Cisco Cisco Email Security Appliance C160 Mode D'Emploi

Optionally, enable smart exceptions. This setting allows incoming mail messages, 
and bounce messages generated by internal mail servers, to be automatically 
exempted from bounce verification processing (even when a single listener is used 
for both incoming and outgoing mail).

Submit and commit your changes.

You can use the 

bvconfig

 and 

destconfig

 commands in the CLI to configure 

bounce verification. These commands are discussed in the IronPort AsyncOS CLI 
Reference Guide.

Bounce verification works in a cluster configuration as long as both IronPort 
appliances use the same "bounce key." When you use the same key, either systems 
should be able to accept a legitimate bounce back. The modified header tag/key is 
not specific to each IronPort appliance. 

The 

deliveryconfig

 command sets parameters to be used when delivering email 

from the IronPort appliance. 

The IronPort appliance accepts email using multiple mail protocols: SMTP and 
QMQP. However, all outgoing email is delivered using SMTP, which is why the 

deliveryconfig

 command does not require that the protocol be specified.

Several of the features or commands described in this section will affect, or be 
affected by routing precedence. Please see Appendix B, “Assigning Network and 
IP Addresses” in the Cisco IronPort AsyncOS for Email Configuration Guide for 
more information.