Руководство Пользователя для Cisco Cisco Email Security Appliance C170

The Cisco IronPort appliance offers a unique, layered approach to stopping spam at the email gateway. 
The first layer of spam control, reputation filtering (discussed previously in 

) allows you to classify email senders and restrict access to your email infrastructure based on 

senders’ trustworthiness as determined by the Cisco IronPort SenderBase™ Reputation Service. The 
second layer of defense, scanning, is powered by Cisco IronPort Anti-Spam™ and Cisco IronPort 
Intelligent Multi-Scan technology. Coupled together, reputation filtering and anti-spam scanning offer 
the most effective and highest performing anti-spam solution available today.

Using the Cisco IronPort appliance, it is very easy to create policies to deliver messages from known or 
highly reputable senders — such as customers and partners — directly to the end user without any 
anti-spam scanning. Messages from unknown or less reputable senders can be subjected to anti-spam 
scanning, and you can also throttle the number of messages you are willing to accept from each sender. 
Email senders with the worst reputation can have their connections rejected or their messages dropped 
based on your preferences.

The unique, two-layer approach to fighting spam of the Cisco IronPort appliance provides you with a 
powerful and unprecedented flexibility to manage and protect your enterprise email gateway.

Your Cisco IronPort appliance offers two anti-spam solutions: the Cisco IronPort Anti-Spam engine and 
Cisco IronPort Intelligent Multi-Scan. You can license and enable these solutions on your Cisco IronPort 
appliance, but you cannot enable both for the same policy. Using the Email Security Manager, you can 
quickly and easily specify a different anti-spam solution for different groups of users.