[AusNOG] FW: IPv6 reverse DNS and Mail ...

[Beeson, Ayden]

Whoops, forgot the list.

Thanks,
Ayden Beeson


-----Original Message-----
From: Beeson, Ayden
Sent: Monday, 20 May 2013 2:39 PM
To: 'Paul Brooks'
Subject: RE: [AusNOG] IPv6 reverse DNS and Mail ...

On paper and to spec yes, I guess the problem is that people don't realise that :)

It's actually a really good point, I hadn't given much thought to it, I haven't activated any client subnets yet here but now when I do I'll be giving this a LOT of thought.

Thanks,
Ayden Beeson


-----Original Message-----
From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Paul Brooks
Sent: Monday, 20 May 2013 2:27 PM
To: ausnog at lists.ausnog.net
Subject: Re: [AusNOG] IPv6 reverse DNS and Mail ...

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.
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