[Pkg-dspam-misc] Bug#401623: Confirmation
Daniel Kahn Gillmor
dkg-debian.org at fifthhorseman.net
Wed Dec 6 17:18:13 CET 2006
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At 2006-12-04 23:21, tsr-debian at achos.com said:
> When receiving mail with X-DSPAM headers already present,
> local dspam adds its own to the bottom.
I just confirmed this: dspam does not replace already-present X-DSPAM
headers on a functioning dspam 3.6.8 installation for me either.
> This could be used by spammers to trick people filtering on Result:
Yup. That's a problem. As a general principle, I'd suggest that it's
better to filter based on the presence of any non-Innocent results (as
opposed to the lack of an Innocent result), but the difference is a
subtle one, and your scenario is probably not uncommon.
> But it also prevents error learning as the provided signature
> is not found in the local database (and dspam quits on the
> first signature found). It's quite a problem for resent
> messages (mutt's bounce).
This is a good point, and a potentially serious problem for dspam.
> I see no reason to keep externally generated X-DSPAM headers,
> but would suggest to overwrite them with the local data.
I tend to agree that this is the right solution. Would someone with
more experience with MTAs care to weigh in on whether replacing
received headers is a legitimate thing to do?
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