Is there an exit code that will cause sendmail
to treat the mail as undeliverable? (unknown
user/host/domain)
Your best source for information would, of course, be the sendmail
documentation. Sendmail is available from:
ftp://ftp.sendmail.org/pub/sendmail
However, here's a summary of what different mailer error codes mean to
sendmail:
# /* 64 USAGE */ " 500 Bad usage",
# /* 65 DATAERR */ " 501 Data format error",
# /* 66 NOINPUT */ ":550 Cannot open input",
# /* 67 NOUSER */ " 550 User unknown",
# /* 68 NOHOST */ " 550 Host unknown",
# /* 69 UNAVAILABLE */ " 554 Service unavailable",
# /* 70 SOFTWARE */ ":554 Internal error",
# /* 71 OSERR */ ":451 Operating system error",
# /* 72 OSFILE */ ":554 System file missing",
# /* 73 CANTCREAT */ ":550 Can't create output",
# /* 74 IOERR */ ":451 I/O error",
# /* 75 TEMPFAIL */ " 250 Deferred",
# /* 76 PROTOCOL */ " 554 Remote protocol error",
# /* 77 NOPERM */ ":550 Insufficient permission",
# /* 78 CONFIG */ " 554 Local configuration error",
-- Lars
---
Lars Kellogg-Stedman * lars(_at_)bu(_dot_)edu * (617)353-8277
Office of Information Technology, Boston University