| 9394 | IMAP PARTIAL Extension for Paged SEARCH and FETCHA. Melnikov, A. P. Achuthan, V. Nagulakonda, L. Alves | Proposed Standard | June 2023 |
| 9051 | Internet Message Access Protocol (IMAP) - Version 4rev2A. Melnikov, Ed., B. Leiba, Ed. | Proposed Standard | August 2021 |
| 8508 | IMAP REPLACE ExtensionS. Brandt | Proposed Standard | January 2019 |
| 8474 | IMAP Extension for Object IdentifiersB. Gondwana, Ed. | Proposed Standard | September 2018 |
| 8438 | IMAP Extension for STATUS=SIZES. Bosch | Proposed Standard | August 2018 |
| 7889 | The IMAP APPENDLIMIT ExtensionJ. SrimushnamBoovaraghamoorthy, N. Bisht | Proposed Standard | May 2016 |
| 7888 | IMAP4 Non-synchronizing LiteralsA. Melnikov, Ed. | Proposed Standard | May 2016 |
| 7377 | IMAP4 Multimailbox SEARCH ExtensionB. Leiba, A. Melnikov | Proposed Standard | October 2014 |
| 7162 | IMAP Extensions: Quick Flag Changes Resynchronization (CONDSTORE) and Quick Mailbox Resynchronization (QRESYNC)A. Melnikov, D. Cridland | Proposed Standard | May 2014 |
| 6855 | IMAP Support for UTF-8P. Resnick, Ed., C. Newman, Ed., S. Shen, Ed. · obsoleted by RFC 9755 | Proposed Standard | March 2013 |
| 6237 | IMAP4 Multimailbox SEARCH ExtensionB. Leiba, A. Melnikov · obsoleted by RFC 7377 | Experimental | May 2011 |
| 6203 | IMAP4 Extension for Fuzzy SearchT. Sirainen | Proposed Standard | March 2011 |
| 6154 | IMAP LIST Extension for Special-Use MailboxesB. Leiba, J. Nicolson | Proposed Standard | March 2011 |
| 5738 | IMAP Support for UTF-8P. Resnick, C. Newman · obsoleted by RFC 6855 | Experimental | March 2010 |
| 5466 | IMAP4 Extension for Named Searches (Filters)A. Melnikov, C. King | Proposed Standard | February 2009 |
| 5465 | The IMAP NOTIFY ExtensionA. Gulbrandsen, C. King, A. Melnikov | Proposed Standard | February 2009 |
| 5464 | The IMAP METADATA ExtensionC. Daboo | Proposed Standard | February 2009 |
| 5267 | Contexts for IMAP4D. Cridland, C. King | Proposed Standard | July 2008 |
| 5259 | Internet Message Access Protocol - CONVERT ExtensionA. Melnikov, Ed., P. Coates, Ed. | Proposed Standard | July 2008 |
| 5257 | Internet Message Access Protocol - ANNOTATE ExtensionC. Daboo, R. Gellens | Experimental | June 2008 |
| 5255 | Internet Message Access Protocol InternationalizationC. Newman, A. Gulbrandsen, A. Melnikov | Proposed Standard | June 2008 |
| 5182 | IMAP Extension for Referencing the Last SEARCH ResultA. Melnikov | Proposed Standard | March 2008 |
| 5162 | IMAP4 Extensions for Quick Mailbox ResynchronizationA. Melnikov, D. Cridland, C. Wilson · obsoleted by RFC 7162 | Proposed Standard | March 2008 |
| 5092 | IMAP URL SchemeA. Melnikov, Ed., C. Newman | Proposed Standard | November 2007 |
| 4731 | IMAP4 Extension to SEARCH Command for Controlling What Kind of Information Is ReturnedA. Melnikov, D. Cridland | Proposed Standard | November 2006 |
| 4551 | IMAP Extension for Conditional STORE Operation or Quick Flag Changes ResynchronizationA. Melnikov, S. Hole · obsoleted by RFC 7162 | Proposed Standard | June 2006 |
| 4469 | Internet Message Access Protocol (IMAP) CATENATE ExtensionP. Resnick | Proposed Standard | April 2006 |