Resolved Plesk on Debian 12 and SSL mail SMTP port 465 Problem

[watis]

Server operating system version

Debian 12

Plesk version and microupdate number

18.0.57 #2

Hi, i cannot send mail from Thunderbird over 465 SSL. With 587 it works.
Settings:

 

[watis]

telnet watis.com.pl 465
Trying 127.0.1.1...
Connected to watis.com.pl.
Escape character is '^]'.

telnet watis.com.pl 587
Trying 127.0.1.1...
Connected to watis.com.pl.
Escape character is '^]'.
220 watis.com.pl ESMTP Postfix (Debian/GNU)

 

[Peter Debik]

Why can't the default server certificate (for the server name) not be used to secure the mail server?

 

[watis]

plesk repair mail solved problem

 

[watis]

Why can't the default server certificate (for the server name) not be used to secure the mail server?

I'm using different domain for a server.