Hello there, I recently installed an ISPConfig on a clean debian 10 (both latest versions). For the panel I made a webdomain login.domain.tld and got a LE Cert. After that I installed the ordinary page domain.tld. together with some subdomains like mail.domain.tld etc. Now if someone uses domain.tld in his email server settings he will get a cert error because the DNS-Name login.domain.tld (which I also use for MX) is not in the certificate list, what is kinda understandable. My question now is: How to join the login. subdomain to all the others? My solution would be: - backup /etc/letsencrypt - delete webdomain login.domain.tld - delete login.domain.tld with the "certbot delete" command - make a subdomain login.domain.tld in ispconfig and activate LE SSL Do you expect any errors or any flaws with my solution? Are there some disadvantages? Should I keep it and change the MX-Records?