Cannot use Yandex SMTP

We are trying to use Yandex for the ERP communication server. We already created app password from the Yandex, after entering the SMTP details and test, it prompts the following error:
Server is not available at address smtp.yandex.com on port 465 - Error 0 -

What should I do to fix it? Thanks for your help and advice.

Dolibarr version: 15.0.2

Hello,

Dolibarr can not contact the server through port 465
How and where Dolibarr is installed ?

It is installed in our dedicated server with using XAMPP. All outgoing ports are not blocked.

Have you following the steps to create tokens ?
Basically , you need to check with your mail service provider to check if they have any new security settings .

Yes, I created the app password, but it still prompts the same error message, so I changed to another email server and I do not have the problem. I am not sure if it is Yandex problem.