[thelist] http://njabl.org/ ??

[Ken Schaefer]

They are testing to see whether your mail server is an open relay. There are
a number of message formats (mostly malformed) that some mailservers will
deliver anyway, even though they shouldn't. What you are seeing is an
example of such a mail format.

Most Open Relay testers will give a list of all the different types of
malformed address types they use.

Cheers
Ken

----- Original Message ----- 
From: "Michael Pemberton" <mpember at phreaker.net>
To: <thelist at lists.evolt.org>
Sent: Monday, September 29, 2003 9:28 AM
Subject: Re: [thelist] http://njabl.org/ ??


: John C Bullas <jcbullas at nildram.co.uk> wrote:
:
: > At 10:55 28/09/2003, you wrote
: > >Has anyone else been receiving emails from these guys?  They claim:
: > >
: > >----- start quote from original -----
: > >This is an automated test message for the purpose of finding and
: > >adding open relays to our dnsbl.  If you have any questions, see
: > >http://njabl.org/
: > >-----  end quote from original  -----
: > >
: > >Sounds a bit suspect?
: >
: > if it is legitimate open relay testing they are looking for their own
: > messages to be sent out the other side of your mail server
: >
: > check the destination address
: >
: > if it does you get blacklisted ;) or they use you for spamming?
: >
: > FB
: >
:
: The address seems to be formulated in a mangled fashion.
:
: something at theirdomain@mydomain
:
: If they were really testing for sending mail, this seems a bit strange.
Why
: not use the real address instead of appending my domain to the end?
:
: Has anyone else out there seen this format for email addresses?  The only
time
: I have seen this is at work where we have an old VAX system for internal
mail
: and need to append @net to the end of en external address.