[170313] in North American Network Operators' Group
Re: IPv6 isn't SMTP
daemon@ATHENA.MIT.EDU (Daniel Taylor)
Wed Mar 26 08:45:41 2014
Date: Wed, 26 Mar 2014 07:45:06 -0500
From: Daniel Taylor <dtaylor@vocalabs.com>
To: nanog@nanog.org
In-Reply-To: <20140326041858.7576.qmail@joyce.lan>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 03/25/2014 11:18 PM, John Levine wrote:
>> 3. Arguing about IPv6 in the context of requirements upon SMTP connections is playing that uncomfortable game with
>> one�s own combat boots. And not particularly productive.
> If you can figure out how to do effective spam filtering without
> looking at the IP addresses from which mail arrives, you will be in a
> position to make a whole lot of money.
>
> But, as always, I'm not holding my breath.
>
> R's,
> John
>
> PS: Note the word "effective".
>
You look at the IP, and verify forward and reverse DNS.
IPv6 doesn't make this any harder a problem than IPv4, it just means
that we're going to *have* to reject mail that comes in from IPv6
addresses that don't have clean DNS.
--
Daniel Taylor VP Operations Vocal Laboratories, Inc.
dtaylor@vocalabs.com http://www.vocalabs.com/ (612)235-5711
