Re: email address "spoofed"

[AgfTech Lists <lists () agftech com>]

On Fri, 2004-03-05 at 03:59, Tim Laureska wrote:
> I'm not sure if "spoofing" is the correct term but here is what has
> happened:

YOu may indeed call it spoofing!

> Someone is sending out email messages (with virus laden attachments)
> using our domain name  ... they are addressed as coming from
> support () ourdomainname com (ourdomainame would be our actual domain name)
> which is an email address that we never set up.
>
> My question is how is this done and is there anything we can do to
> prevent this in the future?  The message header looks like this:

How - You just need your own smtp service running on your system/server
and you may send out emails as anyone using some flags on the command
line...
For you to do - I don't think you can stop someone doing it from, as
they might be spoofing their IP too or could be doing so from another
country or whatever reason...
SPF is coming up as an answer to spoofing atleast and you may want to
look at http://spf.pobox.com
This is no way out and I would await any suggestions on this list for
what can we do to someone spoofing as our domain/email... 

Regards
Aman

> Received: from your-xhtr8hvc4p [68.55.1.207] by ourdomainname.com
>   (SMTPD32-8.05) id A3C8DF0118; Fri, 05 Mar 2004 04:09:28 -0500
> Date: Fri, 05 Mar 2004 04:07:07 -0500
> To: info () ourdomainname com
> Subject: E-mail account security warning.
> From: support () ourdomainname com
> Message-ID: <oruybbfoofisdsegtve () ourdomainname com>
> MIME-Version: 1.0
> Content-Type: multipart/mixed;
>         boundary="--------hggfurquvkrsejwodibt"
> X-RCPT-TO: <info () ourdomainname com>
> Status: U
> X-UIDL: 355598192
>
>
> Tim
>
>
>
>
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______________________
Aman Raheja
AGF Technologies
http://www.agftech.com
______________________


---------------------------------------------------------------------------
Ethical Hacking at the InfoSec Institute. Mention this ad and get $545 off 
any course! All of our class sizes are guaranteed to be 10 students or less 
to facilitate one-on-one interaction with one of our expert instructors. 
Attend a course taught by an expert instructor with years of in-the-field 
pen testing experience in our state of the art hacking lab. Master the skills 
of an Ethical Hacker to better assess the security of your organization. 
Visit us at: 
http://www.infosecinstitute.com/courses/ethical_hacking_training.html
----------------------------------------------------------------------------