Cisco Cisco Email Security Appliance C680 User Guide

C150/160 customers: By default, the 

systemsetup

 command configures one 

public listener for both receiving mail from the Internet and for relaying email 
from your internal network. See 

. 

When you define a listener, you specify the following attributes: 

A name (nickname) created by you to refer to the listener later. For example, 
the listener that accepts email from your internal systems to be delivered to 
the Internet may be called OutboundMail.

One of the IP interfaces (that you created earlier in the 

systemsetup

 

command) on which to receive email.

The name of the machine(s) to which you want to route email (public listeners 
only). (This is the first 

smtproutes

 entry. See “Routing Email for Local 

Domains” in the Cisco IronPort AsyncOS for Email Advanced Configuration 
Guide for more information.)

Whether or not to enable filtering based on SenderBase Reputation Scores 
(SBRS) for public listeners. If enabled, you are also prompted to select 
between Conservative, Moderate, or Aggressive settings.

Rate-limiting per host: the maximum number of recipients per hour you are 
willing to receive from a remote host (public listeners only).

The recipient domains or specific addresses you want to accept email for 
(public listeners) or the systems allowed to relay email through the appliance 
(private listeners). (These are the first Recipient Access Table and Host 
Access Table entries for a listener. See 

 for more information.)

The following examples of creating a public and private listener apply to 
X1050/1060/1070, C650/660/670, and C350/360/370 customers only. IronPort 
C150/160 customers should skip to the next section 

. 

In this example portion of the 

systemsetup

 command, a public listener named 

InboundMail is configured to run on the PublicNet IP interface. Then, it is 
configured to accept all email for the domain 

example.com

. An initial SMTP route