Here are the revised packages for SD.EmailMonitorMulti - for Servicedesk version 8.x. They contain some small fixes that were discovered as a part of the 8.x Email Monitor as well.
Please remember that you need to publish both packages. You should also use the SD.EmailServerAccountAdmin application to administer the various email accounts that will be monitored.
It is also recommended that, prior to installation, you remove the original email monitor from IIS. This will avoid any conflicts.