When a communication Module transfers a message or when it rejects a message because of a fatal error, it removes the message from the Module queue. The Module composes a delivery report and passes it to the Dequeuer component.
The Dequeuer component processes delivery information. If requested, it composes Delivery Status Notification (DSN) messages and submits them back to the system for delivery to the original message sender. When a message has several recipients, the Dequeuer component may choose to delay DSN generation, so each DSN message can contain reports about several recipients.
When all message recipients are processed and the message is dequeued from all queues, the Dequeuer component removes the message file from the Queue directory.
Use the WebAdmin Interface to configure the Dequeuer component. Open the Queue page in the Settings realm.
Dequeuer Log: Use this setting to specify what kind of information the Dequeuer component should put in the Server Log. Usually you should use the Major & Failures (delivery reports) level. The Dequeuer component Log records are marked with the DEQUEUER tag.
Processors: Use this setting to specify the number of Dequeuer processors (threads). Usually one Dequeuer thread is enough even for a heavy-loaded server. Only if your Server performs some kind of special message processing and has to generate a lot of DSN messages, should you use several Dequeuer threads.
Reporting Delay: Use this setting to specify the maximum delay between the moment when a message was transferred or failed and the moment when a delivery report is generated. The more the delay, the more reports can be placed in one DSN message. A DSN message is generated immediately after the last message recipient is processed.
On Failure, Return: Use this setting to specify what portion of a failed message should be included into the DSN (error report) message.
Copy Failure Reports: When this option is enabled, all error messages generated with the CommuniGate Pro Dequeuer are sent to both the failed message return-path and to the specified E-mail address.
Send Return-Receipts to: Positive reports (delivery reports and relay reports) are generated only if the message sender has requested them. Use this setting to specify who can request these reports: