Issue Postfix uses old cert for local connections only

[iam_bosko]

Hey Plesk-Community,

i suddenly ran into a strange problem with my postfix service.
The mail-service is still running fine and so do the ssl-certificates. All clients are connecting properly via smtp.
But when i try connecting locally e.g. via openssl to smtp i get an verification error (10) which menas, the cert is expired. This is not the actual certificate which is used by remote-connections! What am i overseeing here?

I have configured the certificate for postfix over plesk in "Tools / Security / SSL-Certificates / Mail Service" - like i said. remotely this is working just fine.

Thank you in advance!

Harry

 

[iam_bosko]

In addition: i checked the certificate with OpenSSL again and found, that the certificate-cipher is the same (correct). The Only difference is, that executed from local, the attribute "depth" is
"3" and from "Digital Signature Trust Co., CN = DST Root CA X3 - which is remotely
"1" and from Let's Encrypt, CN = R3