Mautic - Configuration - Email Setting - Test Connection Error


I have created an SMTP server on VPS Cyberpanel Hostinger Hosting.
My Email Access web worked fine and I was able to send emails as well.
Now I installed Mautic for bulk emails and configured.
But when Test connection it returns an error.

Please refer to the attached Images and correct me, I need it very urgently. Your early reply will be highly appreciated.
Thanks in advance