Email Spoofing

I am using CyberPanel for a long time. Now, I saw a major security issue with CyberPanel. My multiple clients are getting thousands of outgoing emails from their cyber panel. Not once, almost all servers that installed CyberPanel, had the same issue.

Some days ago, I got the same issue, and then I reinstalled the whole CyberPanel. But the issue is still. I have more than 7000 pages of email in my inbox and the Outggoint box is empty.

I experienced this with one of my website and still investigating.

I am facing this issue on multiple server that has CyberPanel