We use Postmark not only for our emails, but also to power Ply's built-in dynamic email capabilities. It's reliable, well documented and most of all - comes with awesome human support.
What's great
excellent documentation (1)reliable email delivery (5)human support (3)
We have an untraditional way of using Framer - we use it inside of our product. All of our static in-product is built on Framer and it's been key in moving fast. We're addicted.