[time-nuts] 2 (Spoofing)

John Ackermann N8UR jra at febo.com
Wed Oct 5 12:09:27 UTC 2011

The mailing list system resends messages rather than just relaying them.  List messages won't show details of the originating sender path.


On Oct 4, 2011, at 9:51 PM, Chuck Harris <cfharris at erols.com> wrote:

> Hi John,
> I have looked at the "originating" IP's in the headers, and I find
> a curious thing:  They are all built and structured differently.  Those
> on the messages I send through time-nuts don't have my IP listed as
> originating... or listed at all.  The header information I find in the
> messages that come to me is generally showing the path from febo to my
> ISP...  febo is listed as the originating IP.
> I think the originating IP header in the spam mail from jeff was added
> there by the spammer... just like they generally add headers that try to
> tell you that the message is whitelisted, approved by spamassasin, and
> not spam, etc..
> -Chuck Harris
> John Ackermann N8UR wrote:
>> See my other message for more details, but the spammers often use a two-step
>> approach:  (1) harvest address lists from the web, from compromised machines,
>> etc., and (2) send those addresses, along with the payload, off to the botnets who
>> then send the actual email.  That gives legitimate-looking senders along with the
>> volume sending power of the botnet.
>> I think in the past things work as you suggested and probably often still do,
>> Chuck, but if you look at the originating IP on these messages they often are in
>> blocks assigned to countries unlikely to be the home of the victim.
>> John
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