> I believe I have determined that MS
> Exchange 2003 operates this way so that identical messages are not
> delivered to the same email accounts.  

Right.

> Does anyone know how to get both
> messages to deliver dispite going through Exchange 2003?

Define a BOTTOM_BANNER and/or a BOTTOM_BANNER_HTML template for each list, with something different in it; for example, the name of the list, or the usual "To unsubscribe from XXX, do the following".

Jean Bédard