Cisco Cisco Email Security Appliance C160 Mode D'Emploi

File reputation and file analysis services. 

Computers that are allowed to relay email through the Cisco appliance via a 
private listener. Allowed hosts are defined by their hostnames or IP addresses.

Sophos and McAfee Anti-Virus scanning engines provide cross-platform 
anti-virus protection, detection and disinfection. through virus detection engines 
which scans files for viruses, Trojan horses and worms. These programs come 
under the generic term of malware, meaning “malicious software.” The 
similarities between all types of malware allow anti-virus scanners to detect and 
remove not only viruses, but also all types of malicious software. 

A list of known bad senders. By default, senders in the Blacklist sender group of 
a public listener are rejected by the parameters set in the $BLOCKED mail flow 
policy.

Double Byte Character Sets are foreign-language character sets requiring more 
than one byte of information to express each character.

Classless Inter-Domain Routing. A convenient shorthand for describing a range 
of IP addresses within their network contexts using an arbitrary number of bits. 
Using this notation, you note the network prefix part of an address by adding a 
forward slash (/) followed by the number of bits used for the network part. Thus 
a Class C network can be described in prefix notation as 192.168.0.1/24. A 
CIDR specification of 206.13.1.48/25 would include any address in which the 
first 25 bits of the address matched the first 25 bits of 206.13.1.48.

Content-based filters used to process messages during the Per-Recipient 
Scanning phase of the work queue in the email pipeline. Content filters are 
evoked after Message filters, and act on individual splintered messages.