Cisco Cisco Email Security Appliance C390 사용자 가이드

The Incoming and Outgoing summary sections provide access to real-time 
activity of all mail activity on your system and is comprised of the Incoming and 
Outgoing Mail Graphs and Mail Summaries. You can select the time frame on 
which to report via the Time Range menu. You can select Hour, Day, Week, or 
Month. The time range you select is used throughout all of the Email Security 
Monitor pages. The explanations of each type or category of message are below 
(see 

).

The mail trend graph (left side, 

) shows the breakdown of incoming 

mail in real-time. 

While the mail trend graph displays a visual representation of the mail flow, the 
summary table (right side, 

) provides a numeric breakdown of the same 

information. The summary table includes the percentage and actual number of 
each type of message, including the total number of attempted, threat, and clean 
messages.

The outgoing graph and summary show similar information for outbound mail.

The method Email Security Monitor uses to count incoming mail depends on the 
number of recipients per message. For example, an incoming message from 
example.com sent to three recipients would count as three messages coming from 
that sender.

Because messages blocked by reputation filtering do not actually enter the work 
queue, the appliance does not have access to the list of recipients for an incoming 
message. In this case, a multiplier is used to estimate the number of recipients. 
This multiplier was determined by IronPort Systems, Inc. and based upon research 
of a large sampling of existing customer data.