The problem with this is it will delay all email, friend or foe, all the
time. Actual greylisting allows friends to send through to you
immediately after they have been recognized.
Timo Neuvonen wrote:
>> Here's a really simple solution to simple greylisting. Define 3 MX
>> records. Point the lowest and highest to dead IP addresses. Only the
>> middle one works. It will delay normal email about 30 seconds to one
>> minute when the MTA times out on the lowest MX. Requires no coding at all.
>>
>>
> May work technically, but some (few?) strict TLD domain registries require
> that MX records (at least for postmaster etc addresses) have to be fully
> functional. And they also run random tests on issued domains. Would result
> in a note "you have xx days to fix the system or your domain is subject to
> cancellation".
>
> Anyway, this would propably work nice with .com- .net- etc
> "no questions asked as long as someone pays" domains...
>
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<http://www.foreThought.net> Jawaid Bazyar
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Communications Simplified
