SSL/TLS Error in my project that was not weong before

Hi everyone, I ran a project that was not wrong before and now the error get mail message for this reason:
RemoteException wrapping MailKit.Security.SslHandshakeException: An error occurred while attempting to establish an SSL or TLS connection.
One possibility is that you are trying to connect to a port which does not support SSL/TLS.”

do you know how to help me understand what has changed since SLL is correctly set on my PC again and I can easily reach the web mail?
thank you very much to those who will know :wink:

Kindly have a view on this thread hope it would help you

Cheers @pam

Can you check if the connection you are trying to do is working manually? SSL connection needs to be public if you want to access it in other networks

yes it works manually

Can you check the config file to set the trust server attribute to true?

How to check it…?

How to check it…?