IBJoel thanks. I got a set of emails this morning. If you have any details of what worked to fix this, perhaps you guys can send by PM. I'll likely not understand all of it, but I've had issues with this account in other places, and this info may help.
Appreciate the support!
Cheers.
I'm pretty sure it was random. At some point, we sent you an email and it bounced, probably just a random downtime or maintenance cycle on your end, normal stuff. Then because repeatedly sending bounced emails harms our email legitimacy ranking, we put you on a "do not send" list. I do not understand how the latter part of my explanation works, but here we are.