Have you ever coded HTML email templates?

Sendgrid

For coding HTML templates: 1. The website reallygoodemails.com was pretty helpful, it gives you a huge database of samples from brands and the code as well! So it's actually a great starting point. 2. BEE Free and Stripo are good drag and drop builders 3. Putsmail - Check this out to help you test emails, like Litmus but free. Hope this helps!