April 4, 2019

How to Code HTML Email Newsletters

Coding an HTML email is a fun, practical problem for programmers to solve. Unlike coding a web page, HTML emails need to display well on old email software — think Outlook or Mac Mail, as well as adapt to phone and tablet screens. Below you can find information on how to create HTML emails that display well on any device, plus ideas to adapt your current HTML email code to display on phones and tablets.

Take a look at our analysis of CSS properties for 12 of the most popular email applications.

CSS properties / email clientsApple MailAndroid 4.3 (Native)Outlook ’07 / ’10 / ’13Outlook 2011iPhone / iPad (Native)iPhone / iPad (Gmail)Windows Live Mail 2012AOLGmailOffice 365Outlook.comYahoo! Mail
preheader

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Background (color and images): background – body
background-image

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background-repeat

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background-position

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background-size (px)

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background-size (%)

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background-size: cover

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background-size: contain

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Background (color and images): background – table
background-color

background-image

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background-repeat

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background-position

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background-size (px)

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background-size (%)

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background-size: cover

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background-size: contain

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Background – td
background-color

background-image

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background-repeat

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background-position

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background-size (px)

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background-size (%)

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background-size: cover

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background-size: contain

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display: block

display: inline

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display: inline-block

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display: none

Yes (txt)

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Style element
<style></style> tag in section <head>

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<style></style> tag in section <body>

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Link tag
<style></style> tag in section <head>

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<style></style> tag in section <body>

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Web fonts
external font -> link

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external font -> @import in head

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external font -> @import in body

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@Font-Face

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Selectors
e

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*

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e > f

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e:link

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e:active

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e:hover

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e:focus

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e+f

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e[foo]

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e.className

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e#id

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e:first-line

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e:first-letter

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Border properties
border

border-color

border-collapse

border-spacing

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border-style

border-width

Lists
list-style-position

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list-style-type

Fonts
font-family

font-size

font-style

font-variant

font-weight

Margin and padding
margin (works only with block elemements)

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padding

Text properties
color

direction

letter-spacing

line-height

text-align

text-decoration

text-indent

text-transform (uppercase)

word-spacing

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white-space

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Positioning
bottom

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clear

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clip

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float

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left

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position

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right

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top

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vertical-align

z-index

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Dimensions
height

width

min-height (works only with block elemements)

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Yes (block)

Yes (block)

min-width

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Other properties
cursor

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empty-cells

opacity

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outline

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overflow

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box resize

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visibility

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Gradients
gradient – email background

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gradient – button

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CSS 3 and HTML 5
<canvas>

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border-radius

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box-shadow

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box sizing (border-box;)

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multiple background Images

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transition

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multiple Columns

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<svg>

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text-shadow

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<video>

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Animation
Animated gif

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Responsive
RED

n/a

n/a

-

n/a

n/a

n/a

n/a

n/a

n/a

Media Queries

n/a

n/a

-

n/a

n/a

n/a

n/a

n/a

n/a

Colors
HEX

RGB

RGBa

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HSL

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HSLa

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