left, right, top, bottom
Outlook
Windows
2007
2010
2013
2016
2019
Windows Mail
2021-05
macOS
2011
2016
16.80
Outlook.com
2021-05
2023-12
iOS
2021-05
Android
2021-05
Mozilla Thunderbird
macOS
78.10
Fastmail
Desktop Webmail
2021-07
HEY
Desktop Webmail
2021-05
LaPoste.net
Desktop Webmail
2021-08
1&1
Desktop Webmail
2022-06
Android
2022-06
Mail.ru
Desktop Webmail
2021-05
WP.pl
Desktop Webmail
2025-06