Even if smart mailers as sendmail in 4.2 can handle mail failures,
sites should forward (easily done in 4.2BSD) all mail to uucp, news,
notes, usenet, postmaster, ... to some responsible system administrator.
--
Bjorn Eriksen
ENEA DATA Sweden
UUCP: {decvax,philabs}!mcvax!enea!ber
ARPA: decvax!mcvax!enea!ber at Berkeley