I'm sorry, there is no discrepancy between  1.5i and 1.5j. Both of them have
the same statement:
 
                If domain ^= '' Then Return 0
 
  Whether or not an  ACK=YES field is propagated is irrelevant.  By the way it
only means the  same thing as having  ACK=YES on the local list.  The point is
that routine SENDLIST does:
 
  Parse var fromid '@' '.'domain
 
and then  you have the IF  I quoted above. If  it doesn't work, there  are two
explanations:
 
1) DOMAIN  gets disrupted  somewhere. It's  used before  (in the  mail parsing
   routine) and after, but only in PROCEDUREs.
 
2) FROMID is incorrect. I'd say the problem is here, but can't see why...
 
Eric