Stop my VPS server from spamming?

I have a VPS server and one of my accounts has been compromised.
I am still trying to find the code that allows for upload of these spamming files but for now I have just terminated the account on the server.

Just wondering if there is a setting I can change in WHM/CPANEL that will stop emails being sent with fake headers, perhaps only allowing headers from account on my VPS?

mail() on [/home/mywebsite/public_html/mail.php(586) : eval()'d code(2) : eval()'d code(1) : eval()'d code(1) : eval()'d code(1) : eval()'d code(1) : eval()'d code(1) : eval()'d code(1) : eval()'d code:185]: To: -- Headers: From: Apple Inc <>  MIME-Version: 1.0  Content-Type: text/html

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remove or deny access to vulnerable form.
Install csf/lsf immediately and also check with number of mails can be sent during per minute under tweak setting of WHM.

also disable the SSH shell access (if not needed) for the users, because it is quiet common to install rootkit using SSH under CPANEL/WHM.


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