Quoting Marc Sherman <msherman@???>:
> Tony Finch wrote:
>> On Tue, 22 Mar 2005, Ken Lowther wrote:
>>
>>
>>> http://www.alphaworks.ibm.com/tech/fairuce
>>
>> Challenge/response systems are a recipe for losing desirable email.
>
> Not to mention generating significant amounts of collateral spam, and
> annoying legitimate correspondents.
>
Mainly the point is, as the subject line indicates, a heads up. Also, some of
the checks done early on BEFORE the challange may merit some looking at.
Hermit