Cisco Cisco Email Security Appliance C160 Mode D'Emploi
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User Guide for AsyncOS 10.0 for Cisco Email Security Appliances
Chapter 26 Configuring Routing and Delivery Features
Directing Bounced Email
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By default, the system generates a bounce message and sends it to the original sender for each hard
bounced recipient. (The message is sent to the address defined in the Envelope Sender address of
the message envelope. Envelope From is also commonly referred to as the Envelope Sender.) You
can disable this feature and instead rely on log files for information about hard bounces. (See the
“Logging” chapter.)
bounced recipient. (The message is sent to the address defined in the Envelope Sender address of
the message envelope. Envelope From is also commonly referred to as the Envelope Sender.) You
can disable this feature and instead rely on log files for information about hard bounces. (See the
“Logging” chapter.)
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Soft bounces become hard bounces after the maximum time in queue or the maximum number of
retries, whichever comes first.
retries, whichever comes first.
Bounce Profile Parameters
When configuring a bounce profile, the following parameters control how conversational bounces are
handled per message:
handled per message:
Table 26-5
Bounce Profile Parameters
Maximum number of
retries
retries
The number of times the system should try to reconnect to the recipient host to
re-deliver the soft bounced message before treating it as a hard bounced
message. The default is 100 retries.
re-deliver the soft bounced message before treating it as a hard bounced
message. The default is 100 retries.
Maximum number of
seconds in queue
seconds in queue
The amount of time the system should spend trying connect to the recipient host
to re-deliver the soft bounced message before treating it as a hard bounced
message. The default is 259,200 seconds (72 hours).
to re-deliver the soft bounced message before treating it as a hard bounced
message. The default is 259,200 seconds (72 hours).
Initial number of
seconds to wait before
retrying a message
seconds to wait before
retrying a message
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 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.
Maximum number of
seconds to wait before
retrying a message
seconds to wait before
retrying a message
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.
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.