The Intersite Messaging service failed to remove the following message from the drop directory. File: %1 File folder: %2 ...

The Intersite Messaging service failed to remove the following message from the drop directory. 
 
File:
%1 
File folder:
%2 
Mail 'To:' Field:
%5 
Mail 'From:' Field:
%6 
Mail 'Subject:' Field:
%7 
 
Message processing will stop until this message is removed. 
 
User Action 
Delete the message from the drop directory. 
 
Additional Data 
Error value:
%4 %3