Issue Plesk Migration results in wrong SSL certificate for all mail subdomains

[Maya K. Herrmann]

Hello dear people,

we did a migration from one virtual server with Plesk 12 to another. The new one runs Plesk Onyx v17.8 on an Ubuntu 16.04 LTS machine. I would say that the migration process itself ran pretty well, but afterwards we discovered, that suddenly all mail subdomains from our clients are using a wrong SSL certificate (one from Let's Encrypt, that already was installed on the old virtual Server. This certificate was installed and is used by the domain, which is also listed as the very last entry in the domain listing in Plesk Admin Area).
We searched all Plesk Backend, to resolve that problem, but somehow, we don't manage and lost track of where to look. Even trying to delete the certificate is not working, because of Plesk's error message, that this certificate is used on various domains (yeah, too bad that is!!!).
Does anybody know how to resolve this issue? It is fairly urgent since our clients start to freak out…
Thank you very much for any hint

Maya

 

[Maya K. Herrmann]

Question: is it possible, that every mail.tld.com serves a standard ssl certificate (let's encrypt or even self-signed), which is signed for the exact correct mail.tld.com subdomain? We are heaving real issues here… maybe it is possible to change settings on Plesk console level? But I very much would need help there
Thanks!