Our first inbound email via IPv6 (was spam!)

Jack Bates jbates at brightok.net
Fri Jul 13 16:46:04 UTC 2012

On 6/5/2012 9:29 AM, Raymond Dijkxhoorn wrote:
> Looking more closely... Is this still work in progress?
> comcast.net.            358     IN      MX      5 mx3.comcast.net.
> comcast.net.            358     IN      MX      10 mx1.comcast.net.
> comcast.net.            358     IN      MX      5 mx2.comcast.net.
> mx2.comcast.net.        6958    IN      A
> mx3.comcast.net.        358     IN      A
> mx1.comcast.net.        358     IN      AAAA 2001:558:fe14:70::22
> You are now only accepting IPv6 if all IPv4 fails?
> Or will AAAA records for mx2 and mx3 added later?

Actually, I've had a problem with my version of sendmail on solaris 
choosing mx1.comcast.net and then reporting host not found. I think this 
is an issue with address selection, despite the server not being setup 
for v6 (os/sendmail are set for v6 support, but no assignment). I can't 
think of another reason why it would bounce 800+ emails with 
relay=mx1.comcast.net but have 0 logs for mx2/mx3.


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