Hey, I built an SMTP server on Centos 7 VPS using Webmin and I installed Mailwizz Application, But when I want to add my server to Mailwizz I get this message Connection could not be established with host mail.domain.net :stream socket clie...

I got mysql database on a VPS In 24 hours ive had 125 failed attempts, shown in the query stats. Do you have good server and mysql experience? I have CentOS and Webmin. You will login to my PC via teamviewer and resolve this issue to find o...