I plan to use Listnerds to help potential readers find my posts and your post was really helpful in laying out the 3 or 4 million different kinds of Mail haha jk, not millions!
I am here from ListNerds ofc, and have read a few of your post before, so it already has helped me find fun people to learn from:)
Glad it was helpful, I just try to write about where I was confused and what would have been helpful when I started using the platform :)