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Re: How long will they keep this up?
From: Pete O'Hara (pete
guardiandigital.com)
Date: Mon Jun 02 2003 - 10:24:53 CDT
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Magnus Bäck wrote:
>On Sun, Jun 01, 2003 at 01:48:51AM +0200,
> Ralf Hildebrandt <Ralf.Hildebrandtcharite.de> wrote:
>
>
>
>>* Magnus B?ck <magnusdsek.lth.se>:
>>
>>
>>
>>>I do not recommend rejecting unknown client hosts with 550 as it'll give
>>>too many false positives (I've tried a couple of times, but had to give
>>>up after a few days). Of course, that depends on your type of business.
>>>
>>>
>>In that case he can't use it at all, since even with 450 the mail
>>won't come through.
>>
>>
>
>Sure, but with 450 there is a chance of discovery and whitelisting
>before the mail is abandoned and returned to the user.
>
>
>
Magnus,
Could you explain why 450 would allow whitelisting? Does 4XX not get
processed until after the RCPT TO: command?
Pete
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