Sam,
Thanks for the clarification. Maybe my understand is limited, but I thought
these c/r solutions can look
at the headers of the emails to help validate where they are coming from not
just the return address?
I certainly don't want the solution to have more side-effects than the
problem we're trying to solve.
Appreciate your time.
Steve
On Tue, Jul 15, 2008 at 4:24 PM, Sam Varshavchik <[EMAIL PROTECTED]>
wrote:
> Steve Poe writes:
>
> « HTML content follows »
>>
>> Esa,
>>
>> I am researching for my boss/company. Obtaining the pros/cons
>> on all sides is what I need to do. Why do you feel its okay to pay
>> for others spam? What options/solutions do you have?
>>
>
> You missed the point: it's the advocates of all these cockamamie
> challenge-response proposals, they're the ones who believe everyone else
> should pay for their spam. Most spam carries a forged return address, and in
> most cases the return address is randomly picked from the same list that the
> spammers use for spamming, and belongs to a valid mailbox. Your challenges,
> therefore, will go to victims of spam forgeries. You will shift the cost for
> dealing with spam from you, to the spam forgery victim.
>
> Many spam blacklists consider an automated challenge-response mechanism to
> be mail abuse, and grounds for automatic blacklisting. Should you choose to
> implement it, some with a grudge against your company would then send you a
> bunch of junk carrying a forged return address of known spamtraps. Your dumb
> autoresponder then proceeds to forward the spam to the spamtrap, and your
> mail server gets blacklisted. Good luck trying to explain to your customers
> why their Internet provider no longer accepts mail from you.
>
> Just the fact that you see a bunch of scripts on the Internet for
> implementing challenge-response systems does not mean anything. You'll also
> see plenty of other stuff that's clearly of very little use to anyone. Just
> because it's available to download over the Internet speaks nothing of its
> usefulness, or sensibility.
>
>
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