I have been working in marketing and design for a decade but my email marketing work has been devoid of any opportunities to code my own templates- we have usually used customized using the WSISG builders within the ESP. I know some HTML/CSS, and can customize existing templates in this way, but as html email is so unique in many ways, I wonder what courses are out there that would give me a nice introduction to coding my own e-mails from scratch. I see so many coding courses out there- but have yet to find something that speaks specifically to coding for e-mail. Any suggestions?