Mailing List SIMS@mail.stalker.com Message #6100
From: Richard Johnson <rdump@river.com>
Subject: Re: Open Relay Testing
Date: Tue, 30 May 2000 18:38:06 -0600
To: SIMS Discussions <SIMS@mail.stalker.com>
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At 15:40 -0600 on 5/30/00, Andrew R. Schmiechen wrote:
> Does anyone have a link for a service which tests mail servers for open
> relays?  I know a number have been mentioned in the past.  I thought that
> abuse.net had such a service, but I can't seem to find it on their web
> site.
>
> -A.


I believe abuse.net's relay test service was abused so frequently John Levine
turned it off.  Likewise for the original MAPS test service.

You can telnet to mail-abuse.org from the machine you wish to have tested,
and MAPS will test your host for you.  You can use NiftyTelnet, NCSA Telnet,
or whatever from your Mac for the trigger.

Below is a dump of the telnet session to mail-abuse.org [204.152.184.74] from
one of my sendmail hosts, here referred to as testhost.example.com
[192.168.1.128].  If you want, you can write your own MacPerl script that
runs the same tests. :-)

| Connecting to 192.168.1.128 for anonymous test ...
| <<< 220 testhost.example.com ESMTP Sendmail 8.9.3/8.9.3; Tue, 30 May 2000
| 18:30:01 -0600 (MDT)
| >>> HELO mail-abuse.org
| <<< 250 testhost.example.com Hello dante.mail-abuse.org [204.152.184.35],
| pleased to meet you Relay test 1
| >>> MAIL FROM:<nobody@mail-abuse.org>
| <<< 250 <nobody@mail-abuse.org>... Sender ok
| >>> RCPT TO:<nobody@mail-abuse.org>
| <<< 550 <nobody@mail-abuse.org>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 2
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<nobody@mail-abuse.org@mail-abuse.org>
| <<< 550 <nobody@mail-abuse.org@mail-abuse.org>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 3
| >>> MAIL FROM:<>
| <<< 250 <>... Sender ok
| >>> RCPT TO:<nobody@mail-abuse.org>
| <<< 550 <nobody@mail-abuse.org>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 4
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<nobody%mail-abuse.org@testhost.example.com>
| <<< 550 <nobody%mail-abuse.org@testhost.example.com>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 5
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<nobody%mail-abuse.org@testhost.example.com>
| <<< 550 <nobody%mail-abuse.org@testhost.example.com>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 6
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<"nobody@mail-abuse.org">
| <<< 550 <"nobody@mail-abuse.org">... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 7
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<"nobody%mail-abuse.org">
| <<< 550 <"nobody%mail-abuse.org">... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 8
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<nobody@mail-abuse.org@testhost.example.com>
| <<< 550 <nobody@mail-abuse.org@testhost.example.com>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 9
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<"nobody@mail-abuse.org"@testhost.example.com>
| <<< 550 <"nobody@mail-abuse.org"@testhost.example.com>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 10
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<nobody@mail-abuse.org@testhost.example.com>
| <<< 550 <nobody@mail-abuse.org@testhost.example.com>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 11
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<@testhost.example.com:nobody@mail-abuse.org>
| <<< 550 <@testhost.example.com:nobody@mail-abuse.org>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 12
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RCPT TO:<testhost.example.com:nobody@mail-abuse.org>
| <<< 550 <testhost.example.com:nobody@mail-abuse.org>... Relaying denied
| >>> RSET
| <<< 250 Reset state
| Relay test 13
| >>> MAIL FROM:<nobody@mail-abuse.org@>
| <<< 501 <nobody@mail-abuse.org@>... Sender domain must exist
| >>> HELO mail-abuse.org
| <<< 220 testhost.example.com ESMTP Sendmail 8.9.3/8.9.3; Tue, 30 May 2000
| 18:30:34 -0600 (MDT)
| >>> MAIL FROM:<nobody@mail-abuse.org@>
| <<< 250 testhost.example.com Hello dante.mail-abuse.org [204.152.184.35],
| pleased to meet you
| >>> RCPT TO:<nobody@mail-abuse.org@>
| <<< 501 <nobody@mail-abuse.org@>... Sender domain must exist
| >>> RSET
| <<< 503 Need MAIL before RCPT
| Relay test 14
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 Reset state
| >>> RCPT TO:<mail-abuse.org!nobody>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RSET
| <<< 550 <mail-abuse.org!nobody>... User unknown
| Relay test 15
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 Reset state
| >>> RCPT TO:<mail-abuse.org!nobody@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RSET
| <<< 550 <mail-abuse.org!nobody@testhost.example.com>... User unknown
| Relay test 16
| >>> MAIL FROM:<nobody@mail-abuse.org@testhost.example.com>
| <<< 250 Reset state
| >>> RCPT TO:<mail-abuse.org!nobody@testhost.example.com>
| <<< 250 <nobody@mail-abuse.org@testhost.example.com>... Sender ok
| >>> RSET
| <<< 550 <mail-abuse.org!nobody@testhost.example.com>... User unknown
| System appeared to reject relay attempts
| Connection closed by foreign host.


Richard

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