左，右，上，下
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
Samsung Email
Android
6.0
Mozilla Thunderbird
macOS
78.10
LaPoste.net
桌面网页版
2021-08
WP.pl
桌面网页版
2024-05