Cisco Cisco Email Security Appliance C170 Guía Del Usuario

The amount of time the system should wait before the first 
attempt to re-deliver the soft bounced message. The default is 
60 seconds. Set the initial retry time to a high value to reduce 
the frequency of soft bounce attempts. Conversely, to increase 
the frequency, lower the value. 

The maximum amount of time the system should wait before 
trying to re-deliver the soft bounced message. The default is 
3,600 seconds (1 hour). This is not the interval between each 
subsequent try; rather, it is another parameter that can be used 
to control the number of retries. The initial retry interval is 
limited on the high end by the maximum retry interval. If the 
calculated retry interval period exceeds the maximum retry 
interval then the maximum retry interval is used instead.

Specify whether hard bounce message generation is enabled or 
disabled. If it is enabled, you can choose the format of the 
message. By default, bounce messages generated use the DSN 
format (RFC 1894). You can select a custom notification 
template to use for bounce messages. For more information, 
see the “Text Resources” chapter of the Cisco IronPort 
AsyncOS for Email Configuration Guide.

You can also choose whether or not to parse the DSN status 
field from the bounce response. If you choose “Yes,” AsyncOS 
searches the bounce response for a DSN status code (RFC 
3436) and uses the code in the Status field of the delivery status 
notification.

Specify whether or not to send delay warnings. If enabled, 
specify the minimum interval between messages as well as the 
maximum number of retries to send.

You can select a custom notification template to use for 
warning messages. For more information, see the “Text 
Resources” chapter of the Cisco IronPort AsyncOS for Email 
Configuration Guide.

You can bounce messages to an alternate address rather than 
the default of the Envelope Sender address.