Cisco Cisco Email Security Appliance C160 Mode D'Emploi

The following example of creating a listener applies to C10/100/150/160 
customers only. 

In this example portion of the 

systemsetup

 command, a listener named 

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

example.com

. An initial SMTP route 

to the mail exchange 

exchange.example.com

 is configured. Then, the same 

listener is configured to relay all email for all hosts within the domain 

example.com

. (Note the dot at the beginning of the entry: 

.example.com

)

Rate limiting is enabled, and the maximum value of 450 recipients per hour from 
a single host is specified for the public listener. 

The value you enter for maximum recipients per hour you are willing to receive 
from a remote host is a completely arbitrary value, one that is usually relative to 
the size of the enterprise for which you are administering email. For example, a 
sender who sends 200 messages in an hour might be considered a “spammer” 
(sender of unsolicited bulk email), but if you are configuring the IronPort 
appliance to handle all email for a 10,000 person company, 200 messages per hour 
from a remote host may be a reasonable value. Conversely, in a 50-person 
company, someone sending 200 messages in an hour to you may be an obvious 
spammer. You must choose an appropriate value when you enable rate-limiting on 
a public listener (throttle) inbound email for your enterprise. For more 
information on Default Host Access policies, see 

Use the listenerconfig->EDIT command to customize the listener.

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