| 8324 | DNS Privacy, Authorization, Special Uses, Encoding, Characters, Matching, and Root Structure: Time for Another Look?J. Klensin | Informational | February 2018 |
| 6950 | Architectural Considerations on Application Features in the DNSJ. Peterson, O. Kolkman, H. Tschofenig, B. Aboba | Informational | October 2013 |
| 5336 | SMTP Extension for Internationalized Email AddressesJ. Yao, Ed., W. Mao, Ed. · obsoleted by RFC 6531 | Experimental | September 2008 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5000 | Internet Official Protocol StandardsRFC Editor · obsoleted by RFC 7100 | Historic | May 2008 |
| 4409 | Message Submission for MailR. Gellens, J. Klensin · obsoleted by RFC 6409 | Draft Standard | April 2006 |
| 3974 | SMTP Operational Experience in Mixed IPv4/v6 EnvironmentsM. Nakamura, J. Hagino | Informational | January 2005 |
| 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 |
| 2800 | Internet Official Protocol StandardsJ. Reynolds, R. Braden, S. Ginoza · obsoleted by RFC 2900 | Historic | May 2001 |
| 2782 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie, L. Esibov | Proposed Standard | February 2000 |
| 2532 | Extended Facsimile Using Internet MailL. Masinter, D. Wing | Proposed Standard | March 1999 |
| 2476 | Message SubmissionR. Gellens, J. Klensin · obsoleted by RFC 4409 | Proposed Standard | December 1998 |
| 2219 | Use of DNS Aliases for Network ServicesM. Hamilton, R. Wright | Best Current Practice | October 1997 |
| 2142 | Mailbox Names for Common Services, Roles and FunctionsD. Crocker | Proposed Standard | May 1997 |
| 2053 | The AM (Armenia) DomainE. Der-Danieliantz | Informational | October 1996 |
| 2052 | A DNS RR for specifying the location of services (DNS SRV)A. Gulbrandsen, P. Vixie · obsoleted by RFC 2782 | Experimental | October 1996 |
| 1912 | Common DNS Operational and Configuration ErrorsD. Barr | Informational | February 1996 |
| 1711 | Classifications in E-mail RoutingJ. Houttuin | Informational | October 1994 |
| 1703 | Principles of Operation for the TPC.INT Subdomain: Radio Paging -- Technical ProceduresM. Rose | Informational | October 1994 |
| 1486 | An Experiment in Remote PrintingM. Rose, C. Malamud · obsoleted by RFC 1528, RFC 1529 | Experimental | July 1993 |
| 1480 | The US DomainA. Cooper, J. Postel | Informational | June 1993 |
| 1427 | SMTP Service Extension for Message Size DeclarationJ. Klensin, N. Freed, Ed., K. Moore · obsoleted by RFC 1653 | Proposed Standard | February 1993 |
| 1426 | SMTP Service Extension for 8bit-MIMEtransportJ. Klensin, N. Freed, Ed., M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 1652 | Proposed Standard | February 1993 |
| 1386 | The US DomainA. Cooper, J. Postel · obsoleted by RFC 1480 | Informational | December 1992 |
| 1123 | Requirements for Internet Hosts - Application and SupportR. Braden, Ed. | Internet Standard | October 1989 |
| 1118 | Hitchhikers guide to the InternetE. Krol | Informational | September 1989 |
| 1101 | DNS encoding of network names and other typesP. Mockapetris | Unknown | April 1989 |
| 1035 | Domain names - implementation and specificationP. Mockapetris | Internet Standard | November 1987 |
| 1034 | Domain names - concepts and facilitiesP. Mockapetris | Internet Standard | November 1987 |
| 1033 | Domain Administrators Operations GuideM. Lottor | Unknown | November 1987 |
| 1032 | Domain administrators guideM.K. Stahl | Unknown | November 1987 |
| 1031 | MILNET name domain transitionW.D. Lazear | Unknown | November 1987 |
| 1012 | Bibliography of Request For Comments 1 through 999J.K. Reynolds, J. Postel | Informational | June 1987 |
| 1011 | Official Internet protocolsJ.K. Reynolds, J. Postel | Unknown | May 1987 |
| 1001 | Protocol standard for a NetBIOS service on a TCP/UDP transport: Concepts and methodsNetBIOS Working Group in the Defense Advanced Research Projects Agency, Internet Activities Board, End-to-End Services Task Force | Internet Standard | March 1987 |
| 991 | Official ARPA-Internet protocolsJ.K. Reynolds, J. Postel · obsoleted by RFC 1011 | Unknown | November 1986 |
| 973 | Domain system changes and observationsP. Mockapetris · obsoleted by RFC 1034, RFC 1035 | Unknown | January 1986 |