>My last resort is to unsubscribe the user and stop further notices.
 
SET them all to  NOMAIL and tell them their access  will be restored when
their gateway  gets fixed. If they  find out how to  recover access, just
SERVE them off.  Even better, if it's one of  those gateways that doesn't
go through  your mailer but just  sends the stuff via  RSCS, simply SERVE
the gateway's NJE  address OFF. Having the users complain  to the gateway
owner is  usually much more efficient  than having you do  it, especially
when they're  sitting in the same  building and can do  some squatting in
his office until he solves the problem :-)
 
  Eric