| 9422 | The LIMITS SMTP Service ExtensionN. Freed, J. Klensin | Proposed Standard | February 2024 |
| 9078 | Reaction: Indicating Summary Reaction to a MessageD. Crocker, R. Signes, N. Freed | Experimental | August 2021 |
| 7103 | Advice for Safe Handling of Malformed MessagesM. Kucherawy, G. Shapiro, N. Freed | Informational | January 2014 |
| 6851 | Internet Message Access Protocol (IMAP) - MOVE ExtensionA. Gulbrandsen, N. Freed, Ed. | Proposed Standard | January 2013 |
| 6838 | Media Type Specifications and Registration ProceduresN. Freed, J. Klensin, T. Hansen | Best Current Practice | January 2013 |
| 6532 | Internationalized Email HeadersA. Yang, S. Steele, N. Freed | Proposed Standard | February 2012 |
| 6152 | SMTP Service Extension for 8-bit MIME TransportJ. Klensin, N. Freed, M. Rose, D. Crocker, Ed. | Internet Standard | March 2011 |
| 6009 | Sieve Email Filtering: Delivery Status Notifications and Deliver-By ExtensionsN. Freed | Proposed Standard | October 2010 |
| 5784 | Sieve Email Filtering: Sieves and Display Directives in XMLN. Freed, S. Vedam | Proposed Standard | March 2010 |
| 5463 | Sieve Email Filtering: Ihave ExtensionN. Freed | Proposed Standard | March 2009 |
| 5260 | Sieve Email Filtering: Date and Index ExtensionsN. Freed | Proposed Standard | July 2008 |
| 5230 | Sieve Email Filtering: Vacation ExtensionT. Showalter, N. Freed, Ed. | Proposed Standard | January 2008 |
| 5183 | Sieve Email Filtering: Environment ExtensionN. Freed | Proposed Standard | May 2008 |
| 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 |
| 2979 | Behavior of and Requirements for Internet FirewallsN. Freed | Informational | October 2000 |
| 2978 | IANA Charset Registration ProceduresN. Freed, J. Postel | Best Current Practice | October 2000 |
| 2964 | Use of HTTP State ManagementK. Moore, N. Freed | Best Current Practice | October 2000 |
| 2920 | SMTP Service Extension for Command PipeliningN. Freed | Internet Standard | September 2000 |
| 2789 | Mail Monitoring MIBN. Freed, S. Kille | Proposed Standard | March 2000 |
| 2788 | Network Services Monitoring MIBN. Freed, S. Kille | Proposed Standard | March 2000 |
| 2480 | Gateways and MIME Security MultipartsN. Freed | Proposed Standard | January 1999 |
| 2442 | The Batch SMTP Media TypeN. Freed, D. Newman, J. Belissent, M. Hoy | Informational | November 1998 |
| 2278 | IANA Charset Registration ProceduresN. Freed, J. Postel · obsoleted by RFC 2978 | Informational | January 1998 |
| 2249 | Mail Monitoring MIBN. Freed, S. Kille · obsoleted by RFC 2789 | Proposed Standard | January 1998 |
| 2248 | Network Services Monitoring MIBN. Freed, S. Kille · obsoleted by RFC 2788 | Proposed Standard | January 1998 |
| 2231 | MIME Parameter Value and Encoded Word Extensions: Character Sets, Languages, and ContinuationsN. Freed, K. Moore | Proposed Standard | November 1997 |
| 2197 | SMTP Service Extension for Command PipeliningN. Freed · obsoleted by RFC 2920 | Draft 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 |
| 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 |
| 2046 | Multipurpose Internet Mail Extensions (MIME) Part Two: Media TypesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2045 | Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message BodiesN. Freed, N. Borenstein | Draft Standard | November 1996 |
| 2034 | SMTP Service Extension for Returning Enhanced Error CodesN. Freed | Proposed Standard | October 1996 |
| 2017 | Definition of the URL MIME External-Body Access-TypeN. Freed, K. Moore, A. Cargille | Proposed Standard | October 1996 |
| 1870 | SMTP Service Extension for Message Size DeclarationJ. Klensin, N. Freed, K. Moore | Internet Standard | November 1995 |
| 1869 | SMTP Service ExtensionsJ. Klensin, N. Freed, M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 2821 | Internet Standard | November 1995 |
| 1854 | SMTP Service Extension for Command PipeliningN. Freed · obsoleted by RFC 2197 | Proposed Standard | October 1995 |
| 1848 | MIME Object Security ServicesS. Crocker, N. Freed, J. Galvin, S. Murphy | Historic | October 1995 |
| 1847 | Security Multiparts for MIME: Multipart/Signed and Multipart/EncryptedJ. Galvin, S. Murphy, S. Crocker, N. Freed | Proposed Standard | October 1995 |
| 1845 | SMTP Service Extension for Checkpoint/RestartD. Crocker, N. Freed, A. Cargille | Experimental | September 1995 |
| 1653 | SMTP Service Extension for Message Size DeclarationJ. Klensin, N. Freed, K. Moore · obsoleted by RFC 1870 | Draft Standard | July 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 |
| 1566 | Mail Monitoring MIBS. Kille, N. Freed · obsoleted by RFC 2249, RFC 2789 | Proposed Standard | January 1994 |
| 1565 | Network Services Monitoring MIBS. Kille, N. Freed · obsoleted by RFC 2248 | Proposed Standard | January 1994 |
| 1521 | MIME (Multipurpose Internet Mail Extensions) Part One: Mechanisms for Specifying and Describing the Format of Internet Message BodiesN. Borenstein, N. Freed · obsoleted by RFC 2045, RFC 2046, RFC 2047, RFC 2048, RFC 2049 | Draft Standard | September 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 |
| 1425 | SMTP Service ExtensionsJ. Klensin, N. Freed, Ed., M. Rose, E. Stefferud, D. Crocker · obsoleted by RFC 1651 | Proposed Standard | February 1993 |
| 1341 | MIME (Multipurpose Internet Mail Extensions): Mechanisms for Specifying and Describing the Format of Internet Message BodiesN. Borenstein, N. Freed · obsoleted by RFC 1521 | Proposed Standard | June 1992 |