I’ve received this mail 2-3 times now:
Your certificate (or certificates) for the names listed below will expire in 9 days (on 03 Apr 19 14:54 +0000). Please make sure to renew your certificate before then, or visitors to your website will encounter errors.
We recommend renewing certificates automatically when they have a third of their
total lifetime left. For Let’s Encrypt’s current 90-day certificates, that means
renewing 30 days before expiration. See
https://letsencrypt.org/docs/integration-guide/ for details.
But as far as I can see these two certs are not about to expire. One expires on may 12th, the other sometime in june…