If you need to automate, https://github.com/hestiacp/hestiacp/blob/master/bin/v-update-letsencrypt-ssl might be a starting point for a script that renews the ssl certs, it will also handle certs used by the email stack.
If you need to automate, https://github.com/hestiacp/hestiacp/blob/master/bin/v-update-letsencrypt-ssl might be a starting point for a script that renews the ssl certs, it will also handle certs used by the email stack.