<form> element
The ability to submit an HTML form via email, this requires support of at least one form element, at least one form method and either input submit or button submit to pass data to an end point.
Outlook
Windows
2003
2007
2010
2013
2016
2019
Windows Mail
2020-01
macOS
2011
2016
2019
iOS
2019-06
Android
2019-06
Samsung Email
Android
6.0
9.0
Mozilla Thunderbird
macOS
68.4
Fastmail
Desktop Webmail
2021-07
HEY
Desktop Webmail
2020-06
LaPoste.net
Desktop Webmail
2021-08
1&1
Desktop Webmail
2022-11
Android
2022-11
Mail.ru
Desktop Webmail
2020-10