writing-mode
Sets whether lines of text are laid out horizontally or vertically.
Outlook
Windows
2007
2010
2013
2016
2019
Windows Mail
2022-05
macOS
16.62
16.80
Outlook.com
2022-05
2024-01
iOS
2022-05
Android
2022-05
Samsung Email
Android
6.0
Mozilla Thunderbird
macOS
91.5.0
Fastmail
Desktop Webmail
2022-05
HEY
Desktop Webmail
2022-05
LaPoste.net
Desktop Webmail
2022-05
1&1
Desktop Webmail
2022-09
Android
2022-09
Mail.ru
Desktop Webmail
2022-05
WP.pl
Desktop Webmail
2024-04