How to purge the MiddleQueue and Private Queues ( ONLY)

Answer

Perform the following procedure to purge the MiddleQueue and Private Queues.

1. Stop the IIS Admin service (or the Microsoft Exchange Transport Service, if installed on a Microsoft Exchange 2007 / 2010 server, and all the dependent services
2. Stop the GFI MailEssentials AS Scan Engine and GFI MailEssentials AV Scan engine, and disable them, so they do not restart
3. Wait for 30 seconds to ensure that the items in the MSMQ are processed by the GFI Attendant services
4. Stop the GFI MailEssentials Managed Attendant Service
5. Go to Start > Run > type compmgmt.msc and click OK
6. The computer management MMC will open
7. Go to the Services and Applications node and browse to Message Queuing
8. Open the Private Queues
9. There should be the GFI MailEssentials queues
10. Expand a queue and two new nodes will appear, Queue Messages and Journal Messages
    1. Right click Queue Messages, select All Tasks > Purge
    2. A confirmation window will appear
    3. Press OK to clear all messages in the queue
    4. Repeat these steps for all queues 
11. This will clear the queues. To check if the messages were cleared, navigate back to Private Queues and press the Refresh icon on the toolbar. Now all queues should show zero items.
12. Go to the folder ..MailEssentials\Antispam\Middlequeue and move the files to a safe folder elsewhere. These files will be renamed with the extension .eml and dropped back into the Microsoft Exchange Pickup folder to be reprocessed later.
13. Go to the folder MailEssentials\EmailSecurity\Middlequeue and move the files to a safe folder elsewhere. These files will be renamed with the extension .eml as well and dropped back into the Microsoft Exchange Pickup folder to be reprocessed later.
14. Restart the services stopped in (1), (2) and (4) 
15. Check, if the problem persists