----- Original Message -----
From: "Paul Shields" <paul@???>
To: "Exim Users List" <exim-users@???>
Sent: Saturday, May 07, 2005 11:18 PM
Subject: Re: [exim] 1st post - total novice ! - Config advice - Use of
rblsto block dynamic IPs but not block customers
> Hmm... regardless of how you implement this, maybe you should step back
and
> ask yourself why you want to bypass RBL lookups for clients that could be
> in these blacklists.
>
> Do you really want your clients that are in these blacklists to relay mail
> through you? IMHO it would be wiser to notify them via the DNSBL response
> that they are blacklisted somewhere (assuming you're not using the most
> radical of the DNSBL lists, which can sometimes arbitrarily blacklist
whole
> dialup/ISP ranges, but that's another story...).
I do use blacklists that block ALL dynamic IPs, so yes this is the case. It
cuts out 99% of viruses without wasting processing power on virus checking.
It also cuts out a vast majority of mail from zombied machines (which are
also normally on dynamic IPs).
In general my customers are home users & small businesses on standard
broadband connections (e.g. BT and Blueyawnder) or dialup, with dynamic IPs,
so if they are going to be able to send mail from their own domains I have
to allow it.
All the best
Phil
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