While working on HackerIntro, I deal a lot with emails. Being somewhat of a perfectionist, I am obsessed with getting emails to look better and more consistent across email clients and platforms.
I've used services provided by incumbents (like Email on Acid), but I am never satisfied with their functionality, vision of the product, and price.
So, I've kept building my own preview/analysis solution, and it can reach a point soon where I can share it with others.
My question to you: do you test your emails in different clients, and if you pay for that, are you getting enough value for your money with whatever you're using?
(Any additional details will earn extra gratitude from me :)