Author: Bruce Richardson Date: To: Exim users list Subject: Re: [Exim] Greylisting + multiple MX hosts -> multiple attempts
On Tue, Mar 23, 2004 at 02:06:47PM -0500, chris@??? wrote: > The three main reasons for the spam problem are that spam is cheap,
> easy, and profittable. Graylisting makes spamming more expensive
> and more difficult.
Much more difficult? Greylisting seems to assume that the programs
used by spammers never try to resend. If greylisting becomes at all
common, won't spammers simply adjust their programs to retry at least
once? At which point we would be back at square one, only with slightly
less efficient mail systems.
