Re: [Asrg] Please critique my anti-spam system

[Seth Breidbart <sethb at panix.com>]

> for a sufficiently large ISP (think AOL, or a cable modem business),
> keeping track of the tuples of <sender, recipient> for any length of time
> will require a _substantial_ database infrastructure.
>
> i was going to do some back-of-envelope computations on sizing, but
> this is your proposal, mitch, so why don't you do them and share the
> results with us.

Under 1K of data.  Remembering stuff is doing it the hard way.  Create
the lhs of the Message-ID signed with a private key that changes
daily.  If the "response" doesn't have one you could have generated
recently, it's bogus.

Seth

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