[AusNOG] IPv6 reverse DNS and Mail ...

[Paul Brooks]

On 20/05/2013 2:06 PM, Scott Howard wrote:
> How many of these are from people that are actually aware that they are actually
> using IPv6 for email?
>
> I've seen this countless time where people enabled IPv6 on their local network, and
> their mail server automatically started attempting to use it for delivery.  At least
> one major appliance vendor also has this problem - as soon as it found an IPv6
> router being advertised, it would attempt to deliver all mail over IPv6 to any host
> with an AAAA address - all sourced from it's auto-configured address with no reverse
> DNS...
Which is how IPv6 is supposed to work, no?

P.