Cisco Cisco Email Security Appliance C680 User Guide

AsyncOS provides several methods for rewriting Envelope Sender and Recipient addresses in the email 
pipeline. Rewriting addresses can be used, for example, to redirect mail sent to a partner domain or to 
hide (“mask”) your internal infrastructure.

Ethernet interface: Data 2

IP interface: PublicNet (e.g. 192.168.2.1)

Public Listener: InboundMail 

SMTP

IronPort Email 

Security appliance

The 

smtproutes

 command was 

used to route mail accepted on the 
public listener InboundMail for 

example.com 

to the host 

exchange.example.com

. 

Ethernet interface: Data 1

IP interface: PrivateNet (e.g. 192.168.1.1)

Host Access Table (HAT):

WHITELIST:      $TRUSTED 

BLACKLIST:      $BLOCKED

SUSPECTLIST:    $THROTTLED

UNKNOWNLIST:    $ACCEPTED

ALL:            $ACCEPTED

Recipient Access Table (RAT):

exchange.example.com