| 6530 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko | Proposed Standard | February 2012 |
| 5730 | Extensible Provisioning Protocol (EPP)S. Hollenbeck | Internet Standard | August 2009 |
| 5672 | RFC 4871 DomainKeys Identified Mail (DKIM) Signatures -- UpdateD. Crocker, Ed. · obsoleted by RFC 6376 | Proposed Standard | August 2009 |
| 5598 | Internet Mail ArchitectureD. Crocker | Informational | July 2009 |
| 5408 | Identity-Based Encryption Architecture and Supporting Data StructuresG. Appenzeller, L. Martin, M. Schertler | Informational | January 2009 |
| 5337 | Internationalized Delivery Status and Disposition NotificationsC. Newman, A. Melnikov, Ed. · obsoleted by RFC 6533 | Experimental | September 2008 |
| 5336 | SMTP Extension for Internationalized Email AddressesJ. Yao, Ed., W. Mao, Ed. · obsoleted by RFC 6531 | Experimental | September 2008 |
| 5335 | Internationalized Email HeadersA. Yang, Ed. · obsoleted by RFC 6532 | Experimental | September 2008 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5280 | Internet X.509 Public Key Infrastructure Certificate and Certificate Revocation List (CRL) ProfileD. Cooper, S. Santesson, S. Farrell, S. Boeyen, R. Housley, W. Polk | Proposed Standard | May 2008 |
| 5248 | A Registry for SMTP Enhanced Mail System Status CodesT. Hansen, J. Klensin | Best Current Practice | June 2008 |
| 5230 | Sieve Email Filtering: Vacation ExtensionT. Showalter, N. Freed, Ed. | Proposed Standard | January 2008 |
| 5218 | What Makes for a Successful Protocol?D. Thaler, B. Aboba | Informational | July 2008 |
| 5198 | Unicode Format for Network InterchangeJ. Klensin, M. Padlipsky | Proposed Standard | March 2008 |
| 5183 | Sieve Email Filtering: Environment ExtensionN. Freed | Proposed Standard | May 2008 |
| 5068 | Email Submission Operations: Access and Accountability RequirementsC. Hutzler, D. Crocker, P. Resnick, E. Allman, T. Finch | Best Current Practice | November 2007 |
| 5022 | Media Server Control Markup Language (MSCML) and ProtocolJ. Van Dyke, E. Burger, Ed., A. Spitzer | Informational | September 2007 |
| 5000 | Internet Official Protocol StandardsRFC Editor · obsoleted by RFC 7100 | Historic | May 2008 |
| 4987 | TCP SYN Flooding Attacks and Common MitigationsW. Eddy | Informational | August 2007 |
| 4954 | SMTP Service Extension for AuthenticationR. Siemborski, Ed., A. Melnikov, Ed. | Proposed Standard | July 2007 |
| 4952 | Overview and Framework for Internationalized EmailJ. Klensin, Y. Ko · obsoleted by RFC 6530 | Informational | July 2007 |
| 4930 | Extensible Provisioning Protocol (EPP)S. Hollenbeck · obsoleted by RFC 5730 | Draft Standard | May 2007 |
| 4902 | Integrity, Privacy, and Security in Open Pluggable Edge Services (OPES) for SMTPM. Stecher | Informational | May 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 |
| 4865 | SMTP Submission Service Extension for Future Message ReleaseG. White, G. Vaudreuil | Proposed Standard | May 2007 |
| 4823 | FTP Transport for Secure Peer-to-Peer Business Data Interchange over the InternetT. Harding, R. Scott | Informational | April 2007 |
| 4786 | Operation of Anycast ServicesJ. Abley, K. Lindqvist | Best Current Practice | December 2006 |
| 4722 | Media Server Control Markup Language (MSCML) and ProtocolJ. Van Dyke, E. Burger, Ed., A. Spitzer · obsoleted by RFC 5022 | Informational | November 2006 |
| 4686 | Analysis of Threats Motivating DomainKeys Identified Mail (DKIM)J. Fenton | Informational | September 2006 |
| 4550 | Internet Email to Support Diverse Service Environments (Lemonade) ProfileS. Maes, A. Melnikov · obsoleted by RFC 5550 | Proposed Standard | June 2006 |
| 4524 | COSINE LDAP/X.500 SchemaK. Zeilenga, Ed. | Proposed Standard | June 2006 |
| 4496 | Open Pluggable Edge Services (OPES) SMTP Use CasesM. Stecher, A. Barbir | Informational | May 2006 |
| 4472 | Operational Considerations and Issues with IPv6 DNSA. Durand, J. Ihren, P. Savola | Informational | April 2006 |
| 4468 | Message Submission BURL ExtensionC. Newman | Proposed Standard | May 2006 |
| 4416 | Goals for Internet Messaging to Support Diverse Service EnvironmentsJ. Wong, Ed. | Informational | February 2006 |
| 4408 | Sender Policy Framework (SPF) for Authorizing Use of Domains in E-Mail, Version 1M. Wong, W. Schlitt · obsoleted by RFC 7208 | Experimental | April 2006 |
| 4406 | Sender ID: Authenticating E-MailJ. Lyon, M. Wong | Historic | April 2006 |
| 4405 | SMTP Service Extension for Indicating the Responsible Submitter of an E-Mail MessageE. Allman, H. Katz | Historic | April 2006 |
| 4367 | What's in a Name: False Assumptions about DNS NamesJ. Rosenberg, Ed., IAB | Informational | February 2006 |
| 4356 | Mapping Between the Multimedia Messaging Service (MMS) and Internet MailR. Gellens | Proposed Standard | 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 |
| 4161 | Guidelines for Optional Services for Internet Fax GatewaysK. Mimura, K. Yokoyama, T. Satoh, K. Watanabe, C. Kanaide | Informational | September 2005 |
| 4141 | SMTP and MIME Extensions for Content ConversionK. Toyoda, D. Crocker | Proposed Standard | November 2005 |
| 4096 | Policy-Mandated Labels Such as "Adv:" in Email Subject Headers Considered Ineffective At BestC. Malamud | Informational | May 2005 |
| 4095 | Attaching Meaning to Solicitation Class KeywordsC. Malamud | Proposed Standard | May 2005 |
| 4038 | Application Aspects of IPv6 TransitionM-K. Shin, Ed., Y-G. Hong, J. Hagino, P. Savola, E. M. Castro | Informational | March 2005 |
| 4021 | Registration of Mail and MIME Header FieldsG. Klyne, J. Palme | Proposed Standard | March 2005 |
| 3974 | SMTP Operational Experience in Mixed IPv4/v6 EnvironmentsM. Nakamura, J. Hagino | Informational | January 2005 |
| 3965 | A Simple Mode of Facsimile Using Internet MailK. Toyoda, H. Ohno, J. Murai, D. Wing | Draft Standard | December 2004 |
| 3930 | The Protocol versus Document Points of View in Computer ProtocolsD. Eastlake 3rd | Informational | October 2004 |
| 3920 | Extensible Messaging and Presence Protocol (XMPP): CoreP. Saint-Andre, Ed. · obsoleted by RFC 6120 | Proposed Standard | October 2004 |
| 3885 | SMTP Service Extension for Message TrackingE. Allman, T. Hansen | Proposed Standard | September 2004 |
| 3865 | A No Soliciting Simple Mail Transfer Protocol (SMTP) Service ExtensionC. Malamud | Proposed Standard | September 2004 |
| 3864 | Registration Procedures for Message Header FieldsG. Klyne, M. Nottingham, J. Mogul | Best Current Practice | September 2004 |
| 3854 | Securing X.400 Content with Secure/Multipurpose Internet Mail Extensions (S/MIME)P. Hoffman, C. Bonatti, A. Eggen | Proposed Standard | July 2004 |
| 3848 | ESMTP and LMTP Transmission Types RegistrationC. Newman | Draft Standard | July 2004 |
| 3805 | Printer MIB v2R. Bergman, H. Lewis, I. McDonald | Proposed Standard | June 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 |
| 3730 | Extensible Provisioning Protocol (EPP)S. Hollenbeck · obsoleted by RFC 4930 | Proposed Standard | March 2004 |
| 3696 | Application Techniques for Checking and Transformation of NamesJ. Klensin | Informational | February 2004 |
| 3676 | The Text/Plain Format and DelSp ParametersR. Gellens | Proposed Standard | February 2004 |
| 3675 | .sex Considered DangerousD. Eastlake 3rd | Informational | February 2004 |
| 3599 | Request for Comments Summary RFC Numbers 3500-3599S. Ginoza | Informational | December 2003 |
| 3552 | Guidelines for Writing RFC Text on Security ConsiderationsE. Rescorla, B. Korver | Best Current Practice | July 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 |
| 3459 | Critical Content Multi-purpose Internet Mail Extensions (MIME) ParameterE. Burger | Proposed Standard | January 2003 |
| 3395 | Remote Network Monitoring MIB Protocol Identifier Reference ExtensionsA. Bierman, C. Bucci, R. Dietz, A. Warth | Proposed Standard | September 2002 |
| 3390 | Increasing TCP's Initial WindowM. Allman, S. Floyd, C. Partridge | Proposed Standard | November 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 |
| 3297 | Content Negotiation for Messaging Services based on EmailG. Klyne, R. Iwazaki, D. Crocker | Proposed Standard | July 2002 |
| 3249 | Implementers Guide for Facsimile Using Internet MailV. Cancio, M. Moldovan, H. Tamura, D. Wing | Informational | September 2002 |
| 3207 | SMTP Service Extension for Secure SMTP over Transport Layer SecurityP. Hoffman | Proposed Standard | February 2002 |
| 3205 | On the use of HTTP as a SubstrateK. Moore · obsoleted by RFC 9205 | Best Current Practice | February 2002 |
| 3155 | End-to-end Performance Implications of Links with ErrorsS. Dawkins, G. Montenegro, M. Kojo, V. Magret, N. Vaidya | Best Current Practice | August 2001 |
| 2822 | Internet Message FormatP. Resnick, Ed. · obsoleted by RFC 5322 | Proposed Standard | April 2001 |
| 2800 | Internet Official Protocol StandardsJ. Reynolds, R. Braden, S. Ginoza · obsoleted by RFC 2900 | Historic | May 2001 |