From: Zack Tennant (ccie@tnan.net)
Date: Tue Apr 08 2008 - 18:31:45 ART
Oops.. meant to send this to the list....
Actually, this practice is called joe-jobbing and a lot of it can be
corrected with the use of SPF records. I'm talking with Paul now
about setting one up to hopefully reduce/eliminate this.
On Tue, Apr 8, 2008 at 5:26 PM, Guy Sherr <gsherr@gmail.com> wrote:
> This is not the work of a jackass spammer. The work is more likely
> the result of a bot-net doing the work of army for a jackass spammer.
> Secondarily, the spam is actually being "returned" to the sender, who
> presumably needs to change the address. I can think of a couple of
> tweaks to smtp (that is, the protocol) which would put an end to this
> practice, however, as it is now, there is no reasonable measurement
> for deciding whether to automatically determine whether the mail
> should be marked as spam.
>
> The question really breaks on a spoof mechanism. When the smtp server
> collects "your" return note, it should be given to you strictly
> because it is, by definition, a message you "demanded" so you could
> know whether your email got out.
>
> Tweaks? The protocol could allow for a 'dead' addressee at the near
> end (where this message is supposed to be coming from). If the
> sender's email address maps to a mail exchanger, and the mail
> exchanger's ip address is not the same as that of the machine
> returning your email, then the notice goes in the garbage.
>
> The problem is that means about 1,000,000,000 extra DNS lookups per day.
>
> --
> "I love deadlines. I love the whooshing noise they make as they go
> by." -- Douglas Adams (author of the Hitchhiker's Guide to the Galaxy)
>
>
>
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