Re: [exim] Greylisting - using Exim new features - ratelimit…

Góra strony
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Autor: Marc Perkel
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Dla: Richard Clayton
CC: exim-users
Temat: Re: [exim] Greylisting - using Exim new features - ratelimit with noupdate


Richard Clayton wrote:
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> In message <46939896.20007@???>, Marc Perkel <marc@???>
> writes
>
>
>> What I also want to do is have several fake higher IPs that always
>> return defer but count as penalty events wiping out the good karma data
>> and making the IP start over.
>>
>
> So whenever there is a route flap you penalise everyone... ah well, it's
> your email, your decisions :(
>

Yes - for 5 minutes.

>
>> Good email will always try twice.
>>
>
> Except when it doesn't, but not worth labouring that again.
>

Except is actually does.
>
>> Spambots don't.
>>
>
> I now regularly see spambots showing up in logs with two connection
> attempts a little while apart -- I expect they figure that the worst
> that can happen is that two emails get delivered :) and it means that
> they don't need to save "state"
>

With this system the connections have to be in the right order. Lowest
numberd MX must be touched first.
>
>> So it passes 100% of
>> your good email and kills 90% of your spam.
>>
>
> Do you actually have data for this "100%" (or for that matter for the
> 90%) or are you just guessing that this is what it would be? I ask as
> someone who actually publishes data about email
>


I don't publish my data. However if I were losing email then people
would be screaming. The 90% is an estimate for what most people van
expect. My servers it's more like 99% but I'm a spam filtering company
and my customers tend to have more than an average amount of spam.

> They that can give up essential liberty to obtain a little temporary
> safety deserve neither liberty nor safety.         Benjamin Franklin

>
>
>


Something we agree on. :)