[Greylist-users] relay identification
franck at nenie.org
Fri Jan 9 04:41:27 PST 2004
> Because my machine does SPF checking, it can distinguish
> emails forged to be from aol from real emails from aol,
But it can also catch real users who use aol return
addresses but do not send through AOL (e.g. using their
ISP or work smarthost). That's one half of the SPF
adoption problem: teach legitimate users the new rules,
the other half is that it's of rather limited use if it's
not universally applied (spammers can check too and
fake only non-SPF domains); and technically, overloading
the text record is ugly and lazy, why couldn't they
get a RR number allocated?
> and it rejects the former without sending a bounce
> message to the unfortunate joe-jobbed aol user in
> the envelope from.
If you do all your bouncing through SMTP failure
replies this should not happen anyway.
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