Gellens, D. Singer, P. Frojdh · obsoleted by RFC 6381 | Proposed Standard | December 2005 |
| 4263 | Media Subtype Registration for Media Type text/troffB. Lilly | Informational | January 2006 |
| 4249 | Implementer-Friendly Specification of Message and MIME-Part Header Fields and Field ComponentsB. Lilly | Informational | January 2006 |
| 4240 | Basic Network Media Services with SIPE. Burger, Ed., J. Van Dyke, A. Spitzer | Informational | December 2005 |
| 4239 | Internet Voice Messaging (IVM)S. McRae, G. Parsons | Proposed Standard | November 2005 |
| 4227 | Using the Simple Object Access Protocol (SOAP) in Blocks Extensible Exchange Protocol (BEEP)E. O'Tuathail, M. Rose | Proposed Standard | January 2006 |
| 4185 | National and Local Characters for DNS Top Level Domain (TLD) NamesJ. Klensin | Informational | October 2005 |
| 4169 | Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA) Version-2V. Torvinen, J. Arkko, M. Naslund | Informational | November 2005 |
| 4155 | The application/mbox Media TypeE. Hall | Informational | September 2005 |
| 4130 | MIME-Based Secure Peer-to-Peer Business Data Interchange Using HTTP, Applicability Statement 2 (AS2)D. Moberg, R. Drummond | Proposed Standard | July 2005 |
| 4112 | Electronic Commerce Modeling Language (ECML) Version 2 SpecificationD. Eastlake 3rd | Proposed Standard | June 2005 |
| 4102 | Registration of the text/red MIME Sub-TypeP. Jones | Proposed Standard | June 2005 |
| 4073 | Protecting Multiple Contents with the Cryptographic Message Syntax (CMS)R. Housley | Proposed Standard | May 2005 |
| 4047 | MIME Sub-type Registrations for Flexible Image Transport System (FITS)S. Allen, D. Wells | Informational | April 2005 |
| 4040 | RTP Payload Format for a 64 kbit/s Transparent CallR. Kreuter | Proposed Standard | April 2005 |
| 4024 | Voice Messaging Client BehaviourG. Parsons, J. Maruszak | Informational | July 2005 |
| 4021 | Registration of Mail and MIME Header FieldsG. Klyne, J. Palme | Proposed Standard | March 2005 |
| 3987 | Internationalized Resource Identifiers (IRIs)M. Duerst, M. Suignard | Proposed Standard | January 2005 |
| 3977 | Network News Transfer Protocol (NNTP)C. Feather | Proposed Standard | October 2006 |
| 3930 | The Protocol versus Document Points of View in Computer ProtocolsD. Eastlake 3rd | Informational | October 2004 |
| 3922 | Mapping the Extensible Messaging and Presence Protocol (XMPP) to Common Presence and Instant Messaging (CPIM)P. Saint-Andre | Proposed Standard | October 2004 |
| 3910 | The SPIRITS (Services in PSTN requesting Internet Services) ProtocolV. Gurbani, Ed., A. Brusilovsky, I. Faynberg, J. Gato, H. Lu, M. Unmehopa | Proposed Standard | October 2004 |
| 3892 | The Session Initiation Protocol (SIP) Referred-By MechanismR. Sparks | Proposed Standard | September 2004 |
| 3887 | Message Tracking Query ProtocolT. Hansen | Proposed Standard | September 2004 |
| 3886 | An Extensible Message Format for Message Tracking ResponsesE. Allman | Proposed Standard | September 2004 |
| 3885 | SMTP Service Extension for Message TrackingE. Allman, T. Hansen | Proposed Standard | September 2004 |
| 3864 | Registration Procedures for Message Header FieldsG. Klyne, M. Nottingham, J. Mogul | Best Current Practice | September 2004 |
| 3863 | Presence Information Data Format (PIDF)H. Sugano, S. Fujimoto, G. Klyne, A. Bateman, W. Carr, J. Peterson | Proposed Standard | August 2004 |
| 3862 | Common Presence and Instant Messaging (CPIM): Message FormatG. Klyne, D. Atkins | Proposed Standard | August 2004 |
| 3851 | Secure/Multipurpose Internet Mail Extensions (S/MIME) Version 3.1 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 5751 | Proposed Standard | July 2004 |
| 3839 | MIME Type Registrations for 3rd Generation Partnership Project (3GPP) Multimedia filesR. Castagno, D. Singer | Proposed Standard | July 2004 |
| 3834 | Recommendations for Automatic Responses to Electronic MailK. Moore | Proposed Standard | August 2004 |
| 3801 | Voice Profile for Internet Mail - version 2 (VPIMv2)G. Vaudreuil, G. Parsons | Draft Standard | June 2004 |
| 3798 | Message Disposition NotificationT. Hansen, Ed., G. Vaudreuil, Ed. · obsoleted by RFC 8098 | Draft Standard | May 2004 |
| 3795 | Survey of IPv4 Addresses in Currently Deployed IETF Application Area Standards Track and Experimental DocumentsR. Sofia, P. Nesser, II | Informational | June 2004 |
| 3773 | High-Level Requirements for Internet Voice MailE. Candell | Informational | June 2004 |
| 3745 | MIME Type Registrations for JPEG 2000 (ISO/IEC 15444)D. Singer, R. Clark, D. Lee | Proposed Standard | April 2004 |
| 3720 | Internet Small Computer Systems Interface (iSCSI)J. Satran, K. Meth, C. Sapuntzakis, M. Chadalapaka, E. Zeidner · obsoleted by RFC 7143 | Proposed Standard | April 2004 |
| 3676 | The Text/Plain Format and DelSp ParametersR. Gellens | Proposed Standard | February 2004 |
| 3656 | The Mailbox Update (MUPDATE) Distributed Mailbox Database ProtocolR. Siemborski | Experimental | December 2003 |
| 3629 | UTF-8, a transformation format of ISO 10646F. Yergeau | Internet Standard | November 2003 |
| 3599 | Request for Comments Summary RFC Numbers 3500-3599S. Ginoza | Informational | December 2003 |
| 3555 | MIME Type Registration of RTP Payload FormatsS. Casner, P. Hoschka · obsoleted by RFC 4855, RFC 4856 | Proposed Standard | July 2003 |
| 3548 | The Base16, Base32, and Base64 Data EncodingsS. Josefsson, Ed. · obsoleted by RFC 4648 | Informational | July 2003 |
| 3536 | Terminology Used in Internationalization in the IETFP. Hoffman · obsoleted by RFC 6365 | Informational | May 2003 |
| 3516 | IMAP4 Binary Content ExtensionL. Nerenberg | Proposed Standard | April 2003 |
| 3502 | Internet Message Access Protocol (IMAP) - MULTIAPPEND ExtensionM. Crispin | Proposed Standard | March 2003 |
| 3501 | INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1M. Crispin · obsoleted by RFC 9051 | Proposed Standard | March 2003 |
| 3470 | Guidelines for the Use of Extensible Markup Language (XML) within IETF ProtocolsS. Hollenbeck, M. Rose, L. Masinter | Best Current Practice | January 2003 |
| 3464 | An Extensible Message Format for Delivery Status NotificationsK. Moore, G. Vaudreuil | Draft Standard | January 2003 |
| 3459 | Critical Content Multi-purpose Internet Mail Extensions (MIME) ParameterE. Burger | Proposed Standard | January 2003 |
| 3435 | Media Gateway Control Protocol (MGCP) Version 1.0F. Andreasen, B. Foster | Informational | January 2003 |
| 3391 | The MIME Application/Vnd.pwg-multiplexed Content-TypeR. Herriot | Informational | December 2002 |
| 3340 | The Application Exchange CoreM. Rose, G. Klyne, D. Crocker | Historic | July 2002 |
| 3335 | MIME-based Secure Peer-to-Peer Business Data Interchange over the InternetT. Harding, R. Drummond, C. Shih | Proposed Standard | September 2002 |
| 3310 | Hypertext Transfer Protocol (HTTP) Digest Authentication Using Authentication and Key Agreement (AKA)A. Niemi, J. Arkko, V. Torvinen | Informational | September 2002 |
| 3302 | Tag Image File Format (TIFF) - image/tiff MIME Sub-type RegistrationG. Parsons, J. Rafferty | Draft Standard | September 2002 |
| 3298 | Service in the Public Switched Telephone Network/Intelligent Network (PSTN/IN) Requesting InTernet Service (SPIRITS) Protocol RequirementsI. Faynberg, J. Gato, H. Lu, L. Slutsman | Informational | September 2002 |
| 3297 | Content Negotiation for Messaging Services based on EmailG. Klyne, R. Iwazaki, D. Crocker | Proposed Standard | July 2002 |
| 3288 | Using the Simple Object Access Protocol (SOAP) in Blocks Extensible Exchange Protocol (BEEP)E. O'Tuathail, M. Rose · obsoleted by RFC 4227 | Proposed Standard | June 2002 |
| 3283 | Guide to Internet CalendaringB. Mahoney, G. Babics, A. Taler | Informational | July 2002 |
| 3282 | Content Language HeadersH. Alvestrand | Draft Standard | May 2002 |
| 3275 | (Extensible Markup Language) XML-Signature Syntax and ProcessingD. Eastlake 3rd, J. Reagle, D. Solo | Draft Standard | March 2002 |
| 3252 | Binary Lexical Octet Ad-hoc TransportH. Kennedy | Informational | 1 April 2002 |
| 3250 | Tag Image File Format Fax eXtended (TIFF-FX) - image/tiff-fx MIME Sub-type RegistrationL. McIntyre, G. Parsons, J. Rafferty · obsoleted by RFC 3950 | Proposed Standard | September 2002 |
| 3230 | Instance Digests in HTTPJ. Mogul, A. Van Hoff · obsoleted by RFC 9530 | Proposed Standard | January 2002 |
| 3229 | Delta encoding in HTTPJ. Mogul, B. Krishnamurthy, F. Douglis, A. Feldmann, Y. Goland, A. van Hoff, D. Hellerstein | Proposed Standard | January 2002 |
| 3204 | MIME media types for ISUP and QSIG ObjectsE. Zimmerer, J. Peterson, A. Vemuri, L. Ong, F. Audet, M. Watson, M. Zonoun | Proposed Standard | December 2001 |
| 3126 | Electronic Signature Formats for long term electronic signaturesD. Pinkas, J. Ross, N. Pope · obsoleted by RFC 5126 | Informational | September 2001 |
| 3117 | On the Design of Application ProtocolsM. Rose | Informational | November 2001 |
| 3080 | The Blocks Extensible Exchange Protocol CoreM. Rose | Proposed Standard | March 2001 |
| 3075 | XML-Signature Syntax and ProcessingD. Eastlake 3rd, J. Reagle, D. Solo · obsoleted by RFC 3275 | Proposed Standard | March 2001 |
| 3073 | Portable Font Resource (PFR) - application/font-tdpfr MIME Sub-type RegistrationJ. Collins | Informational | March 2001 |
| 3053 | IPv6 Tunnel BrokerA. Durand, P. Fasano, I. Guardini, D. Lento | Informational | January 2001 |
| 3047 | RTP Payload Format for ITU-T Recommendation G.722.1P. Luthi · obsoleted by RFC 5577 | Proposed Standard | January 2001 |
| 3030 | SMTP Service Extensions for Transmission of Large and Binary MIME MessagesG. Vaudreuil | Proposed Standard | December 2000 |
| 3028 | Sieve: A Mail Filtering LanguageT. Showalter · obsoleted by RFC 5228, RFC 5429 | Proposed Standard | January 2001 |
| 3023 | XML Media TypesM. Murata, S. St. Laurent, D. Kohn · obsoleted by RFC 7303 | Proposed Standard | January 2001 |
| 2978 | IANA Charset Registration ProceduresN. Freed, J. Postel | Best Current Practice | October 2000 |
| 2967 | TISDAG - Technical Infrastructure for Swedish Directory Access GatewaysL. Daigle, R. Hedberg | Informational | October 2000 |
| 2938 | Identifying Composite Media FeaturesG. Klyne, L. Masinter | Proposed Standard | September 2000 |
| 2936 | HTTP MIME Type Handler DetectionD. Eastlake 3rd, C. Smith, D. Soroka | Informational | September 2000 |
| 2913 | MIME Content Types in Media Feature ExpressionsG. Klyne | Proposed Standard | September 2000 |
| 2912 | Indicating Media Features for MIME ContentG. Klyne | Proposed Standard | September 2000 |
| 2911 | Internet Printing Protocol/1.1: Model and SemanticsT. Hastings, Ed., R. Herriot, R. deBry, S. Isaacson, P. Powell · obsoleted by RFC 8011 | Proposed Standard | September 2000 |
| 2901 | Guide to Administrative Procedures of the Internet InfrastructureZ. Wenzel, J. Klensin, R. Bush, S. Huter | Informational | August 2000 |
| 2849 | The LDAP Data Interchange Format (LDIF) - Technical SpecificationG. Good | Proposed Standard | June 2000 |
| 2848 | The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call ServicesS. Petrack, L. Conroy | Proposed Standard | June 2000 |
| 2828 | Internet Security GlossaryR. Shirey · obsoleted by RFC 4949 | Informational | May 2000 |
| 2825 | A Tangled Web: Issues of I18N, Domain Names, and the Other Internet protocolsIAB, L. Daigle, Ed. | Informational | May 2000 |
| 2822 | Internet Message FormatP. Resnick, Ed. · obsoleted by RFC 5322 | Proposed Standard | April 2001 |
| 2821 | Simple Mail Transfer ProtocolJ. Klensin, Ed. · obsoleted by RFC 5321 | Proposed Standard | April 2001 |
| 2802 | Digital Signatures for the v1.0 Internet Open Trading Protocol (IOTP)K. Davidson, Y. Kawatsura | Informational | April 2000 |
| 2801 | Internet Open Trading Protocol - IOTP Version 1.0D. Burdett | Informational | April 2000 |
| 2781 | UTF-16, an encoding of ISO 10646P. Hoffman, F. Yergeau | Informational | February 2000 |
| 2779 | Instant Messaging / Presence Protocol RequirementsM. Day, S. Aggarwal, G. Mohr, J. Vincent | Informational | February 2000 |
| 2703 | Protocol-independent Content Negotiation FrameworkG. Klyne | Informational | September 1999 |
| 2693 | SPKI Certificate TheoryC. Ellison, B. Frantz, B. Lampson, R. Rivest, B. Thomas, T. Ylonen | Experimental | September 1999 |
| 2660 | The Secure HyperText Transfer ProtocolE. Rescorla, A. Schiffman | Historic | August 1999 |
| 2653 | CIP Transport ProtocolsJ. Allen, P. Leach, R. Hedberg | Proposed Standard | August 1999 |
| 2646 | The Text/Plain Format ParameterR. Gellens, Ed. · obsoleted by RFC 3676 | Proposed Standard | August 1999 |
| 2633 | S/MIME Version 3 Message SpecificationB. Ramsdell, Ed. · obsoleted by RFC 3851 | Proposed Standard | June 1999 |
| 2617 | HTTP Authentication: Basic and Digest Access AuthenticationJ. Franks, P. Hallam-Baker, J. Hostetler, S. Lawrence, P. Leach, A. Luotonen, L. Stewart · obsoleted by RFC 7235, RFC 7615, RFC 7616, RFC 7617 | Draft Standard | June 1999 |
| 2616 | Hypertext Transfer Protocol -- HTTP/1.1R. Fielding, J. Gettys, J. Mogul, H. Frystyk, L. Masinter, P. Leach, T. Berners-Lee · obsoleted by RFC 7230, RFC 7231, RFC 7232, RFC 7233, RFC 7234, RFC 7235 | Draft Standard | June 1999 |
| 2566 | Internet Printing Protocol/1.0: Model and SemanticsR. deBry, T. Hastings, R. Herriot, S. Isaacson, P. Powell · obsoleted by RFC 2911 | Experimental | April 1999 |
| 2557 | MIME Encapsulation of Aggregate Documents, such as HTML (MHTML)J. Palme, A. Hopmann, N. Shelness | Proposed Standard | March 1999 |
| 2552 | Architecture for the Information Brokerage in the ACTS Project GAIAM. Blinov, M. Bessonov, C. Clissmann | Informational | April 1999 |
| 2535 | Domain Name System Security ExtensionsD. Eastlake 3rd · obsoleted by RFC 4033, RFC 4034, RFC 4035 | Proposed Standard | March 1999 |
| 2483 | URI Resolution Services Necessary for URN ResolutionM. Mealling, R. Daniel | Experimental | January 1999 |
| 2480 | Gateways and MIME Security MultipartsN. Freed | Proposed Standard | January 1999 |
| 2447 | iCalendar Message-Based Interoperability Protocol (iMIP)F. Dawson, S. Mansour, S. Silverberg · obsoleted by RFC 6047 | Proposed Standard | November 1998 |
| 2445 | Internet Calendaring and Scheduling Core Object Specification (iCalendar)F. Dawson, D. Stenerson · obsoleted by RFC 5545 | Proposed Standard | November 1998 |
| 2442 | The Batch SMTP Media TypeN. Freed, D. Newman, J. Belissent, M. Hoy | Informational | November 1998 |
| 2426 | vCard MIME Directory ProfileF. Dawson, T. Howes · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2425 | A MIME Content-Type for Directory InformationT. Howes, M. Smith, F. Dawson · obsoleted by RFC 6350 | Proposed Standard | September 1998 |
| 2421 | Voice Profile for Internet Mail - version 2G. Vaudreuil, G. Parsons · obsoleted by RFC 3801 | Proposed Standard | September 1998 |
| 2397 | The "data" URL schemeL. Masinter | Proposed Standard | August 1998 |
| 2392 | Content-ID and Message-ID Uniform Resource LocatorsE. Levinson | Proposed Standard | August 1998 |
| 2387 | The MIME Multipart/Related Content-typeE. Levinson | Proposed Standard | August 1998 |
| 2378 | The CCSO Nameserver (Ph) ArchitectureR. Hedberg, P. Pomes | Informational | September 1998 |
| 2376 | XML Media TypesE. Whitehead, M. Murata · obsoleted by RFC 3023 | Informational | July 1998 |
| 2311 | S/MIME Version 2 Message SpecificationS. Dusse, P. Hoffman, B. Ramsdell, L. Lundblade, L. Repka | Historic | March 1998 |
| 2306 | Tag Image File Format (TIFF) - F Profile for FacsimileG. Parsons, J. Rafferty | Informational | March 1998 |
| 2302 | Tag Image File Format (TIFF) - image/tiff MIME Sub-type RegistrationG. Parsons, J. Rafferty, S. Zilles · obsoleted by RFC 3302 | Proposed Standard | March 1998 |
| 2299 | Request for Comments SummaryA. Ramos | Informational | January 1999 |
| 2298 | An Extensible Message Format for Message Disposition NotificationsR. Fajman · obsoleted by RFC 3798 | Proposed Standard | March 1998 |
| 2279 | UTF-8, a transformation format of ISO 10646F. Yergeau · obsoleted by RFC 3629 | Draft Standard | January 1998 |
| 2278 | IANA Charset Registration ProceduresN. Freed, J. Postel · obsoleted by RFC 2978 | Informational | January 1998 |
| 2237 | Japanese Character Encoding for Internet MessagesK. Tamaru | Informational | November 1997 |
| 2231 | MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and ContinuationsN. Freed, K. Moore | Proposed Standard | November 1997 |
| 2229 | A Dictionary Server ProtocolR. Faith, B. Martin | Informational | October 1997 |
| 2199 | Request for Comments Summary RFC Numbers 2100-2199A. Ramos | Informational | January 1998 |
| 2192 | IMAP URL SchemeC. Newman · obsoleted by RFC 5092 | Proposed Standard | September 1997 |
| 2184 | MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and ContinuationsN. Freed, K. Moore · obsoleted by RFC 2231 | Proposed Standard | August 1997 |
| 2183 | Communicating Presentation Information in Internet Messages: The Content-Disposition Header FieldR. Troost, S. Dorner, K. Moore, Ed. | Proposed Standard | August 1997 |
| 2165 | Service Location ProtocolJ. Veizades, E. Guttman, C. Perkins, S. Kaplan | Proposed Standard | June 1997 |
| 2161 | A MIME Body Part for ODAH. Alvestrand | Experimental | January 1998 |
| 2159 | A MIME Body Part for FAXH. Alvestrand | Proposed Standard | January 1998 |
| 2158 | X.400 Image Body PartsH. Alvestrand | Proposed Standard | January 1998 |
| 2156 | MIXER (Mime Internet X.400 Enhanced Relay): Mapping between X.400 and RFC 822/MIMES. Kille | Proposed Standard | January 1998 |
| 2152 | UTF-7 A Mail-Safe Transformation Format of UnicodeD. Goldsmith, M. Davis | Informational | May 1997 |
| 2130 | The Report of the IAB Character Set Workshop held 29 February - 1 March, 1996C. Weider, C. Preston, K. Simonsen, H. Alvestrand, R. Atkinson, M. Crispin, P. Svanberg | Informational | April 1997 |
| 2110 | MIME E-mail Encapsulation of Aggregate Documents, such as HTML (MHTML)J. Palme, A. Hopmann · obsoleted by RFC 2557 | Proposed Standard | March 1997 |
| 2099 | Request for Comments Summary RFC Numbers 2000-2099J. Elliott | Informational | March 1997 |
| 2083 | PNG (Portable Network Graphics) Specification Version 1.0T. Boutell | Historic | March 1997 |
| 2077 | The Model Primary Content Type for Multipurpose Internet Mail ExtensionsS. Nelson, C. Parks, Mitra | Proposed Standard | January 1997 |
| 2070 | Internationalization of the Hypertext Markup LanguageF. Yergeau, G. Nicol, G. Adams, M. Duerst · obsoleted by RFC 2854 | Historic | January 1997 |
| 2068 | Hypertext Transfer Protocol -- HTTP/1.1R. Fielding, J. Gettys, J. Mogul, H. Frystyk, T. Berners-Lee · obsoleted by RFC 2616 | Proposed Standard | January 1997 |
| 2060 | Internet Message Access Protocol - Version 4rev1M. Crispin · obsoleted by RFC 3501 | Proposed Standard | December 1996 |
| 2049 | Multipurpose Internet Mail Extensions (MIME) Part Five: Conformance Criteria and ExamplesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2048 | Multipurpose Internet Mail Extensions (MIME) Part Four: Registration ProceduresN. Freed, J. Klensin, J. Postel · obsoleted by RFC 4288, RFC 4289 | Best Current Practice | November 1996 |
| 2047 | MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII TextK. Moore | Draft Standard | November 1996 |
| 2046 | Multipurpose Internet Mail Extensions (MIME) Part Two: Media TypesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 1849 | "Son of 1036": News Article Format and TransmissionH. Spencer · obsoleted by RFC 5536, RFC 5537 | Historic | March 2010 |