[SpamCop-List] Re: Another form of unsolicited mail

[Paul Johnson]

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"WazoO" <nobody at devnull.spamcop.net> writes:

> It's called Challenge/Response ... There's a FAQ entry
> over in the web-Forums with some discussion on this
> concept ... do a search for "Mailblocks" for a bit of
> "lively" discussion. http://forum.spamcop.net/forums/index.php?

Or just google for "challenge response considered harmful" for a
summary with less drama...
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