If you are  subscribed to a list without the  REPRO option, LISTSERV will
avoid sending  mail back to the  address the message comes  from. If this
address is not in  the list, LISTSERV will check for  an address with the
same username and an equivalent hostname. But if you are subscribed twice
with equivalent  addresses, one of  them will get the  message. Generally
speaking, being subscribed twice makes no  sense: it is a state which has
to be supported as new mappings  are entered every month in BITEARN NODES
and subscriptions which used to  be different become equivalent, but that
doesn't mean it is a desirable thing to have for your subscriptions.
 
  Eric