Can't send SMTP or log into host control panel since last night

Logging into website host hangs, sending smtp mail fails. No logs indicating what’s going on.

Any thoughts?

What is the domain?

Several of them. is primary one.

The site loads ok for me in a browser, I wasn’t able to see a log in link. It blocks the ASN of my server, giving a Coudflare 1005 error page, so I assume you have some rules in place.

The mail server indicated by your MX record is accepting connections ok, seems to be with Hostgator.