[ipv6-ops] Re: mail filtering based on reverse DNS

[Matt Ryanczak]

On 8/12/11 3:45 AM, Bjørn Mork wrote:
> I'd love to see the matching forward for v6host.ipv6.6connect.net.  But
> I fear it will exceed mailing list size limits somewhat...
>
> Unfortunately, the reverse pointer is rather useless without it.

It does save a whois lookup and afaik no tools support inline whois 
lookups. Granted a PTR can say anything but as a professional courtesy 
to other netops people such wildcards are somewhat useful.