Messages in this thread | | | Date | Sat, 15 May 1999 17:55:00 -0700 (PDT) | From | George Bonser <> | Subject | Re: vger weirdness |
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On Sun, 16 May 1999, Matti Aarnio wrote:
> My opinnion about considering "X-UIDL:" as a sign of spam is that > the idea is misguided. All in all, an evolutionary view at the > spammers can show that for every *simple* countermeasure we use > against some simple signature characteristics, the spammers will > adapt fairly quickly. The only truly effective way to block the > spammers is to have message content analysing system which does > recognize spams out of non-spams.
Until now, I have never gotten a single message with an X-UIDL header that was not spam. The common spamming software that people use that adds a bunch of bogus headers also always adds an X-UIDL header for some reason. I suspect that this is because the authors know little about email and simply inspected the email that they downloaded from their ISP as an example of how to construct headers.
I have modified my filtering rules for kernel list mail to get around this particular check. BTW, I do not reject such mail, I simply freeze it until I can inspect it.
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