Many of us may subscribe to some newsletters to get update about their site or information about a topic such as JavaScript Weekly, we may receive an email every week or every month to know what's happening there.The email we receive is just a simple HTML page but with an Email format called HTML Email. It seems it's simple to write this kind of HTML Email. But the thing is it's not so easy. It takes much effort by just designing an Email template.Whether the HTML Email can be displayed normally depends completely on the mail client. Most mail clients such as Outlook and Gmail will filter the ...