[comp.mail.sendmail] What return code is expected for failed mail?

mb@rex.cs.tulane.edu (Mark Benard) (07/14/89)

When a mailer is able to handle mail passed to it by sendmail, what
return code should it exit on so that sendmail will return an 'unknown
host' or similar error message to the sender?
-- 
Mark Benard
Department of Computer Science     INTERNET & BITNET: mb@cs.tulane.edu
Tulane University                  USENET:   [{ames,bionet}!]rex!mb
New Orleans, LA 70118

cfe+@andrew.cmu.edu (Craig F. Everhart) (07/14/89)

What's wrong with EX_NOHOST, defined in /usr/include/sysexits.h?