background

Estimated Support About

68.29% + 31.71% = 100.0%

Apple Mail

macOS

12.4

iOS

12.1

Gmail

Desktop Webmail

2019-02
2023-07
6 7
2023-08

iOS

2019-02

Android

2019-02

Mobile Webmail

2020-02

Outlook

Windows

2007
3
2010
3
2013
3
2016
3
2019
3

Windows Mail

2019-02
2021-10
3

macOS

2019-02
16.80

Outlook.com

2019-02

iOS

2019-02

Android

2019-02

Yahoo! Mail

Desktop Webmail

2019-02
1 2 4
2021-10
1 2

iOS

2019-02
1 2 4
2021-10
1 2

Android

2019-02
1 2 4
2021-10
1 2

AOL

Desktop Webmail

2019-02
1 2 4
2021-10
1 2

iOS

2019-02
1 2 4
2021-10
1 2

Android

2019-02
1 2 4
2021-10
1 2

Samsung Email

Android

5.0.10.2
6.0.04.6

Mozilla Thunderbird

macOS

60.5.0

ProtonMail

Desktop Webmail

2020-03

iOS

2020-03

Android

2020-03

Fastmail

Desktop Webmail

2021-07

HEY

Desktop Webmail

2020-06

Orange

Desktop Webmail

2019-08
2021-03
6

iOS

2019-08
2024-04
6

Android

2019-08
2024-04
6

LaPoste.net

Desktop Webmail

2021-08

SFR

Desktop Webmail

2019-08

iOS

2019-08

Android

2019-08

GMX

Desktop Webmail

2022-06
1 5 6

iOS

2022-06

Android

2022-06

1&1

Desktop Webmail

2022-06

Android

2022-06

Mail.ru

Desktop Webmail

2020-10
5

WEB.DE

Desktop Webmail

2022-06
1 5 6

iOS

2022-06

Android

2022-06

WP.pl

Desktop Webmail

2025-04

Notes

  • 1

    Partial. Does not support multiple values. The comma between two values is removed.

  • 2

    Partial. Does not support the / value shorthand for background-size. But it can be used in the background-size property instead.

  • 3

    Partial. Only background-color values are supported.

  • 4

    Partial. Images URL must be between quotes.

  • 5

    Partial. Does not support multiple values. The entire property is removed if so.

  • 6

    Partial. Does not support the / value shorthand for background-size.

  • 7

    Partial and buggy. Removes the entire style attribute or <style> tag when a url() function with a valid image URL is present. See Gmail rolling out changes that strip CSS with background images and Gmail and background images.

Know something we don't?

Is any of the above data outdated? Or do you want to add a new email client to the list? Heads on to GitHub and edit the data file!

Edit this page on GitHub Report an issue on GitHub

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Test it yourself

This feature was last tested on July 24, 2023.

If you want to test this feature in the same conditions as we did, you can get our test code and run a test by yourself. Make sure to follow our testing recommendations first.

View the test code