Perimeter Email Protection is a complete suite of email server security applications. By stopping spam and email based attacks at the perimeter, PEP can reduce email load and spam by 90 percent or more. PEP Filtering and Premium Junk Mail Filters ensures that only clean, valid and properly addressed email is sent to company email servers for final delivery. The service provides email security, email filtering, and delivery back-up for businesses that own and manage on-premise email servers. It prevents spam, viruses, directory harvesting,. dictionary attacks, fraud, phishing schemes, and other debilitating email bombs or attacks.”]
Source: https://www.darkreading.com/attacks-breaches/concentric-reduces-email-load-spam