Re: [exim] 1st post - total novice ! - Config advice - Use o…

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Author: Paul Shields
Date:  
To: Exim Users List
Subject: Re: [exim] 1st post - total novice ! - Config advice - Use of rbls toblock dynamic IPs but not block customers
--On 07 May 2005 17:21 +0100 "Phil \\(Medway Hosting\\)"
<phil@???> wrote:

>
> ----- Original Message -----
> From: "Paul Shields" <paul@???>
> To: "Exim Users List" <exim-users@???>
> Sent: Saturday, May 07, 2005 4:58 PM
> Subject: Re: [exim] 1st post - total novice ! - Config advice - Use of
> rbls to block dynamic IPs but not block customers
>
>
>> I would expect that you can configure your RBL ACL to only do lookups
> based
>> on whether the sender address is in (or not in) some set variable - e.g.
>>
>> deny  hosts = !+dialup_ips
>>       message blah blah blah
>>       dnslists = sbl-xbl.spamhaus.org : list.dsbl.org (etc)

>>
>>
>>
>> dialup_ips would be defined as your dialup address range.
>
> Ah! But they could be connecting from anywhere though and not from a
> specific range.
>
>> Untested, but it should work. As this is your first day looking at an
>> Exim configure file I would suggest some careful reading...;)
>
> Uhuh. Ho Hum !!!
>
> Phil


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...).


Paul