Automate the deploy of letsencrypt certificates to Zimbra.
Based on Zimbra Article KB 22434 : https://wiki.zimbra.com/wiki/Installing_a_LetsEncrypt_SSL_Certificate
git clone https://github.com/paulo-amaral/Easy-Letsencrypt-Zimbra.git
chmod +x renew_certificate.sh
sh renew_certificate.sh
This script automatic setup a crontab/cron job to schedule the renew of certificate.