[Novalug] Obvious SPAM
Richard Rognlie
rrognlie@gamerz.net
Mon Feb 4 09:46:33 EST 2008
On Mon, Feb 04, 2008 at 09:32:40AM -0500, Ed T. Toton III wrote:
> Yes, I'd treat it as normal spam.
>
> I'll second the recommendation for using SPF records in your domain name,
> if you can do so. It'll help cut down on this sort of thing, at least in
> terms of the return-path, or "envelope" from-field. Some mail systems may
> actually check the header from-field too. It depends on the
> implementation.
>
> My answer is you shouldn't be too concerned. This happens all the time,
> and any semi-intelligent spam filter or mail admin will know not to trust
> it. The header's from-field is just informational, and the spammers can
> put anything they want there.
>
> In terms of it being misinterpreted by other recipients who don't know
> anything about how mail and SMTP works, SPF is all you can do to try to
> curb that.
It's not "all you can do" You can also look at DomainKeys Identified Mail
(DKIM). I gave a presentation at the LUG a couple of months ago...
Slides can be found via here
http://www.novalug.com/node/110
Richard
--
/ \__ | Richard Rognlie / Sendmail Ninja / Gamerz.NET Lackey
\__/ \ | http://www.gamerz.net/~rrognlie <rrognlie at gamerz.net>
/ \__/ | Creator of pbmserv@gamerz.net
\__/ | Helping reduce world productivity since 1994
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