Forwarded to devs SSL Certificates Problem after Upgrading to 17.5.3 Update #15

[Christian12]

TITLE:

SSL Certificates Problem after Upgrading to 17.5.3 Update #15​

PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE:

PLESK ONYX 17.5.3 Update #15 LINUX Debian 7.11 64 BIT​

PROBLEM DESCRIPTION:

The Mailserver (Courier Package: courier-imap-ssl Source: courier (0.68.2-1)Version: 4.10.0-20120615-1) is using the
general SSH Certificate (let's encrypt) for the IMAP TLS process, instead of the assigned Certificate to the Domain.​

STEPS TO REPRODUCE:

After the upgrade, I've manually deleted all Lets Encrypt certificates and assigned them again. No Change in the outcome.​

ACTUAL RESULT:

The Mailserver (Courier Package: courier-imap-ssl Source: courier (0.68.2-1)Version: 4.10.0-20120615-1) is using the
general SSH Certificate for the IMAP TLS process. This is assigend in Tools - Security - SSL Certificates - SSL Certificate for E-Mails.​

EXPECTED RESULT:

The IMAP Process used in the past the process. If an SSL Certificate (let's encrypt) was availiable in the Domain. It used this one for the IMAP Process instead of the general one. This should be the solution again.​

ANY ADDITIONAL INFORMATION:

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YOUR EXPECTATIONS FROM PLESK SERVICE TEAM:

Confirm bug​