In cPanel, the powerful web hosting control panel, there is an option for users to manage, protect and administer email addresses on their mail server. You can control outgoing mail from the single email account on your server in order to avoid potentially sending out spam.
Receive Notifications of Send Limits
First, log in to your cPanel account. By going into Tweak Settings and entering a high or rare limit on outgoing mail, you can get alerts about accounts that are sending a massive number of emails in a short period of time.
Suspending or Terminating an Account
In case you find an email address with an irregular amount of outgoing mail, you have the option to suspend or terminate the address immediately. In order to stop spam from leaving, you will need to stop all access to the account. Preventing or stopping login access can briefly stop any sort of inbound mail. Simply go to the suspension features located within the Email Accounts section of the cPanel interface and then choose which email address to suspend or remove.
Receiving instant notifications and being able to stop the offending email account will go a long way in stopping potentially dangerous outgoing emails from being sent. A sudden wave of incoming and outgoing emails can also slow down your server and make navigating it much more difficult. These features will help keep a check on spam and automated email errors.