I hadn't received the new email either, and I was just about to open a ticket to the hosting provider. Then I had the idea of looking around in cPanel for anything related to spam and I found some "SpamExperts" thing, which had a quarantine, and inside were the confirmation emails and also the one you sent. I don't know much about them because I clicked "release from quarantine" thinking they would be routed to my inbox but they just disappeared.
Anyway, I disabled that filter because I'm not going to login to cPanel every day just to check for possibly missing emails.
And I'm in the process of migration to a better provider anyway.