Email Client Support Scoreboard

This page ranks email clients based on their support among the 299 HTML and CSS features listed on Can I email.

(Because every test is done manually, some features might not have been tested on every email client.)

Apple Mail (macOS) : 279/299
Apple Mail (iOS) : 279/299
Samsung Email (Android) : 250/298
Mozilla Thunderbird (macOS) : 226/263
SFR (Desktop Webmail) : 226/259
WEB.DE (iOS) : 222/235
GMX (iOS) : 222/234
LaPoste.net (Desktop Webmail) : 205/238
Mail.ru (Desktop Webmail) : 202/299
Fastmail (Desktop Webmail) : 195/242
Outlook (iOS) : 186/299
1&1 (Desktop Webmail) : 186/233
ProtonMail (Android) : 182/236
Outlook (Android) : 178/298
1&1 (Android) : 178/233
HEY (Desktop Webmail) : 176/243
SFR (iOS) : 176/258
Outlook (macOS) : 174/299
WEB.DE (Android) : 173/233
GMX (Android) : 173/233
Outlook (Outlook.com) : 171/299
ProtonMail (Desktop Webmail) : 169/244
SFR (Android) : 169/252
ProtonMail (iOS) : 165/245
Gmail (Desktop Webmail) : 152/299
Yahoo! Mail (Desktop Webmail) : 134/299
AOL (Desktop Webmail) : 132/299
Yahoo! Mail (iOS) : 128/299
AOL (iOS) : 127/289
AOL (Android) : 124/286
Gmail (Mobile Webmail) : 121/291
Orange (iOS) : 121/242
Orange (Desktop Webmail) : 117/240
Orange (Android) : 117/234
Gmail (Android) : 114/299
Gmail (iOS) : 111/299
Yahoo! Mail (Android) : 110/298
GMX (Desktop Webmail) : 99/273
WEB.DE (Desktop Webmail) : 97/264
Outlook (Windows Mail) : 62/294
Outlook (Windows) : 59/299
Mozilla Thunderbird (Windows) : 31/34
Free.fr (Desktop Webmail) : 16/21
T-online.de (Desktop Webmail) : 15/23
WP.pl (Desktop Webmail) : 1/4
RainLoop (Desktop Webmail) : 0/1
LaPoste.net (iOS) : 0/1
LaPoste.net (Android) : 0/1