In other "trying to make a website is hard" news, dealing with email continues to suck.
I believe I have https://indiestorygeek.com's email stuff correctly configured for SPF, DKIM, and DMARC and yet we still started getting a bunch of bounces recently.
Since people have to click a link in the welcome email to activate their user account, if they don't get that email they can obviously never do that. Which is a problem.
I spent much of yesterday on this problem trying to figure it out.