I would like to understand how the renewal of let's encrypt works; I explain better.....
I successfully renewed the site's certificate on ubuntu, in fact by typing the command ./ssl-cert-check -s site-example -p 443, I am shown the new expiry date at the end of March.
The problem is that I keep getting emails that my certificate will expire in a few days.
if you add or removed a subdomain, server doesn't consider it as renewal and send email to you. you can safely ignore those mails
It's all explained in the expiry email documentation at Expiration Emails - Let's Encrypt which was also linked in those same emails.
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