Resolved 17.8.11 U2 Certificate not used although it is selected

[jamin587]

Securing Plesk is ok, but mailserver uses certificate from domain.

plesk: mail.domain.com:8443 => Certificate for mail.domain.com
mail: mail.domain.com => Certificate for domain.com/www.domain.com/webmail.domain.com

Additionally:
I could only update from U1 to U2 with setting the used Certificate for domain.com to mail.domain.com. Before that there was always an timeout on https://mail.domain.com:8447, with something being wrong with TLS Handshake.

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[jamin587]

Mail Server

Plesk

 

[jamin587]

More Info
Mailservice is working. But i used Nextcloud to authenticate against smtp by {mail.domain.com:143/imap/tls} which worked with Plesk 17.5.3. I was able to open https://mail.domain.com:443/ too. I now use {mail.domain.com:993/imap/ssl/secure/readonly} and Nextcloud works again.


Ok i found my problem:
The IP address is distributed as: shared instead of dedicated solved https://mail.domain.com:443/ being accessible again