Re: [exim] reverse dns check

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Lähettäjä: Peter Bowyer
Päiväys:  
Vastaanottaja: exim users
Aihe: Re: [exim] reverse dns check
On 30/04/2009, Terry ( 1stKMH ) <terry@???> wrote:
> Ive been using this
>
>
> deny    message = inconsistent or no DNS reverse entry for
> $sender_host_address
>         !sender_domains =
> /usr/local/etc/exim/whitelisted-domains
>         !authenticated = *
>         condition = ${if eq{$host_lookup_failed}{1} {1}{0}}

>
> which I picked up off the list and its been working well for dropping
> lots of spam but ive also had the odd false positive like this one
>
> 2009-04-30 14:26:20 [4717] H=(clearview01.clearviewdns.net)
> [69.56.235.170]:2835 I=[94.76.221.176]:25 F=<nic@???>
> rejected RCPT <alf@???>: inconsistent or no DNS reverse entry
> for 69.56.235.170


Doesn't look falsely positive to me - 69.56.235.170 resolves to
ns1.clearviewdns.net, which in turn resolves to 69.56.235.171.
Inconsistent RDNS makes the host lookup fail.

Peter
--
Peter Bowyer
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