RE: Returned mail... am i relaying? aaugh!
Something that I recommend for anyone putting a mail server
on the 'net that's open to the public is to telnet to
'relay-test.mail-abuse.org' *FROM* the mail server. The
remote host will run a series of tests to see if your system
will openly relay for it.
Results from my mail server appear below (note that
'206.53.254.241' is my dialup IP address and that
'tnt-206-53-254-241.orl.blueriver.net' is its hostname
according to DNS):
[jeremy@MERCURY:pts/4:~]$ telnet relay-test.mail-abuse.org
Trying 204.152.187.123...
Connected to cygnus.mail-abuse.org.
Escape character is '^]'.
Connecting to 206.53.254.241 ...
<<< 220 mercury.main.gaddis.org ESMTP Exim 3.35 #1 Mon, 27 Jan 2003
16:07:28 -0500
>>> HELO cygnus.mail-abuse.org
<<< 250 mercury.main.gaddis.org Hello cygnus.mail-abuse.org
[204.152.187.123]
:Relay test: #Quote test
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <"nobody@mail-abuse.org">
<<< 501 <"nobody@mail-abuse.org">: recipient address must contain a
domain
>>> rset
<<< 250 Reset OK
:Relay test: #Test 1
>>> mail from: <nobody@mail-abuse.org>
<<< 250 <nobody@mail-abuse.org> is syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 2
>>> mail from: <spamtest@maps1.pa.vix.com>
<<< 250 <spamtest@maps1.pa.vix.com> is syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #test 3
>>> mail from: <spamtest@localhost>
<<< 250 <spamtest@localhost> is syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 4
>>> mail from: <spamtest>
<<< 501 <spamtest>: sender address must contain a domain
>>> rset
<<< 250 Reset OK
:Relay test: #Test 5
>>> mail from: <>
<<< 250 <> is syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 6
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 7
>>> mail from: <spamtest@[206.53.254.241]>
<<< 250 <spamtest@[206.53.254.241]> is syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 8
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to:
<nobody%mail-abuse.org@tnt-206-53-254-241.orl.blueriver.net>
<<< 550 relaying to
<nobody%mail-abuse.org@tnt-206-53-254-241.orl.blueriver.net> prohibited
by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 9
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <nobody%mail-abuse.org@[206.53.254.241]>
<<< 550 relaying to <nobody%mail-abuse.org@[206.53.254.241]> prohibited
by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 10
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <"nobody@mail-abuse.org">
<<< 501 <"nobody@mail-abuse.org">: recipient address must contain a
domain
>>> rset
<<< 250 Reset OK
:Relay test: #Test 11
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <"nobody%mail-abuse.org">
<<< 501 <"nobody%mail-abuse.org">: recipient address must contain a
domain
>>> rset
<<< 250 Reset OK
:Relay test: #Test 12
>>> mail from: <spamtest@[206.53.254.241]>
<<< 250 <spamtest@[206.53.254.241]> is syntactically correct
>>> rcpt to:
<nobody@mail-abuse.org@tnt-206-53-254-241.orl.blueriver.net">
<<< 501 <nobody@mail-abuse.org@tnt-206-53-254-241.orl.blueriver.net">:
malformed address: @tnt-206-53-254-241.orl.bluerive may not<<< 501
<nobody@mail-abuse.org@tnt-206-53-254-241.orl.blueriver.net">: malformed
address: @tnt-206-53-254-241.orl.bluerive may not follow
<nobody@mail-abuse.org
>>> rset
<<< 250 Reset OK
:Relay test: #Test 13
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <"nobody@mail-abuse.org"@[206.53.254.241]>
<<< 550 relaying to <"nobody@mail-abuse.org"@[206.53.254.241]>
prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 14
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <nobody@mail-abuse.org@[206.53.254.241]>
<<< 501 <nobody@mail-abuse.org@[206.53.254.241]>: malformed address:
@[206.53.254.241]> may not follow <nobody@mail-abuse.org
>>> rset
<<< 250 Reset OK
:Relay test: #Test 15
>>> mail from: <spamtest@[206.53.254.241]>
<<< 250 <spamtest@[206.53.254.241]> is syntactically correct
>>> rcpt to:
<@tnt-206-53-254-241.orl.blueriver.net:nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 16
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <@[206.53.254.241]:nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #Test 17
>>> mail from: <spamtest@[206.53.254.241]>
<<< 250 <spamtest@[206.53.254.241]> is syntactically correct
>>> rcpt to: <mail-abuse.org!nobody>
<<< 501 <mail-abuse.org!nobody>: recipient address must contain a domain
>>> rset
<<< 250 Reset OK
:Relay test: #test 18
>>> mail from: <spamtest@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <spamtest@tnt-206-53-254-241.orl.blueriver.net> is syntactically
correct
>>> rcpt to: <mail-abuse.org!nobody@[206.53.254.241]>
<<< 550 relaying to <mail-abuse.org!nobody@[206.53.254.241]> prohibited
by administrator
>>> rset
<<< 250 Reset OK
:Relay test: #test 19
>>> mail from: <postmaster@tnt-206-53-254-241.orl.blueriver.net>
<<< 250 <postmaster@tnt-206-53-254-241.orl.blueriver.net> is
syntactically correct
>>> rcpt to: <nobody@mail-abuse.org>
<<< 550 relaying to <nobody@mail-abuse.org> prohibited by administrator
>>> rset
<<< 250 Reset OK
>>> QUIT
<<< 221 mercury.main.gaddis.org closing connection
Tested host banner: 220 mercury.main.gaddis.org ESMTP Exim 3.35 #1 Mon,
27 Jan 2003 16:07:28 -0500
System appeared to reject relay attempts
Connection closed by foreign host.
[jeremy@MERCURY:pts/4:~]$
j.
--
Jeremy L. Gaddis <jeremy@gaddis.org> <http://www.gaddis.org>
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