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Actually - that might be what one of my problems are. I'm trying to do a
lookup on the NS record if an IP and getting no NS record for some of
them. The lookup fials and puts it into DEFER.
What I need is a way to trap for this so that if there is not NS record
it returns an empty string.
Yes - what I'm doing isn't RFC2317 compliant. I'm just trying to extract
more information where it's available that can be used for spam detection.
David Woodhouse wrote:
>On Fri, 2003-12-19 at 12:29 -0800, Marc Perkel wrote:
>
>
>># Tag message with sender's IP nameserver record.
>># This can be processed with Spam Assassin
>># Does IP NS lookup (W.X.Y.Z) on Z.Y.X.in-addr.arpa and Z.Y.in-addr.arpa
>>
>>
>
>Breaks with classless reverse DNS delegation. See RFC2317.
>
>OOI is Exim going to successfully look up reverse DNS of the form
>
> Z.Y.X.W.in-addr.arpa IN CNAME Z.0/25.Y.X.W.in-addr.arpa
> Z.0/25.Y.X.W.in-addr.arpa IN PTR somehost.example.com.
>
>Would the default dns_check_names_pattern prohibit successful lookup of
>the CNAME target above, or is it not applied to interim results?
>
>
>
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