On Mon, 27 Nov 2006, Matthew Elvey wrote:
Please read the whole email before responding.
This is a request for a particular kind of feedback from experts/regulars on
the issue of spam blowback (i.e. Joe-jobs/backscatter due to forged MAIL
FROM's) from Sieve-based systems. There's some relevant work going on on
ietf-mta-filters(_at_)imc(_dot_)org(_dot_)
...
It's not be possible to identify some such backscatter. If you get
backscatter that says, " Your message was automatically rejected by Sieve, a
mail
filtering language.", or is "From: Mail Sieve Subsystem
<postmaster[at]somedomain.dom>", it's coming from a Sieve-based system, and
that's what I want to hear about. (Though if it's not there, that does NOT
mean its wasn't from such a system.)
...
I looked through a few hundred thousand messages here and found none of
that form. Is this perhaps a sign that current users of Sieve are carefull
not to use it in situations where it might generate a DNS to a forged
address, and that if a true early reject feature were available, Sieve
might have much wider applicability and more users?
Daniel Feenberg
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