Alt Tags; Retina Images in Email We all know that emails are the “workhorse channel.” But are you working everything available to you to optimize your open and click-through rates? In this Part 1 of a special 2-part series of newsletters I address frequent mistakes and ways to avoid them.

Spam Filters & PreheadersI learn a lot from my email work with clients. In Part 2 of my series on mistakes to avoid, I want to alert you to Mistake 3 and Mistake 4, which — when it comes to lifting open rates — you should never, ever ignore!

What’s a responsive email? How does the same newsletter look on the desktop and on a mobile device? How does improper formatting affect the click-through rate? Get answers here.