Re: [Exim] Yahoo and sender verification callout

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Author: Suresh Ramasubramanian
Date:  
To: exim-users@exim.org
Subject: Re: [Exim] Yahoo and sender verification callout
At 10:28 PM 5/22/2003 +0200, Marc Haber wrote:
>On Thu, 22 May 2003 06:46:11 +0530, Suresh Ramasubramanian
><linux@???> wrote:
> >Like, if somebody dictionary attacks you with forged email.com addresses in
> >the sender envelope, and you get busy doing several thousand callbacks to
> >our systems ...
>
>Is that worse than trying to deliver several thousand bounces half a
>minute later?


Yes, when the dictionary attacked domain happens to be on a mailhub and so
returns 250 Ok to everything.

We get to do double the work, that way ...

         srs