Preventing email abuse with WHM

Expertise level: Medium 

Email abuse is easily mitigated with cPanel's WHM interface. Here are five steps to take appropriate preventative measures to prevent abuse: 

1. Enable WHM's SMTP restrictions
2. Preventing the 'nobody system user' from sending email 
3. Enable suPHP and suExec or mod_ruid2
4. Configure the max hourly email setting 
5. Configure high failure rate protection

Implementing all five of these strategies will provide the most optimal outcome.