Author: Marc Perkel Date: To: Ian Eiloart CC: Exim Users List, Phil \(Medway Hosting\) Subject: Re: [exim] Greylisting - using Exim new features - ratelimit with
noupdate
Ian Eiloart wrote: > --On 9 July 2007 20:31:01 +0100 "Phil (Medway Hosting)"
> <phil@???> wrote:
>
>
>> My point
>> being that if this method became the norm, then it would not be long
>> before spammers wrote their software to work properly.
>>
>
> Which is a valid critique of *any* anti-spam measure. It's an arms race
> we're in, and if there's a measure that buys us a few months dominance,
> then it's worth implementing. Perhaps it'll even have the side effect of
> causing other MTA authors to fix buggy products, which would be no bad
> thing.
>
>
Speaking of buggy MTAs QMail is really bizzare. If it sees a 4xx error
on the lowest numbered MX it assumes that all your servers will return
4xx and won't retry. It will only retry on a higher numbered MX if the
lowest has the port closed. And they think that's a feature.
