Author: Ian A B Eiloart Date: To: Bruce Richardson, Exim users list Subject: Re: [Exim] Greylisting + multiple MX hosts -> multiple attempts
--On Tuesday, March 23, 2004 11:56 pm +0000 Bruce Richardson
<itsbruce@???> wrote:
> On Tue, Mar 23, 2004 at 12:01:10PM -0800, Tor Slettnes wrote:
>> Current spamware tools typically retry right away (without waiting) --
>
> If greylisting becomes widespread, how long do you think it will be
> before they change that. It isn't rocked science.
>
>> Spamware typically does NOT cache the mail for repeated attempts later
>> - doing so for thousands of recipient addresses puts too much of a
>> burden on the spamming machines.
>
>> Spammers care about getting their
>> message out to as many people as possible with as little resources as
>> possible - if they run into any low-scale problems, they ingore them
>> and move on.
>
> If greylisting becomes common, it stops being a low-scale problem and
> they deal with it. Shouldn't be hard.
Yes, but that is an argument that you could use against ANY anti-spam
proposal. Its a little like telling a medieval knight that body armour is
useless because one day someone will invent guns. This is an arms race - we
can't win or lose, we can only stay ahead or drop behind.
Sure, the systems become a little less efficient - but ONLY for new
senders.
