Spoofing a From Address in SMTP Post: 302171307

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LEARN ABOUT DEBIAN

auth-relaytest

auth-relaytest(1)					      General Commands Manual						 auth-relaytest(1)

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 cer-
       tain Microsoft SMTP server implementations (described at http://www.microsoft.com/technet/security/bulletin/MS02-011.asp) will allow relay-
       ing 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)