KB01120905 What is the general procedure for clearing outgoing mail problems?Without knowing what the problem is, you can clear most stuck messages with the following procedure:
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Pause the outbound router
You can do that by selecting "Active Connections" in the tree view (left hand pane) of the console then right-clicking the "Mail Router (Out)" entry in the list view (right hand pane) and choosing "Suspend" from its context menu.
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Expire the dynamic cache
You do that via Console | Options | Outgoing Mail | Delivery Options tab | Advanced Routing Tables | Dynamic Routing Table.
Select each entry in the table in turn and click on the "Expire Selected Records" button to remove all the records.
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Clear host assignments
In the tree view of the console, select the "Outgoing Mail" object then choose "Clear Host Assignments" from its context menu.
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Restart the outbound router |