[MS-OXSMTP]: Simple Mail Transfer Protocol (SMTP) Extensions https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c Specifies extensions to the Simple Mail Transfer Protocol (SMTP) standards to facilitate authentication negotiation between a client and a server and to enable the server to close connections that exceed configured thresholds. Major Update for [MS-OXSMTP] (Version 19.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 19.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP].pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-240416.docx">DOCX</a></li></ul> Tue, 16 Apr 2024 MS-OXSMTP-20240416 No Update for [MS-OXSMTP] (Version 18.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 18.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210817.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210817.docx">DOCX</a></li></ul> Tue, 17 Aug 2021 MS-OXSMTP-20210817 Major Update for [MS-OXSMTP] (Version 18.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 18.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210625.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210625.docx">DOCX</a></li></ul> Fri, 25 Jun 2021 MS-OXSMTP-20210625 Major Update for [MS-OXSMTP] (Version 17.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 17.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210422.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210422.docx">DOCX</a></li></ul> Thu, 22 Apr 2021 MS-OXSMTP-20210422 Major Update for [MS-OXSMTP] (Version 16.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 16.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210407.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-210407.docx">DOCX</a></li></ul> Wed, 07 Apr 2021 MS-OXSMTP-20210407 Major Update for [MS-OXSMTP] (Version 15.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 15.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-181001.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-181001.docx">DOCX</a></li></ul> Mon, 01 Oct 2018 MS-OXSMTP-20181001 Major Update for [MS-OXSMTP] (Version 14.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 14.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-180724.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-180724.docx">DOCX</a></li></ul> Tue, 24 Jul 2018 MS-OXSMTP-20180724 Major Update for [MS-OXSMTP] (Version 13.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 13.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-170316.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-170316.docx">DOCX</a></li></ul> Thu, 16 Mar 2017 MS-OXSMTP-20170316 No Update for [MS-OXSMTP] (Version 12.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 12.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-160914.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-160914.docx">DOCX</a></li></ul> Wed, 14 Sep 2016 MS-OXSMTP-20160914 Major Update for [MS-OXSMTP] (Version 12.0) https://docs.microsoft.com/en-us/openspecs/exchange_server_protocols/MS-OXSMTP/1056b1f9-1cad-4037-bf77-4023769ee85c <b>Protocol Revision:</b> 12.0<br/><b>Downloads:</b><br/><ul style="list-style-type: square;"><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-160613.pdf">PDF</a></li><li><a href="https://msopenspecs.azureedge.net/files/MS-OXSMTP/[MS-OXSMTP]-160613.docx">DOCX</a></li></ul> Mon, 13 Jun 2016 MS-OXSMTP-20160613