Email Client Feature Support Rankings

Email Client Feature Support Rankings

Last modified:

Can I Email? breaks down email features by the clients that support them. These features come with intrinsic value, which can be broken up into three buckets. Accessibility, performance, and internationalization (i18n).

This page lists the number of features supported in each category by each email client.

Email client ranks by category

The below outlines the three categories of accessibility, performance, and internationalization with the respective email clients that support them.

Accessibility (20 tested features)

These features are key to enabling assistive technology such as screen readers to be able to ingest email content. Email clients that support a majority of these features give email creators all opportunities to create accessible emails for their subscribers.

Tested features

Number of features Email Clients
20/20
  • SFR (Desktop webmail)
19/20
  • Samsung Email (Android)
18/20
  • Apple Mail (iOS)
17/20
  • Outlook (Android)
  • Apple Mail (MacOS)
  • LaPoste.net (Desktop webmail)
14/20
  • Outlook (MacOS)
  • Outlook (iOS)
  • SFR (iOS)
  • GMX (iOS)
  • WEB.DE (iOS)
13/20
  • Outlook (outlook.com)
  • Fastmail (Desktop webmail)
12/20
  • SFR (Android)
  • ProtonMail (Android)
11/20
  • Gmail (Desktop webmail)
  • Mozilla Thunderbird (MacOS)
  • ProtonMail (Desktop webmail)
  • ProtonMail (iOS)
  • 1&1 (Desktop webmail)
10/20
  • Gmail (iOS)
  • Gmail (Android)
  • Mail.ru (Desktop webmail)
9/20
  • Gmail (Mobile webmail)
8/20
  • AOL (Android)
7/20
  • Outlook (Windows)
  • Yahoo! Mail (Desktop webmail)
  • Yahoo! Mail (iOS)
  • Yahoo! Mail (Android)
  • AOL (Desktop webmail)
  • HEY (Desktop webmail)
6/20
  • Orange (Desktop webmail)
  • Orange (Android)
5/20
  • AOL (iOS)
  • Orange (iOS)
  • GMX (Android)
  • WEB.DE (Android)
  • 1&1 (Android)
4/20
  • Outlook (Windows mail)
  • Free.fr (Desktop webmail)
  • GMX (Desktop webmail)
3/20
  • WEB.DE (Desktop webmail)
2/20
  • T-online.de (Desktop webmail)
0/20
  • Mozilla Thunderbird (Windows)

Performance (6 tested features)

These features are key to the success of email rendering and loading.

Tested features

Number of features Email Clients
6/6
  • Apple Mail (iOS)
  • Samsung Email (Android)
  • SFR (Desktop webmail)
  • LaPoste.net (Desktop webmail)
5/6
  • Apple Mail (MacOS)
4/6
  • Outlook (MacOS)
  • Outlook (outlook.com)
  • Outlook (iOS)
  • Outlook (Android)
  • Mozilla Thunderbird (MacOS)
  • SFR (iOS)
  • SFR (Android)
  • Orange (Desktop webmail)
  • HEY (Desktop webmail)
  • GMX (iOS)
  • WEB.DE (iOS)
3/6
  • Yahoo! Mail (Desktop webmail)
  • Yahoo! Mail (iOS)
  • Yahoo! Mail (Android)
  • AOL (Desktop webmail)
  • AOL (iOS)
  • AOL (Android)
  • Orange (iOS)
  • Orange (Android)
  • ProtonMail (Desktop webmail)
  • ProtonMail (iOS)
2/6
  • Outlook (Windows mail)
  • ProtonMail (Android)
  • Mail.ru (Desktop webmail)
  • Fastmail (Desktop webmail)
  • GMX (Android)
  • WEB.DE (Android)
  • 1&1 (Desktop webmail)
  • 1&1 (Android)
1/6
  • Gmail (Desktop webmail)
  • Gmail (iOS)
  • Gmail (Android)
  • Gmail (Mobile webmail)
  • Outlook (Windows)
  • Mozilla Thunderbird (Windows)
  • Free.fr (Desktop webmail)
  • GMX (Desktop webmail)
  • WEB.DE (Desktop webmail)
0/6
  • T-online.de (Desktop webmail)

Internationalization (33 tested features)

Certain aspects of HTML and CSS are limited in their ability to translate across many languages. This category of features outlines those that are beneficial to internationalization (I18n) which would allow for developers the freedom to create semantic HTML in languages aside from English.

Tested features

Number of features Email Clients
29/33
  • Apple Mail (MacOS)
27/33
  • Mail.ru (Desktop webmail)
26/33
  • Apple Mail (iOS)
25/33
  • Samsung Email (Android)
22/33
  • GMX (iOS)
  • WEB.DE (iOS)
17/33
  • Mozilla Thunderbird (MacOS)
  • SFR (Desktop webmail)
  • GMX (Android)
  • WEB.DE (Android)
  • 1&1 (Desktop webmail)
  • 1&1 (Android)
16/33
  • SFR (iOS)
14/33
  • Outlook (iOS)
  • SFR (Android)
13/33
  • ProtonMail (Desktop webmail)
  • ProtonMail (iOS)
  • LaPoste.net (Desktop webmail)
12/33
  • Outlook (MacOS)
  • Outlook (outlook.com)
  • Outlook (Android)
  • Fastmail (Desktop webmail)
11/33
  • ProtonMail (Android)
9/33
  • Gmail (Desktop webmail)
8/33
  • AOL (iOS)
  • HEY (Desktop webmail)
7/33
  • Gmail (iOS)
  • Gmail (Android)
  • Yahoo! Mail (Desktop webmail)
  • Yahoo! Mail (iOS)
  • AOL (Desktop webmail)
  • AOL (Android)
6/33
  • Gmail (Mobile webmail)
  • Yahoo! Mail (Android)
5/33
  • Orange (iOS)
4/33
  • Orange (Android)
3/33
  • Outlook (Windows)
  • Outlook (Windows mail)
  • Orange (Desktop webmail)
2/33
  • GMX (Desktop webmail)
  • WEB.DE (Desktop webmail)
0/33
  • Mozilla Thunderbird (Windows)
  • T-online.de (Desktop webmail)
  • Free.fr (Desktop webmail)

Features per email client

Gmail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility11(view)09(view)020
Internationalization9(view)024(view)033
Performance1(view)2(view)3(view)06

Gmail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility10(view)010(view)020
Internationalization7(view)2(view)24(view)033
Performance1(view)2(view)3(view)06

Gmail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility10(view)1(view)9(view)020
Internationalization7(view)4(view)22(view)033
Performance1(view)2(view)3(view)06

Gmail (Mobile webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)1(view)10(view)020
Internationalization6(view)2(view)24(view)1(view)33
Performance1(view)2(view)3(view)06

Outlook (Windows)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)2(view)11(view)020
Internationalization3(view)1(view)29(view)033
Performance1(view)05(view)06

Outlook (Windows mail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)1(view)15(view)020
Internationalization3(view)1(view)29(view)033
Performance2(view)04(view)06

Outlook (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)3(view)3(view)020
Internationalization12(view)021(view)033
Performance4(view)02(view)06

Outlook (outlook.com)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)3(view)4(view)020
Internationalization12(view)021(view)033
Performance4(view)02(view)06

Outlook (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)06(view)020
Internationalization14(view)1(view)18(view)033
Performance4(view)02(view)06

Outlook (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility17(view)03(view)020
Internationalization12(view)021(view)033
Performance4(view)02(view)06

Yahoo! Mail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)2(view)11(view)020
Internationalization7(view)1(view)25(view)033
Performance3(view)03(view)06

Yahoo! Mail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)2(view)11(view)020
Internationalization7(view)1(view)25(view)033
Performance3(view)03(view)06

Yahoo! Mail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)2(view)11(view)020
Internationalization6(view)1(view)26(view)033
Performance3(view)03(view)06

Apple Mail (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility17(view)1(view)2(view)020
Internationalization29(view)2(view)2(view)033
Performance5(view)1(view)006

Apple Mail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility18(view)02(view)020
Internationalization26(view)1(view)6(view)033
Performance6(view)0006

AOL (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)2(view)11(view)020
Internationalization7(view)1(view)25(view)033
Performance3(view)03(view)06

AOL (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)1(view)13(view)1(view)20
Internationalization8(view)023(view)2(view)33
Performance3(view)03(view)06

AOL (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility8(view)1(view)10(view)1(view)20
Internationalization7(view)024(view)2(view)33
Performance3(view)03(view)06

Mozilla Thunderbird (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility11(view)07(view)2(view)20
Internationalization17(view)0016(view)33
Performance4(view)01(view)1(view)6

Mozilla Thunderbird (Windows)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility00020(view)20
Internationalization00033(view)33
Performance1(view)005(view)6

Samsung Email (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility19(view)01(view)020
Internationalization25(view)1(view)7(view)033
Performance6(view)0006

SFR (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility20(view)00020
Internationalization17(view)0016(view)33
Performance6(view)0006

SFR (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)06(view)020
Internationalization16(view)0017(view)33
Performance4(view)02(view)06

SFR (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility12(view)06(view)2(view)20
Internationalization14(view)01(view)18(view)33
Performance4(view)01(view)1(view)6

Orange (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility6(view)1(view)10(view)3(view)20
Internationalization3(view)1(view)9(view)20(view)33
Performance4(view)02(view)06

Orange (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)1(view)11(view)3(view)20
Internationalization5(view)1(view)7(view)20(view)33
Performance3(view)03(view)06

Orange (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility6(view)1(view)8(view)5(view)20
Internationalization4(view)1(view)6(view)22(view)33
Performance3(view)02(view)1(view)6

ProtonMail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility11(view)06(view)3(view)20
Internationalization13(view)0020(view)33
Performance3(view)03(view)06

ProtonMail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility11(view)06(view)3(view)20
Internationalization13(view)0020(view)33
Performance3(view)03(view)06

ProtonMail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility12(view)03(view)5(view)20
Internationalization11(view)0022(view)33
Performance2(view)03(view)1(view)6

HEY (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)010(view)3(view)20
Internationalization8(view)05(view)20(view)33
Performance4(view)02(view)06

Mail.ru (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility10(view)1(view)9(view)020
Internationalization27(view)06(view)033
Performance2(view)04(view)06

Fastmail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)04(view)3(view)20
Internationalization12(view)01(view)20(view)33
Performance2(view)04(view)06

LaPoste.net (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility17(view)003(view)20
Internationalization13(view)0020(view)33
Performance6(view)0006

T-online.de (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility2(view)01(view)17(view)20
Internationalization00033(view)33
Performance0006(view)6

Free.fr (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)0016(view)20
Internationalization00033(view)33
Performance1(view)005(view)6

GMX (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)013(view)3(view)20
Internationalization2(view)027(view)4(view)33
Performance1(view)04(view)1(view)6

GMX (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)006(view)20
Internationalization22(view)0011(view)33
Performance4(view)01(view)1(view)6

GMX (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)09(view)6(view)20
Internationalization17(view)05(view)11(view)33
Performance2(view)03(view)1(view)6

WEB.DE (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility3(view)013(view)4(view)20
Internationalization2(view)027(view)4(view)33
Performance1(view)04(view)1(view)6

WEB.DE (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)006(view)20
Internationalization22(view)0011(view)33
Performance4(view)01(view)1(view)6

WEB.DE (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)09(view)6(view)20
Internationalization17(view)05(view)11(view)33
Performance2(view)03(view)1(view)6

1&1 (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility11(view)03(view)6(view)20
Internationalization17(view)05(view)11(view)33
Performance2(view)03(view)1(view)6

1&1 (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)09(view)6(view)20
Internationalization17(view)05(view)11(view)33
Performance2(view)03(view)1(view)6