I would remove the following subscription:
 
[log in to unmask]             Srinivas P. Gandhi
 
Apparently this address has become invalid and the rejection message is
coming back to the list in an unrecognizable format and through a gateway
that chops ".HARVARD.EDU" off of the return address (or fails to add it).
 
Mark R. Williamson, Rice U., Houston TX; [log in to unmask] or @RICEVM1