Note: My server had been properly configured with a correctly functioning “Lets Encrypt” certificate for the past 2-3 years. And I guess that it must have been automatically updated regularily via the respective plesk configuration during those years (it’s been running so long that I don’t even remember if I had done any manual configuration steps when I first activated it - also via plesk - some years ago). The problem suddenly started today 23-Dec-2019 and for some reason the currently used certificate is valid 24-Sep-19 to 23-Dec-19, i.e. it expired today and WASN’T replaced by a new one in time and now all the web browers obviously complain when accessing my domain.
The same certificate is used for my 2 sub-domains www.wothke.ch and webmail.wothke.ch.
I am not aware of any recent changes on “my” server - and in case my hoster actually did change something on the configuration, he doesn’t tell me. (In fact he acts as if he wanted to convice his existing “Lets Encrypt” users to switch to some of the other offerings that he is trying to sell.)
I already tried to use the respective plesk UI to manually trigger an update of the certificate and the “success message” in the plesk UI suggests that a new “Lets Encrypt” certificate has actually been installed - however that “new” certificate then still uses that very same expired validity range and produces the very same problems.
Any ideas where the problem originates and what to do about it?
My domain is: webmail.wothke.ch
I ran this command: https://webmail.wothke.ch
It produced this output: “This certificate has expired or is not yet valid.
Valid from 24-Sep-19 to 23-Dec-19”
My web server is (include version): I guess that my hoster is using nginx and my only means to manipulate the servers configuration is through the PLESK UI that my hoster provides. I have no idea what exact version he might be using.
The operating system my web server runs on is (include version): no idea, probably Linux
My hosting provider, if applicable, is: servertown.ch
I can login to a root shell on my machine (yes or no, or I don’t know): no
I’m using a control panel to manage my site (no, or provide the name and version of the control panel): plesk (I didn’t see any version number in that crappy UI; but here is a link to the respective login page in case that migh help https://www05.servertown.ch:8443/)
The version of my client is (e.g. output of
certbot --version or
certbot-auto --version if you’re using Certbot): na