Email that is temporarily undeliverable as a result of various connection issues is sent to the delayed messages queue. Delayed messages may be automatically resent by the system. See Handling undelivered messages for information about setting the delayed messages delivery retry interval and configuring a notification message to be sent for undelivered email.

Delayed message delivery may also be scheduled for a future date using a custom content filter action. See Custom content for information about custom content filters and Creating and configuring a filter action for details about scheduling a delayed message delivery.

You may view the messages in this queue and perform any necessary processing activities manually on the Main > Message Management > Delayed Messages page. When the Delayed Messages page appears, the most recent messages are shown. Use the View from/to fields to specify the desired date/time range for the messages you want to see. The calendar includes the following options:

Set the time range in hours and minutes in the entry fields to the right of the calendar. Click the arrow to the right of the View date/time range to display the desired queue items.

You can also perform a keyword search of the message queue, or refine the search by specifying that only senders, recipients, or subjects are searched. If appliances are configured in a cluster, you can also search on the name of the appliance that processed the messages. Enter a keyword and click Search.

You can configure the number of messages per page, between 25 and 100, in the Per page drop-down list in the queue list banner (25 [the default], 50, or 100).