Are these email services useful? #lean-startup-tests

Hey guys, my name is Arik and I was the head of growth of Guggy (YC S17) as well as founded a crowdfunding platform that still operates ($9M raised across 5K campaigns so far, self-funded). Guggy was recently shut down and I'm doing some tests on a few ideas I had. Currently, I'm testing these https://openedandreplied.squarespace.com and would love to get your feedback. Thanks!

Thanks!