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 (15 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
15/15
  • SFR (Desktop webmail)
14/15
  • Samsung Email (Android)
13/15
  • Apple Mail (iOS)
  • LaPoste.net (Desktop webmail)
  • GMX (iOS)
  • WEB.DE (iOS)
12/15
  • Outlook (Android)
  • Apple Mail (MacOS)
10/15
  • ProtonMail (Android)
  • 1&1 (Desktop webmail)
9/15
  • Outlook (MacOS)
  • Outlook (iOS)
  • SFR (iOS)
  • SFR (Android)
  • Fastmail (Desktop webmail)
8/15
  • Outlook (outlook.com)
7/15
  • Mozilla Thunderbird (MacOS)
  • ProtonMail (Desktop webmail)
  • ProtonMail (iOS)
6/15
  • Gmail (Desktop webmail)
  • Orange (Android)
  • Mail.ru (Desktop webmail)
5/15
  • Gmail (iOS)
  • Gmail (Android)
  • Gmail (Mobile webmail)
  • Orange (Desktop webmail)
4/15
  • Outlook (Windows)
  • AOL (Android)
  • Orange (iOS)
  • HEY (Desktop webmail)
  • GMX (Android)
  • WEB.DE (Android)
  • 1&1 (Android)
3/15
  • Yahoo! Mail (Desktop webmail)
  • Yahoo! Mail (iOS)
  • Yahoo! Mail (Android)
  • AOL (Desktop webmail)
2/15
  • GMX (Desktop webmail)
  • WEB.DE (Desktop webmail)
1/15
  • Outlook (Windows mail)
  • AOL (iOS)
  • Free.fr (Desktop webmail)
0/15
  • Mozilla Thunderbird (Windows)
  • T-online.de (Desktop webmail)

Performance (5 tested features)

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

Tested features

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

Internationalization (26 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
23/26
  • Apple Mail (MacOS)
22/26
  • GMX (iOS)
  • WEB.DE (iOS)
21/26
  • Mail.ru (Desktop webmail)
20/26
  • Samsung Email (Android)
19/26
  • Apple Mail (iOS)
17/26
  • GMX (Android)
  • WEB.DE (Android)
  • 1&1 (Desktop webmail)
  • 1&1 (Android)
15/26
  • SFR (Desktop webmail)
14/26
  • Mozilla Thunderbird (MacOS)
  • SFR (iOS)
12/26
  • SFR (Android)
  • ProtonMail (Desktop webmail)
  • ProtonMail (iOS)
  • LaPoste.net (Desktop webmail)
11/26
  • Outlook (MacOS)
  • Outlook (outlook.com)
  • Outlook (iOS)
  • Outlook (Android)
  • Fastmail (Desktop webmail)
10/26
  • ProtonMail (Android)
8/26
  • Gmail (Desktop webmail)
  • AOL (iOS)
7/26
  • Yahoo! Mail (Desktop webmail)
  • Yahoo! Mail (iOS)
  • AOL (Desktop webmail)
  • AOL (Android)
  • HEY (Desktop webmail)
6/26
  • Gmail (iOS)
  • Gmail (Android)
  • Yahoo! Mail (Android)
5/26
  • Gmail (Mobile webmail)
4/26
  • Orange (iOS)
3/26
  • Outlook (Windows)
  • Outlook (Windows mail)
  • Orange (Android)
2/26
  • Orange (Desktop webmail)
  • GMX (Desktop webmail)
  • WEB.DE (Desktop webmail)
0/26
  • Mozilla Thunderbird (Windows)
  • T-online.de (Desktop webmail)
  • Free.fr (Desktop webmail)

Features per email client

Gmail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility6(view)09(view)015
Internationalization8(view)018(view)026
Performance02(view)3(view)05

Gmail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)010(view)015
Internationalization6(view)2(view)18(view)026
Performance02(view)3(view)05

Gmail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)1(view)9(view)015
Internationalization6(view)4(view)16(view)026
Performance02(view)3(view)05

Gmail (Mobile webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)010(view)015
Internationalization5(view)2(view)19(view)026
Performance02(view)3(view)05

Outlook (Windows)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)1(view)10(view)015
Internationalization3(view)1(view)22(view)026
Performance005(view)05

Outlook (Windows mail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility1(view)014(view)015
Internationalization3(view)1(view)22(view)026
Performance1(view)04(view)05

Outlook (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)3(view)3(view)015
Internationalization11(view)015(view)026
Performance3(view)02(view)05

Outlook (outlook.com)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility8(view)3(view)4(view)015
Internationalization11(view)015(view)026
Performance3(view)02(view)05

Outlook (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)06(view)015
Internationalization11(view)1(view)14(view)026
Performance3(view)02(view)05

Outlook (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility12(view)03(view)015
Internationalization11(view)015(view)026
Performance3(view)02(view)05

Yahoo! Mail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility3(view)2(view)10(view)015
Internationalization7(view)1(view)18(view)026
Performance2(view)03(view)05

Yahoo! Mail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility3(view)2(view)10(view)015
Internationalization7(view)1(view)18(view)026
Performance2(view)03(view)05

Yahoo! Mail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility3(view)2(view)10(view)015
Internationalization6(view)1(view)19(view)026
Performance2(view)03(view)05

Apple Mail (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility12(view)1(view)2(view)015
Internationalization23(view)2(view)1(view)026
Performance4(view)1(view)005

Apple Mail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)02(view)015
Internationalization19(view)1(view)6(view)026
Performance5(view)0005

AOL (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility3(view)2(view)10(view)015
Internationalization7(view)1(view)18(view)026
Performance2(view)03(view)05

AOL (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility1(view)1(view)12(view)1(view)15
Internationalization8(view)018(view)026
Performance2(view)03(view)05

AOL (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)1(view)9(view)1(view)15
Internationalization7(view)019(view)026
Performance2(view)03(view)05

Mozilla Thunderbird (MacOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)07(view)1(view)15
Internationalization14(view)0012(view)26
Performance4(view)01(view)05

Mozilla Thunderbird (Windows)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility00015(view)15
Internationalization00026(view)26
Performance1(view)004(view)5

Samsung Email (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility14(view)01(view)015
Internationalization20(view)1(view)5(view)026
Performance5(view)0005

SFR (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility15(view)00015
Internationalization15(view)0011(view)26
Performance5(view)0005

SFR (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)06(view)015
Internationalization14(view)0012(view)26
Performance3(view)02(view)05

SFR (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)06(view)015
Internationalization12(view)01(view)13(view)26
Performance4(view)01(view)05

Orange (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility5(view)08(view)2(view)15
Internationalization2(view)1(view)9(view)14(view)26
Performance3(view)02(view)05

Orange (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)09(view)2(view)15
Internationalization4(view)1(view)7(view)14(view)26
Performance2(view)03(view)05

Orange (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility6(view)07(view)2(view)15
Internationalization3(view)1(view)6(view)16(view)26
Performance3(view)02(view)05

ProtonMail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)06(view)2(view)15
Internationalization12(view)0014(view)26
Performance2(view)03(view)05

ProtonMail (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility7(view)06(view)2(view)15
Internationalization12(view)0014(view)26
Performance2(view)03(view)05

ProtonMail (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility10(view)03(view)2(view)15
Internationalization10(view)0016(view)26
Performance2(view)03(view)05

HEY (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)09(view)2(view)15
Internationalization7(view)05(view)14(view)26
Performance3(view)02(view)05

Mail.ru (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility6(view)1(view)8(view)015
Internationalization21(view)05(view)026
Performance1(view)04(view)05

Fastmail (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility9(view)04(view)2(view)15
Internationalization11(view)01(view)14(view)26
Performance1(view)04(view)05

LaPoste.net (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)002(view)15
Internationalization12(view)0014(view)26
Performance5(view)0005

T-online.de (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility001(view)14(view)15
Internationalization00026(view)26
Performance0005(view)5

Free.fr (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility1(view)0014(view)15
Internationalization00026(view)26
Performance0005(view)5

GMX (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility2(view)012(view)1(view)15
Internationalization2(view)023(view)1(view)26
Performance1(view)04(view)05

GMX (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)002(view)15
Internationalization22(view)004(view)26
Performance4(view)01(view)05

GMX (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)09(view)2(view)15
Internationalization17(view)05(view)4(view)26
Performance2(view)03(view)05

WEB.DE (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility2(view)012(view)1(view)15
Internationalization2(view)023(view)1(view)26
Performance1(view)04(view)05

WEB.DE (iOS)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility13(view)002(view)15
Internationalization22(view)004(view)26
Performance4(view)01(view)05

WEB.DE (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)09(view)2(view)15
Internationalization17(view)05(view)4(view)26
Performance2(view)03(view)05

1&1 (Desktop webmail)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility10(view)03(view)2(view)15
Internationalization17(view)05(view)4(view)26
Performance2(view)03(view)05

1&1 (Android)

CategorySupportedPartialUnsupportedUntestedTotal
Accessibility4(view)09(view)2(view)15
Internationalization17(view)05(view)4(view)26
Performance2(view)03(view)05