On 03/26/2014 08:05 AM, rw...@ropeguru.com wrote:
On Wed, 26 Mar 2014 07:45:06 -0500
Daniel Taylor <dtay...@vocalabs.com> wrote:
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.
dtay...@vocalabs.com http://www.vocalabs.com/ (612)235-5711
Actually, with all the discussion about ipv6 not having rDNS, in most
cases, would that not make things easier? So those that want to run
email servers SHOULD be on ISP's that allow for rDNS configuration for
IPv6. There should be some vetting in the process by the ISP, maybe,
before allowing this. So in essence, if you are a legitimate email
host, you will have rDNS configured on IPv6 for your server. Again, as
others have stated, rDNS should NOT be the only deciding factor in
whether or not an email is legit. No rDNS, or havinf rDNS, should have
some weight assigned to it for the overall evaluation of the sender.
Robert
If you can't get rDNS on a mail host from your ISP, I'd say you are on
the wrong ISP if you want to run your own mail server.
This goes for IPv6 and IPv4 equally.
--
Daniel Taylor VP Operations Vocal Laboratories, Inc.
dtay...@vocalabs.com http://www.vocalabs.com/ (612)235-5711
