Can I add the Post cover to the email template?

I'm trying to finish the blog on my new site so I can launch it and I can't for the life of me figure out how to pull the cover image into the email template override I'm using.

Any idea how I can do this? I'm basically going to just run it 100% wide and auto height with no cropping, so I literally just need the url for the image pulled into the email. Can someone give me a bit of code that would do this?

thanks!