Nope, still not receiving any email alerts.
Sorry
Yep, I know. We're sending them out but they're not being accepted. Your email host is a fussy one and even before it gets to your email system it is almost certainly being refused.
I reluctantly gave up on the struggle recently and started using a third-party host to send transactional mails. I use Amazon's SES, which allegedly stands for "Simple Email Service" though nothing with
AWS▸ is ever simple. But it works and the emails get delivered, which means I no longer have to answer queries about "my registration email hasn't arrived, how do I log in". There are lots of alternatives which tend to be easier to set up, but at a higher per-email cost.
https://www.mail-tester.com is really good for diagnosing mail deliverability issues though not foolproof.
edit: AWS in this case isn't Automatic Warning System (prevents
SPADs▸ aka Signals Passed At Danger) but Amazon Web Services (prevents SPADs aka Server Panics And Dies).