Learn more about best practice with our downloadable fact sheet.
If you're looking to commission an email creative, point your designer or agency in the direction of this, our downloadable guide that'll help them create something that will get your message to inboxes, not junk mail.
If you're a designer or a coder—though hopefully you're both—then you'll definitely want to download and peruse these checklists of what to do, and perhaps more importantly, what not to do when it comes to HTML emails.