Resolved problem connecting to the mail server with outloock

[Piekielko]

Server operating system version

Debian 11

Plesk version and microupdate number

18.0.48

I have a problem with the mail server, but only with the Outloock mail client. I have no idea what the problem is.
Outlook cannot connect to the server. I have tested in several places in my country and the effect is the same.
my mail server is mail.piekielko.com - IP: 145.239.18.58

 

[Piekielko]

I noticed that the server only supports TLS1.3
Can Outlook have a problem with this?

 

[Maarten]

It depends on the Outlook version.

Did you activate the "Modern ciphers" in Plesk? That will only allow clients that support TLS 1.3. The Intermediate ciphers have a fallback to TLS1.2. That's the recommended setting.

 

[Piekielko]

Yes, that solved the problem. I overclocked the encryption too much. Thx