I manage many Exchange boxes for various clients. This past year the badmail directory has become a cronic problem because it is filling up and wreaking havoc on server performance and even causing the backup jobs to fail.
The question is how to best deal with this. Just deleting this badmail folder full of files is not the answer, because it just keeps filling back up. I would like to have a solution that deals with the cause of all this "badmail", which I assume is just lost spam. I have written batch files that automatically delete the badmail contents by executing a couple of times a day to keep it from building up, but I'd really like to see this stuff bounced from the server before it became "badmail".
Some of my clients use a server based spam software that keeps the folder manageable, but they too would allow the badmail directory to grow if it wasn't monitored.