| 1939 | Post Office Protocol - Version 3J. Myers, M. Rose | Internet Standard | May 1996 |
| 2026 | The Internet Standards Process -- Revision 3S. Bradner | Best Current Practice | October 1996 |
| 2119 | Key words for use in RFCs to Indicate Requirement LevelsS. Bradner | Best Current Practice | March 1997 |
| 2142 | Mailbox Names for Common Services, Roles and FunctionsD. Crocker | Proposed Standard | May 1997 |
| 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 |
| 3464 | An Extensible Message Format for Delivery Status NotificationsK. Moore, G. Vaudreuil | Draft Standard | January 2003 |
| 3501 | INTERNET MESSAGE ACCESS PROTOCOL - VERSION 4rev1M. Crispin · obsoleted by RFC 9051 | Proposed Standard | March 2003 |
| 3912 | WHOIS Protocol SpecificationL. Daigle | Draft Standard | September 2004 |
| 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 |
| 5321 | Simple Mail Transfer ProtocolJ. Klensin | Draft Standard | October 2008 |
| 5322 | Internet Message FormatP. Resnick, Ed. | Draft Standard | October 2008 |
| 5598 | Internet Mail ArchitectureD. Crocker | Informational | July 2009 |
| 5617 | DomainKeys Identified Mail (DKIM) Author Domain Signing Practices (ADSP)E. Allman, J. Fenton, M. Delany, J. Levine | Historic | August 2009 |
| 5741 | RFC Streams, Headers, and BoilerplatesL. Daigle, Ed., O. Kolkman, Ed., IAB · obsoleted by RFC 7841 | Informational | December 2009 |
| 5965 | An Extensible Format for Email Feedback ReportsY. Shafranovich, J. Levine, M. Kucherawy | Proposed Standard | August 2010 |
| 6376 | DomainKeys Identified Mail (DKIM) SignaturesD. Crocker, Ed., T. Hansen, Ed., M. Kucherawy, Ed. | Internet Standard | September 2011 |
| 6430 | Email Feedback Report Type Value: not-spamK. Li, B. Leiba | Proposed Standard | November 2011 |
| 6449 | Complaint Feedback Loop Operational RecommendationsJ. Falk, Ed. | Informational | November 2011 |
| 6590 | Redaction of Potentially Sensitive Data from Mail Abuse ReportsJ. Falk, Ed., M. Kucherawy, Ed. | Proposed Standard | April 2012 |
| 6591 | Authentication Failure Reporting Using the Abuse Reporting FormatH. Fontana | Proposed Standard | April 2012 |
| 6651 | Extensions to DomainKeys Identified Mail (DKIM) for Failure ReportingM. Kucherawy | Proposed Standard | June 2012 |
| 6652 | Sender Policy Framework (SPF) Authentication Failure Reporting Using the Abuse Reporting FormatS. Kitterman | Proposed Standard | June 2012 |