On Fri, 10 Nov 2000, Statux wrote:
> Just about any part of the headers (right down to the machine IP
> address) can be spoofed/forged on any machine where the email has passed
> through. The SMTP protocol lays out the whole thing about the headers, I
> believe:) but unless it's a widescale problem or just a problem on the
> last host the email went through, then it should be
> distinguishable. Sometimes (usually, even) just one entry in the headers
> isn't enough. You need to check over the whole route with a fine-toothed
> comb:P
>
Well, SpamCop is pretty good about knowing which SMTP
servers aren't trustworthy enough to record the IP address
of the originating machine. For example, some versionf
of the LOTUS smtp servers have known problems with the
"helo" command which can allow it to report a false IP
address.:-) Since this is WAY off topic and I certainly
don't want to help anyone forge headers, I'm not going to
get into that here.
Suffice it to say, if you want information on which
versions of which SMTP server software you can trust,
SpamCop newsgroups would be a GREAT place to start
asking... news://news2.spamcop.net is the URL.
John
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