Sahil Tandon:
> OpenDNS will not blindly redirect DNS queries that look like DNSBL  
> requests.  Notice the difference:
> 
>     % dig @resolver1.opendns.com www.abcdefghijklmnop12345.com +short
>     208.69.32.132
>     % dig @resolver1.opendns.com 40.30.20.10.www.abcdefghijklmnop12345.com 
>   +short
>     %

Note, this still breaks lookups of rfc-ignorant.org and other sites
that blacklist domain names instead of IP addresses.

If you must run an MX host, use a real DNS server.

        Wietse

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