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Question Mail subdomains with wrong TLS certificate (e.g. imap.example.tld)

sneppa

New Pleskian
Server operating system version
Ubuntu 22.04.4 LTS
Plesk version and microupdate number
Plesk Obsidian 18.0.58 Update #2
Hi,

currently I'm migrating the websites of a plesk server into a new plesk server.
In the old configuration the users are using the server domain to send/receive emails.
On the new plesk server I have activated the imap.user.tld, smtp.user.tld feature.

Today I migrated 3 websites and have the same issue on every domain:
Instead of the imap.user.tld the client gets the server certificate, configured in "Tools & Einstellungen > SSL/TLS-Zertifikate":
1708160139412.png

In the mail settings of the websites, the certificate of the user.tld is set:
1708160260705.png

I checked the certificate with:
Code:
echo QUIT | openssl s_client -connect smtp.user.tld:465
It returns the server certificate, not the certificate of the users tld.

I reissued all let's encrypt certificates, rebooted the server, but still the same issue.

Similar issue was described in: Resolved - Certificate Invalid

Do you have any recommendations or should I contact the plesk support?

Thank you!
 
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