Issue Dovecot SNI doesn't seem to be working with Plesk Premium Email Extension (Kolab/Guam)

[peterbo]

I've been investing some serious hours to get Postfix/Dovecot working with SNI certifiactes and the Plesk Premium Email Extension (Kolab) now.

However,

echo | openssl s_client -connect localhost:993 -servername xyz.com

will keep returning the global server's mail certificate, not dovecot's certificate from the local_name section.

Querying the dovecot's IMAP port directly returns the correct certificate (9993):

echo | openssl s_client -connect localhost:9993 -servername xyz.com

How can I make the Plesk Premium Email Extension (Kolab)/Guam SNI compatible? This is quite urgent, because I confirmed a roadmap with this feature after upgrading to Obsidian.

Thank you in advance!

 

[IgorG]

I'd suggest you submit detailed report here Reports