[AusNOG] IPv6 reverse DNS and Mail ...

Joshua D'Alton joshua at railgun.com.au
Mon May 20 16:48:02 EST 2013


Aye although then you're stuck in "why am I getting so much spam" land.
Usual IT problem, balancing various (usually completely irrational)
policies.


On Mon, May 20, 2013 at 4:28 PM, Reuben Farrelly <reuben-ausnog at reub.net>wrote:

> On 20/05/2013 4:05 PM, Beeson, Ayden wrote:
>
>> Agreed, following the leader whether their view is wrong or right
>> doesn’t help.
>>
>> And dropping china’s mail till they fix it actually sounds pretty good
>> to me, nothing will get things fixed quick like it not working at all J
>>
>> If its legitimate and they want it, they will fix it.
>>
>
> That's fine until your local resident sales person comes to you and wants
> an explanation as to why a PO that is being sent from China or organisation
> X, hasn't yet come through.
>
> "They don't have a PTR record" isn't an explanation that will cut it to
> non IT people, generally, and after the blank look has subsided you'll be
> invited to make it work by the business owner/manager who stands to lose
> out on the sale due to that email not coming through, because of such
> policy.  That's not an argument that IT people will usually win.
>
> IMHO the lack of reverse PTR should be at best just an "indicator" of a
> potential spam source.  There are plenty of dynamic IPs which have reverse
> PTR's, and some legitimate mail which comes from IP's that don't have
> reverse PTR's at all.  Enough inconsistency out there to not want to apply
> a blanket blacklist rule to this criteria alone.
>
> Technology exists to support business operation, not the other way around.
>
> [And for the record, I do believe in setting up reverse PTR records, but I
> also know that in the real world not everyone else gets that, or has the
> ability to have it changed, so why penalise them?].
>
> Reuben
>
>
>
>
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