NAME

       auth-relaytest - attempt to use authenticated SMTP to relay to a DSBL-compliant host

SYNOPSIS

       auth-relaytest [-tv] ntlm <ip address[:port]>
       auth-relaytest [-tv] (cram-md5|login) <username> <password> <ip address[:port]>

DESCRIPTION

       auth-relaytest  attempts  to  connect  to the specified <ip address> on the specified port
       (default is port 25) and tries to use the  supplied  authentication  data  to  relay  mail
       through the host.

       auth-relaytest  uses the sender_user, sender_domain, target_user, target_domain, and auth-
       message parameters from dsbl.conf(5) by default. If  the  auth-message  parameter  is  not
       present, the message parameter is used instead.

       In  the  first  mode  of  operation  shown,  auth-relaytest attempts to authenticate using
       anonymous  NTLM  authentication.  A  well-known  bug  in  certain  Microsoft  SMTP  server
       implementations                                (described                               at
       http://www.microsoft.com/technet/security/bulletin/MS02-011.asp) will allow  relaying  for
       any client that authenticates in this way.

       In  the second form of operation, auth-relaytest attempts to authenticate using either the
       cram-md5 or login variant of SMTP AUTH, using the supplied username and password.

OPTIONS

       -t     Test mode. Instead of using the  target_domain  parameter  from  dsbl.conf(5),  the
              test_target_domain  parameter  is  used  instead. This is useful for sending a test
              message to yourself, perhaps to check that the  server  is  actually  relaying  the
              messages.

       -v     Verbose mode. Details of the SMTP transaction are written to standard output.

AUTHORS

       Paul Howarth <paul@city-fan.org>
       Ian Gulliver <ian@penguinhosting.net>

SEE ALSO

       dsbl.conf(5), spamtrap(1), relaytest(1)

                                            2004-01-06                          auth-relaytest(1)