powie.de Tech Forum

Script:
https://github.com/Powie/plesk_mailcert
Copys Plesk LetsEncrypt CERT to Mailservers and Webmin Script Version: 1.05
The script MAILCERT is used if you secured your plesk server also with an LetsEncrypt certificate, Example: server.mydomain.tld
WARNING! This is experimental and only tested on Debian Systems at this time. Make sure you have backed up your PEM files before usage
Supported:
Plesk 12.5
Debian
Postfix
Dovecot
Courier
Webmin
QMail
Usage:
Install the LetsEncrypt Plesk Extension: https://github.com/plesk/letsencrypt-plesk
Add a webspace with your plesk hostname and secure it with as LetsEncrypt certificate
Edit MAILCERT script and set the hostname to server.mydomain.tld
Run it manually or set up a monthly cron job
Remarks: The MAILCERT Script try\'s to get the actual PEM File from the vhost. This file is changed after each renewal of the LetsEncrypt certificate. If the file exists, it will be copied to the known default pem file of the services. At this time:
Dovecot: /etc/dovecot/private/ssl-cert-and-key.pem
Postfix: /etc/postfix/postfix_default.pem
Courier IMAP: /usr/share/imapd.pem
Courier POP3: /usr/share/pop3d.pem
Webmin: /etc/webmin/miniserv.pem
QMail: /var/qmail/control/servercert.pem
If you have any questions or will get support please contact us at https://forum.powie.de

we  have tested it successfully also on CentOS

And also compatible with ubuntu.
https://github.com/Powie/plesk_mailcert/issues/3