The domain name doesn't appear to be blacklisted. I CBA implementing HTTPS on it, though.
(, Sun 24 Oct 2021, 16:45, Reply)
And now they're back.

(, Sun 24 Oct 2021, 17:26, Reply)
Some will block outright. I'd advise getting SSL sorted. It's easy enough to do and Let's Encrypt certs are free, so nice and cheap
(, Sun 24 Oct 2021, 18:58, Reply)
I use it for the web interface on the NAS at work. However, unless you are able to automate the renewal process (work's website host doesn't support it), it's a PITA. I'm not sure if my web host supports it -- I might look into it when I'm not so busy with work.
(, Mon 25 Oct 2021, 0:58, Reply)