zimbra: multiple letsencrypt certificates and Unable to start TLS error

The following guide is tested against zimbra 8.8: Installing a Let’s Encrypt SSL Certificate If this error occurs: ‘Unable to start TLS: hostname verification failed when connecting to ldap master.‘ make sure you have included your hostname in your letsencrypt signing domains and follow the guide once again. For instance, if your hostname is mail5.example.com, […]

install certbot on ubuntu 16.04

On Ubuntu systems, the Certbot team maintains a PPA. Once you add it to your list of repositories all you’ll need to do is apt-get the following packages. $ sudo apt-get update $ sudo apt-get install software-properties-common $ sudo add-apt-repository ppa:certbot/certbot $ sudo apt-get update $ sudo apt-get install python-certbot-apache Reference: https://help.ubuntu.com/community/Repositories/Ubuntu#Adding_PPAs