HTML email is the use of a subset of HTML and CSS to format an email message like a web page using colors, graphics, table columns and links.
When you send an email it’s important to send both plain text and HTML. You do this by sending your email as multi-part MIME. Most email service providers have tools to automatically construct the MIME for you. Some will generate a plain text version based on your HTML version, and there are third party tools as well.
Example of a text-only email:
# EMAIL TITLE GOES HERE
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi commodo elit sed quam auctor, ut facilisis odio aliquam. In hac habitasse platea dictumst.
Learn more: http://www.website.com/landing-page-1
---
## Subheader goes here
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Morbi commodo elit sed quam auctor, ut facilisis odio aliquam. In hac habitasse platea dictumst.
Learn more: http://www.website.com/landing-page-2
---
Footer and Sender information
Unsubscribe here: http://www.website.com/unsubscribe
Note that with the recent launch of Apple Watch, a new MIME part has surfaced: text/watch-html
. This content will only be displayed in the Apple Watch (and any other clients that support this MIME type).