* Carlos E. R. <[EMAIL PROTECTED]> [07-13-07 16:46]:
> Last Tuesday I got a delay notice triggered by an email I sent to the list. 
> That's unimportant, but while looking at it I saw this header:
> 
> Received-SPF: none (Address does not pass the Sender Policy Framework)
>  SPF=HELO; sender=lists4.suse.de; remoteip=::ffff:195.135.221.135;
>  remotehost=lists4.suse.de; helo=lists4.suse.de; receiver=exa.billmerriam.com;
> 
> 
> I noticed the ipv6 address, and I was curious to check who it was:
> 
> [EMAIL PROTECTED]:~> host "::ffff:195.135.221.135"
> Host 7.8.d.d.7.8.3.c.f.f.f.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa 
> not found: 3(NXDOMAIN)
> 
> 
> Huh?
> 
> I then checked the ipv4 part:
> 
> [EMAIL PROTECTED]:~> host 195.135.221.135
> 135.221.135.195.in-addr.arpa domain name pointer lists4.suse.de.
> 
> 
> Clearly the address does exist. Now, who/what is to blame about the
> ipv6 counterpart? Guesses:
> 
>  - Linux's 'host' program is not yet ipv6 aware.
>  - Linux's 'named' daemon is not yet ipv6 aware, or not configured 
>    properly
>  - Ditto dns servers worldwide, or at suse, not yet ipv6 aware or not 
>    configured properly
>  - Human (ie, my) error.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

high probability  :^)

17:08 wahoo:~ > host ffff:195.135.221.135
ffff:195.135.221.135.wahoo.no-ip.org has address 65.185.141.84

17:09 wahoo:~ > host ::ffff:195.135.221.135
7.8.d.d.7.8.3.c.f.f.f.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa.wahoo.no-ip.org
 has no PTR record


have a good day  :^)

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