On Mon, 2004-03-08 at 13:10, Frank Murphy wrote:
> Came across this on another list. (below the line)
> Being the newbie, anyone want to look at this and see if he's on the ball,
This seems like a DIY challenge-response system.
>From the elrav1 author:
> No one has any problem at all getting through to me IF they use their actual
> return address, read that mail box, and are not sending bulk mail without
> asking me first.
Yes, but a lot of spam is sent with a false return address.
Challenge-response systems such as this will send the challenge to this
false address, which be yours or mine or ilug at linux.ie! These
challenge-response systems increase the amount of junk being sent.
Elrav1 seems not to be guilty of it, but many challenge-response systems
require you to visit a web page to make your response to the challenge.
Further, some of the web challenges require you to type in text from
obscured graphics (see http://www.captcha.net/) which assumes the
ability of the user's software to render graphics and the ability of the
user to see, so it excludes those with sight problems.
David
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