| 9228 | Delivered-To Email Header FieldD. Crocker, Ed. | Experimental | April 2022 |
| 9078 | Reaction: Indicating Summary Reaction to a MessageD. Crocker, R. Signes, N. Freed | Experimental | August 2021 |
| 9057 | Email Author Header FieldD. Crocker | Experimental | June 2021 |
| 8553 | DNS Attrleaf Changes: Fixing Specifications That Use Underscored Node NamesD. Crocker | Best Current Practice | March 2019 |
| 8552 | Scoped Interpretation of DNS Resource Records through "Underscored" Naming of Attribute LeavesD. Crocker | Best Current Practice | March 2019 |
| 7704 | An IETF with Much Diversity and Professional ConductD. Crocker, N. Clark | Informational | November 2015 |
| 7221 | Handling of Internet-Drafts by IETF Working GroupsA. Farrel, D. Crocker, Ed. | Informational | April 2014 |
| 6729 | Indicating Email Handling States in Trace FieldsD. Crocker, M. Kucherawy | Proposed Standard | September 2012 |
| 6648 | Deprecating the "X-" Prefix and Similar Constructs in Application ProtocolsP. Saint-Andre, D. Crocker, M. Nottingham | Best Current Practice | June 2012 |
| 6647 | Email Greylisting: An Applicability Statement for SMTPM. Kucherawy, D. Crocker | Proposed Standard | June 2012 |
| 6410 | Reducing the Standards Track to Two Maturity LevelsR. Housley, D. Crocker, E. Burger | Best Current Practice | October 2011 |
| 6376 | DomainKeys Identified Mail (DKIM) SignaturesD. Crocker, Ed., T. Hansen, Ed., M. Kucherawy, Ed. | Internet Standard | September 2011 |
| 6152 | SMTP Service Extension for 8-bit MIME TransportJ. Klensin, N. Freed, M. Rose, D. Crocker, Ed. | Internet Standard | March 2011 |
| 5863 | DomainKeys Identified Mail (DKIM) Development, Deployment, and OperationsT. Hansen, E. Siegel, P. Hallam-Baker, D. Crocker | Informational | May 2010 |
| 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 |
| 5585 | DomainKeys Identified Mail (DKIM) Service OverviewT. Hansen, D. Crocker, P. Hallam-Baker | Informational | July 2009 |
| 5234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell | Internet Standard | January 2008 |
| 5068 | Email Submission Operations: Access and Accountability RequirementsC. Hutzler, D. Crocker, P. Resnick, E. Allman, T. Finch | Best Current Practice | November 2007 |
| 4234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell · obsoleted by RFC 5234 | Draft Standard | October 2005 |
| 4143 | Facsimile Using Internet Mail (IFAX) Service of ENUMK. Toyoda, D. Crocker | Proposed Standard | November 2005 |
| 4142 | Full-mode Fax Profile for Internet Mail (FFPIM)D. Crocker, G. Klyne | Proposed Standard | November 2005 |
| 4141 | SMTP and MIME Extensions for Content ConversionK. Toyoda, D. Crocker | Proposed Standard | November 2005 |
| 3343 | The Application Exchange (APEX) Presence ServiceM. Rose, G. Klyne, D. Crocker | Historic | May 2003 |
| 3341 | The Application Exchange (APEX) Access ServiceM. Rose, G. Klyne, D. Crocker | Historic | July 2002 |
| 3340 | The Application Exchange CoreM. Rose, G. Klyne, D. Crocker | Historic | July 2002 |
| 3297 | Content Negotiation for Messaging Services based on EmailG. Klyne, R. Iwazaki, D. Crocker | Proposed Standard | July 2002 |
| 2234 | Augmented BNF for Syntax Specifications: ABNFD. Crocker, Ed., P. Overell · obsoleted by RFC 4234 | Proposed Standard | November 1997 |
| 2142 | Mailbox Names for Common Services, Roles and FunctionsD. Crocker | Proposed Standard | May 1997 |
| 1869 | SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 2821 | Internet Standard | November 1995 |
| 1845 | SMTP Service Extension for Checkpoint/RestartD. Crocker, N. Freed, A. Cargille | Experimental | September 1995 |
| 1775 | To Be "On" the InternetD. Crocker | Informational | March 1995 |
| 1767 | MIME Encapsulation of EDI ObjectsD. Crocker | Proposed Standard | March 1995 |
| 1741 | MIME Content Type for BinHex Encoded FilesP. Faltstrom, D. Crocker, E. Fair | Informational | December 1994 |
| 1740 | MIME Encapsulation of Macintosh Files - MacMIMEP. Faltstrom, D. Crocker, E. Fair | Proposed Standard | December 1994 |
| 1692 | Transport Multiplexing Protocol (TMux)P. Cameron, D. Crocker, D. Cohen, J. Postel | Historic | August 1994 |
| 1652 | SMTP Service Extension for 8bit-MIMEtransportJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 6152 | Draft Standard | July 1994 |
| 1651 | SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 1869 | Draft Standard | July 1994 |
| 1627 | Network 10 Considered Harmful (Some Practices Shouldn't be Codified)E. Lear, E. Fair, D. Crocker, T. Kessler · obsoleted by RFC 1918 | Informational | July 1994 |
| 1603 | IETF Working Group Guidelines and ProceduresE. Huizer, D. Crocker · obsoleted by RFC 2418 | Informational | March 1994 |
| 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 |
| 1425 | SMTP Service ExtensionsJ. Klensin, N. Freed, Ed., M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 1651 | Proposed Standard | February 1993 |
| 822 | STANDARD FOR THE FORMAT OF ARPA INTERNET TEXT MESSAGESD. Crocker · obsoleted by RFC 2822 | Internet Standard | August 1982 |
| 735 | Revised Telnet byte macro optionD. Crocker, R.H. Gumpertz | Proposed Standard | November 1977 |
| 733 | Standard for the format of ARPA network text messagesD. Crocker, J. Vittal, K.T. Pogran, D.A. Henderson · obsoleted by RFC 822 | Unknown | November 1977 |
| 729 | Telnet byte macro optionD. Crocker · obsoleted by RFC 735 | Unknown | May 1977 |
| 726 | Remote Controlled Transmission and Echoing Telnet optionJ. Postel, D. Crocker | Proposed Standard | March 1977 |
| 724 | Proposed official standard for the format of ARPA Network messagesD. Crocker, K.T. Pogran, J. Vittal, D.A. Henderson · obsoleted by RFC 733 | Unknown | May 1977 |
| 720 | Address Specification Syntax for Network MailD. Crocker | Unknown | August 1976 |
| 658 | Telnet output linefeed dispositionD. Crocker | Historic | October 1974 |
| 657 | Telnet output vertical tab disposition optionD. Crocker | Historic | October 1974 |
| 656 | Telnet output vertical tabstops optionD. Crocker | Historic | October 1974 |
| 655 | Telnet output formfeed disposition optionD. Crocker | Historic | October 1974 |
| 654 | Telnet output horizontal tab disposition optionD. Crocker | Historic | October 1974 |
| 653 | Telnet output horizontal tabstops optionD. Crocker | Historic | October 1974 |
| 652 | Telnet output carriage-return disposition optionD. Crocker | Historic | October 1974 |
| 651 | Revised Telnet status optionD. Crocker · obsoleted by RFC 859 | Unknown | October 1974 |
| 645 | Network Standard Data Specification syntaxD. Crocker | Unknown | June 1974 |
| 615 | Proposed Network Standard Data Pathname syntaxD. Crocker · obsoleted by RFC 645 | Unknown | March 1974 |
| 585 | ARPANET users interest working group meetingD. Crocker, N. Neigus, E.J. Feinler, J. Iseli | Unknown | November 1973 |
| 584 | Charter for ARPANET Users Interest Working GroupJ. Iseli, D. Crocker, N. Neigus | Unknown | November 1973 |
| 581 | Corrections to RFC 560: Remote Controlled Transmission and Echoing Telnet OptionD. Crocker, J. Postel | Unknown | November 1973 |
| 577 | Mail priorityD. Crocker | Unknown | October 1973 |
| 560 | Remote Controlled Transmission and Echoing Telnet optionD. Crocker, J. Postel | Unknown | August 1973 |
| 539 | Thoughts on the mail protocol proposed in RFC 524D. Crocker, J. Postel | Unknown | July 1973 |
| 462 | Responding to user needsJ. Iseli, D. Crocker | Unknown | February 1973 |
| 352 | TIP Site Information FormD. Crocker | Unknown | June 1972 |
| 351 | Graphics information form for the ARPANET graphics resources notebookD. Crocker | Unknown | June 1972 |