It's Harder. Plus It's a More Interesting Coding Challenge.
Real life email newsletters you can download to inspect and study "How did they do that?".
Some of the best online articles to show different ways to code HTML email newsletters.
Courses from Lynda.com and YouTube to help improve your HTML email coding techniques.
Find out which HTML and CSS elements work in which email client software.
Find out if your email code displays well in different client software. Then tweak code to perfection.
Use a canned email newsletter template. Or use a template as a start point for your coding.