Re: [Asrg] New proposal for spam blocking: Greylisting

["Jon Kyme" <jrk@merseymail.com>]

> Please look it over and try to poke holes in it, but I've worked pretty
> hard
> to make it as bulletproof as possible.

You mention Exim and sender callback verification, it's probably
worth pointing out that this isn't default behaviour and the Exim docs
suggest that:
"This facility should be used with care, because it adds a lot of resource
usage to the cost of verifying an address."
Exim also provides a "callout_defer_ok" options to allow success in the
face of a temporary failure.


Whatever... any spam that *is* retried after the "block" is aged gets
through. Or have I got that wrong?








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