Designing HTML emails is just like designing a webpage. You go planning your page’s width and length of content and consider its appearance in your target browsers. Only that one of the browsers to consider is IE6! This is just an analogy to the fact that not all email clients have wide support for HTML and CSS.
Popular email clients include: Microsoft Outlook, Gmail, Yahoo! Mail, Hotmail, and email clients used by specific platforms like iPhone, iPad, and Android. All of these top clients should be considered for the simple fact that it just might be the one your recipients are using. You wouldn’t want to send a “broken” email, would you?
Here are two important things to remember in designing your HTML emails.