Editing Simple Mail Transfer Protocol (section)

====SMTPUTF8====
Supporting servers include:
* [[Postfix (software)|Postfix]] (version 3.0 and later)<ref>[http://www.postfix.org/SMTPUTF8_README.html "''Postfix SMTPUTF8 support is enabled by default''"] {{Webarchive|url=https://web.archive.org/web/20200807234345/http://www.postfix.org/SMTPUTF8_README.html |date=August 7, 2020 }}, February 8, 2015, postfix.org</ref>
* Momentum (versions 4.1<ref name="momentum">{{cite press release |title=Message Systems Introduces Latest Version Of Momentum With New API-Driven Capabilities |url=http://www.prnewswire.com/news-releases/message-systems-introduces-latest-version-of-momentum-with-new-api-driven-capabilities-277568381.html |access-date=September 17, 2020 |archive-date=September 15, 2020 |archive-url=https://web.archive.org/web/20200915234830/https://www.prnewswire.com/news-releases/message-systems-introduces-latest-version-of-momentum-with-new-api-driven-capabilities-277568381.html |url-status=live }}</ref> and 3.6.5, and later)
* [[Sendmail]] (experimental support in 8.17.1)
* [[Exim]] (experimental as of the 4.86 release, quite mature in 4.96)
* [[CommuniGate Pro]] as of version 6.2.2<ref>{{cite web |url=https://communigate.com/Communigatepro/History62.html#6.2.2 |title=Version 6.2 Revision History |website=CommuniGate.com |access-date=September 17, 2020 |archive-date=October 29, 2020 |archive-url=https://web.archive.org/web/20201029221905/https://www.communigate.com/Communigatepro/History62.html#6.2.2 |url-status=live }}</ref>
* [[Courier-MTA]] as of version 1.0<ref>{{cite mailing list |url=https://sourceforge.net/p/courier/mailman/message/36417878/ |title=New releases of Courier packages |date=18 September 2018 |mailing-list=courier-announce |author=Sam Varshavchik |access-date=September 17, 2020 |archive-date=August 17, 2021 |archive-url=https://web.archive.org/web/20210817181032/https://sourceforge.net/p/courier/mailman/message/36417878/ |url-status=live }}</ref>
* Halon as of version 4.0<ref>{{cite web |url=https://github.com/halon/changelog |title=Halon MTA changelog |website=GitHub |date=November 9, 2021 |author= |quote=v4.0: New SMTPUTF8 support |access-date=September 17, 2020 |archive-date=September 18, 2020 |archive-url=https://web.archive.org/web/20200918190844/https://github.com/halon/changelog |url-status=live }} Updated for new versions</ref>
* [[Microsoft Exchange Server]] as of protocol revision 14.0<ref>{{cite web |url=https://interoperability.blob.core.windows.net/files/MS-OXSMTP/%5bMS-OXSMTP%5d-180724.docx |date=24 July 2018 |title=MS-OXSMTP: Simple Mail Transfer Protocol (SMTP) Extensions |access-date=September 17, 2020 |archive-date=August 16, 2021 |archive-url=https://web.archive.org/web/20210816051106/https://interoperability.blob.core.windows.net/files/MS-OXSMTP/%5bMS-OXSMTP%5d-180724.docx |url-status=live }}</ref>
* [[Haraka (software)|Haraka]] and other servers.<ref>{{cite web |url=https://uasg.tech/wp-content/uploads/2019/02/UASG021D-EN-EAI-Readiness-in-TLDs.pdf |title=EAI Readiness in TLDs |date=12 February 2019 |access-date=September 17, 2020 |archive-date=January 24, 2021 |archive-url=https://web.archive.org/web/20210124205507/https://uasg.tech/wp-content/uploads/2019/02/UASG021D-EN-EAI-Readiness-in-TLDs.pdf |url-status=live }}</ref>
* [[Oracle Communications Messaging Server]] as of release 8.0.2.<ref>{{cite web |url=https://docs.oracle.com/communications/E72263_01/doc.802/e72267/msvrn.htm#BAJGIBHB |title=Communications Messaging Server Release Notes |date=October 2017 |website=oracle.com |access-date=September 17, 2020 |archive-date=November 24, 2020 |archive-url=https://web.archive.org/web/20201124100920/https://docs.oracle.com/communications/E72263_01/doc.802/e72267/msvrn.htm#BAJGIBHB |url-status=live }}</ref>