I set up Let’s Encrypt some months ago and I just received the following mail:
Your certificate (or certificates) for the names listed below will expire in 9 days (on 25 Oct 16 13:21 +0000). Please make sure to renew your certificate before then, or visitors to your website will encounter errors.
For any questions or support, please visit https://community.letsencrypt.org/. Unfortunately, we can’t provide support by email.
Is it OK? Have I something to do?