Css guide Email clients

Desktop See all 11

AOL Desktop Apple Mail 10 IBM Notes 9 Outlook 2000–03 Outlook 2007–16 Outlook Express Outlook for Mac Postbox
Thunderbird Windows 10 Mail Windows Live Mail

Mobile See all 16

Android 4.2.2 Mail Android 4.4.4 Mail AOL Alto Android app AOL Alto iOS app BlackBerry Gmail Android app Gmail Android app IMAP Gmail iOS app
Gmail mobile webmail iOS 10 Mail iOS 11 Mail Outlook Android app Outlook iOS app Windows Phone 8 Mail Yahoo! Mail Android app Yahoo! Mail iOS app

Webmail

AOL Mail G Suite Gmail Outlook.com Yahoo! Mail

Webmail

Yahoo! Mail

Yahoo!’s free webmail service, which can be accessed through a web browser.

Tested in Chrome on macOS.

Link Element
<link> in <head>
<link> in <body>
Selectors
E ~ F
E:not(s)
E[foo]
E[foo~="bar"]
E[foo^="bar"]
E[foo$="bar"]
E[foo*="bar"]
E:nth-child(n)
E:nth-last-child(n)
E:nth-of-type(n)
E:nth-last-of-type(n)
E::before
E::after
E:link
E:target
Media Queries
and
or (comma)
not
any-hover
any-pointer
hover
max-aspect-ratio
max-device-aspect-ratio
max-device-height
max-device-pixel-ratio
max-device-width
max-resolution
min-aspect-ratio
min-device-aspect-ratio
min-device-height
min-device-pixel-ratio
min-device-width
min-resolution
orientation
pointer
Text & Fonts
@font-face
EOT
SVG
TTF
WOFF
WOFF2
WOFF base64 encoded
WOFF2 base64 encoded
font-feature-settings
font-kerning
font-stretch
font-synthesis
font-variant

Partial. Supports CSS2 values, but not CSS3.

hyphens
overflow-wrap
text-fill-color
text-overflow
text-shadow

Partial. Supports a single shadow per element, but not multiple.

text-size-adjust
text-stroke
text-stroke-color
text-stroke-width
Color & Background
background

Buggy. For slash syntax values, it removes the slash character, making the value invalid.

background-blend-mode
background-clip
background-origin
isolation
mix-blend-mode
CSS gradients
Data URI background image
Multiple background images
HSL Colors
HSLA Colors
RGBA Colors
Box Model
border-image
box-shadow
box-sizing
height

Buggy. Client changes the height property to min-height.

min-height

Supported, but because the client changes height to min-height, that value will override this one if it comes after.

Positioning & Display
bottom
cursor

Partial. Supports most CSS2 values.

left
object-fit
object-position
opacity
position

Supports the value relative, but not the properties top, right, bottom, or left.

resize
right
top
Animations
animation
animation-delay
animation-direction
animation-duration
animation-fill-mode
animation-iteration-count
animation-name
animation-play-state
animation-timing-function
Transforms
backface-visibility
perspective
perspective-origin
transform
transform-origin
transform-style
Transitions
transition
transition-delay
transition-duration
transition-property
transition-timing-function
Filters
backdrop-filter
filter
Columns
break-after
break-before
break-inside
column-count
column-fill
column-gap
column-rule
column-rule-color
column-rule-style
column-rule-width
column-span
column-width
columns
Flexbox
Flexbox: align-content
Flexbox: align-items
align-self
Flexbox: display
flex
flex-basis
flex-direction
flex-flow
flex-grow
flex-shrink
flex-wrap
justify-content
order
Grid
align-content
align-items
align-self
display
grid
grid-area
grid-auto-columns
grid-auto-flow
grid-auto-rows
grid-column
grid-column-end
grid-column-gap
grid-column-start
grid-gap
grid-row
grid-row-end
grid-row-gap
grid-row-start
grid-template-areas
grid-template-columns
grid-template-rows
justify-content
justify-items
justify-self

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