Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The 

altsrchost

 command provides the simplest and most straightforward 

method to segment each IronPort appliance into multiple IP interfaces (Virtual 
Gateway addresses) from which to deliver email. However, users requiring more 
power and flexibility in mapping messages to particular Virtual Gateways should 
investigate the use of message filters. See 

 for more information. 

The 

altsrchost

 command allows you to control which IP interface or interface 

group to use during email delivery based on one of the following:

the sender’s IP address

the Envelope Sender address

To specify which IP interface or interface group the system will deliver email 
from, you create mapping keys that pair either the sender’s IP address or the 
Envelope Sender address to an IP interface or interface group (specified by 
interface name or group name). 

IronPort AsyncOS will compare both the IP address and Envelope Sender address 
to the mapping keys. If either the IP address or Envelope Sender address matches 
one of the keys, the corresponding IP interface is used for the outbound delivery. 
If there is no match, the default outbound interface will be used.

The system can match any of the following keys and take preference in the 
following order:

The IP address of the sender must match exactly.

Example: 

192.168.1.5

The Envelope Sender must match the entire address exactly.

Example: 

username@example.com

The system will match username syntax against the 
Envelope Sender address up to the 

@

 sign. The 

@

 sign must 

be included. Example: 

username@

The system will match domain name syntax against the 
Envelope Sender address starting with the 

@

 sign. The 

@

 sign 

must be included. Example: 

@example.com