In reviewing the list of subscribers, I see that none are
at XEROX.  Unfortunately, being just a user of PSUVM, I
can not see the many that are CONCEALed and would investigate
those if I could.
 
I suggest e-mail to the XEROX postmaster asking for assistance
in tracing the RCPT TO address if the CONCEAL does not reveal.
 
/Pete Weiss at Penn State