“You can’t use HTML5 or CSS3 in email.” Due to their “limited” support, the idea that using HTML5 and CSS3 in email is “impossible” remains a commonly-held notion throughout the email design industry. However, we’re calling it a complete myth.

Just because there can be issues with CSS in HTML emails doesn’t mean you should abandon efforts to use it. It all comes down to determining which codes are absolutely needed and how to style them so they can be rendered by email platforms.