Cisco Cisco Email Security Appliance C160 Références techniques

The listenerconfig command allows you to create, edit, and delete a listener. 
IronPort AsyncOS requires that you specify criteria that messages must meet in 
order to be accepted and then relayed to recipient hosts — either internal to your 
network or to external recipients on the Internet.

These qualifying criteria are defined in listeners; collectively, they define and 
enforce your mail flow policies. Listeners also define how the IronPort appliance 
communicates with the system that is injecting email.

Unique nickname you supply for the listener, for future reference. 
The names you define for listeners are case-sensitive. AsyncOS does 
not allow you to create two identical listener names.

Listeners are assigned to IP interfaces. All IP interfaces must be 
configured using the 

systemstartup

 command or the 

interfaceconfig

 command before you create and assign a listener 

to it.

The mail protocol is used for email receiving: either ESMTP or 
QMQP

The specific IP 
port used for 
connections to the 
listener. by default 
SMTP uses port 
25 and QMQP 
uses port 628.