I tried catching one but was unable to because they passed through so quickly.  I didn't think to stop Core.  Thanks for the suggestion. 

I think I have my original problem solved but I may play with this just out of curiosity.

I am troubleshooting a problem in Mercury/32 and wondering how I could use the contents of a .cnm file to create an .mdd file.  I would like to manually drop it into the MercuryD working directory to be processed, if this would work.  The goal is to determine whether a particular message is causing a delivery failure by Core.

Hm - what's about "catching" a MDD-file to see the difference? May be stopping the Mercury Core Module and initiating MercuryD to get the mails should leave some MDD-files in queue-directory?

just my ideas

 Olaf