Emails are not sent from THE BAT! client, how to fix it?

Question

TheBat

Hello!
I am learning the email client The Bat! as part of the laboratory work, and it does not work to send emails to check the performance. Gives the following error:

administrative prohibition -- authorization required. Users in your domain are not allowed to send email without authorization. See www.mail.ru/pages/help/261.html for details.

And even after the configuration, the error did not go away, maybe I configured something incorrectly and I would like to find out what the problem is.