Cisco Cisco Email Security Appliance C160 Guía Del Usuario
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Cisco IronPort AsyncOS 7.5 for Email Advanced Configuration Guide
OL-25137-01
Chapter 2 Configuring Routing and Delivery Features
maximum retry interval of 60 seconds. Thus, the second retry attempt is made at
approximately t=120. Immediately after this retry attempt, the system generates a
hard bounce message for that recipient because the maximum number of retries is
two.
approximately t=120. Immediately after this retry attempt, the system generates a
hard bounce message for that recipient because the maximum number of retries is
two.
In Example 2, the first delivery attempt is made at t=0 and the first retry is made
at t=60. The system hard bounces the message immediately before the next
delivery attempt (scheduled to occur at t=120) because it has exceeded the
maximum time in queue of 100 seconds.
at t=60. The system hard bounces the message immediately before the next
delivery attempt (scheduled to occur at t=120) because it has exceeded the
maximum time in queue of 100 seconds.
Delivery Status Notification Format
Bounce messages generated by the system, by default, use the Delivery Status
Notification (DSN) format for both hard and soft bounces. DSN is a format
defined by RFC 1894 (see
Notification (DSN) format for both hard and soft bounces. DSN is a format
defined by RFC 1894 (see
http://www.faqs.org/rfcs/rfc1894.html
) that
“defines a MIME content-type that may be used by a message transfer agent
(MTA) or electronic mail gateway to report the result of an attempt to deliver a
message to one or more recipients.” By default, the delivery status notification
includes an explanation of the delivery status and the original message if the
message size is less than 10k. If the message size is greater than 10k, the delivery
status notification includes the message headers only. If the message headers
exceed 10k, the delivery status notification truncates the headers. If you want
include messages (or message headers) that are greater than 10k in the DSN, you
can use the
(MTA) or electronic mail gateway to report the result of an attempt to deliver a
message to one or more recipients.” By default, the delivery status notification
includes an explanation of the delivery status and the original message if the
message size is less than 10k. If the message size is greater than 10k, the delivery
status notification includes the message headers only. If the message headers
exceed 10k, the delivery status notification truncates the headers. If you want
include messages (or message headers) that are greater than 10k in the DSN, you
can use the
max_bounce_copy
parameter in the
bounceconfig
command (this
parameter is only available from the CLI).
Table 2-7
Example 2: Bounce Profile Parameters
Parameter
Value
Max number of retries
100
Max number of seconds in queue
100 seconds
Initial number of seconds before retrying
60 seconds
Max number of seconds to wait before retrying
120 seconds