Please fill out the fields below so we can help you better. Note: you must provide your domain name to get help. Domain names for issued certificates are all made public in Certificate Transparency logs (e.g. crt.sh | example.com), so withholding your domain name here does not increase secrecy, but only makes it harder for us to provide help.
I've got an email: yourelegantshoes.russianforyou.org: The SSL certificate expires on Jan 25, 2026 at 10:08:31 AM UTC. At the time of this notice, the certificate will expire in “19 days, 2 hours, 30 minutes, and 1 second”.
My hosting provider can't renew it. And I have no idea what Let's Encrypt is and how SSL was issued by them for my domains/websites.
Why not? If you have no idea who Let's Encrypt is, almost certainly you didn't get the cert in the first place, which would indicate your hosting provider did. Why can't they renew it? What have they told you? And for that matter, who is it?
Yes, that domain currently has certificates issued by Let's Encrypt. The public certificate logs show that that's been the case for quite some time. That means that there has been some software running somewhere automatically requesting it for that domain. That's good and generally how it should be working. If you're not the server administrator that runs that program, you need to figure out who it is and where. Usually on any kind of "shared hosting" (rather than a hosting that gives you a VM to manage yourself), they handle that for you automatically. If they suddenly "can't renew it", then you'd have to ask them why. Maybe they're related to whoever sent you that email. There isn't anything that anybody else can do for you, only the people running the servers for a domain can do anything with a certificate even if you had one.