Installing Letsencrypt

==== Required information ====
- iRedMail version (check /etc/iredmail-release):
- Linux/BSD distribution name and version:
- Store mail accounts in which backend (LDAP/MySQL/PGSQL):
- Web server (Apache or Nginx):
- Manage mail accounts with iRedAdmin-Pro?
- [IMPORTANT] Related original log or error message is required if you're experiencing an issue.
====

When configuring Postfix/Dovecot/Apache/Nginx to use Letsencrypt in your tutorial "http://www.iredmail.org/docs/use.a.boug … icate.html",

Do you replace the default certificates:

    ssl_cert = </etc/pki/tls/certs/iRedMail.crt
    ssl_key = </etc/pki/tls/private/iRedMail.key

    SSLCertificateFile /etc/pki/tls/certs/iRedMail.crt
    SSLCertificateKeyFile /etc/pki/tls/private/iRedMail.key

with the new certificate:
        ssl = required
    ssl_cert = </etc/pki/tls/certs/server.crt
    ssl_key = </etc/pki/tls/private/server.key
    ssl_ca = </etc/pki/tls/certs/server.ca-bundle

        SSLCertificateFile /etc/pki/tls/certs/server.crt
    SSLCertificateKeyFile /etc/pki/tls/private/server.key

OR

do you add the new certificates in new lines to the default certs?