Hello,
Your certificate (or certificates) for the names listed below will expire in 20 days (on 10 Sep 18 14:58 +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.
cloud.ffnw.de
For any questions or support, please visit https://community.letsencrypt.org/. Unfortunately, we can't provide support by email.
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Regards,
The Let's Encrypt Team