Codeigniter and Cyberpanel SMTP issue?

Hello,

I installed a Codeigniter version 3.1.11 script on cyberpanel. While everything is working fine, smtp does not work when I use Cyberpanel's smtp build. When I enter the smtp information of an e-mail address I created in cPanel in the smtp section of this script that I have installed on Cyberpanel, it works without any problems. I think the problem is between cyberpanel and codeigniter but I don't know what. Is there anyone who can help with this?