Re: [Asrg] Stamps

[Keith Moore <moore@cs.utk.edu>]

> On the other hand, I think the odds are low that a spammer can maintain a
> return address that actually functions long enough to reply to a
> significant number of whitelist confirmations. 

so this amounts to yet another heuristic for identifying possible spammers -
if they can't respond to a challenge, they're not stable enough to bother 
with.  not a perfectly reliable indication, but perhaps still useful?

Keith
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