Re: [exim] UCEPROTECT Blacklists and why callouts are abusiv…

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Author: David Saez Padros
Date:  
To: Andrew - Supernews
CC: exim users
Subject: Re: [exim] UCEPROTECT Blacklists and why callouts are abusive
Hi !!

> David> Does anyone have real statistics about that suposed resource
> David> abuse ?
>
> What sort of statistics do you want?
>
> In the best case (when there isn't a specific spammer actively forging
> just our domain) we see about 100 times as many abusive callouts (ones
> not in response to mail we sent) as legitimate/excusable callouts
> (ones caused by mail that actually came from us), and about 10% of our
> incoming SMTP connections are from blowback sources (callouts, C/R and
> bounce blowback - we can't reliably distinguish them).


so for this 10% you don't know how many bounces are callouts or real
bounces ? then how you know which are abusive and which not ?

> Having a whitelist for known _legitimate_ senders does not reduce in
> any way the number of _abusive_ callouts you do, by definition.


what you perceive as abusive callouts are protective in my point of view.

--
Best regards ...

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