If mail goes to spam while using Postmark, it's almost ALWAYS related to the content. So we built this very simply tool to help you test the headers and contents of your emails to make sure that they're scoring as well as possible to go one step further in avoiding the spam folder!
We decided to offer it as a free API to make the world of email just a bit better. We also built a simple single-page scoring tool for anyone to use even if they're not API savvy.
Ideas and feedback are welcome!