why IPv6 isn't ready for prime time, SMTP edition

Paul Ferguson fergdawgster at mykolab.com
Wed Mar 26 02:08:41 UTC 2014

Hash: SHA256

On 3/25/2014 7:03 PM, Robert L Mathews wrote:

> On 3/25/14, 6:24 PM, Brielle Bruns wrote:
>> The problem is, it blows my cred and rep with my end users when
>> on day one of getting them set up and fully running on IPv6, they
>> can't e-mail the local school district, or their business
>> partners, because the other end uses Google mail.  It makes me
>> look like an idiot, and they start questioning why should they
>> waste time/money on getting to be IPv6 ready.
> I don't quite see how this is anything to do with IPv6.
> If you set up an IPv4 mail server with no reverse DNS, your mail
> would be rejected by many servers, too. And there are certainly
> plenty of providers who won't let you configure the reverse DNS of
> an IPv4 address.
> Your provider assigned you an IP address with no reverse DNS, and
> you set up a mail server on that IP address. Most people would say
> that was unreliable even before knowing you're talking about IPv6
> instead of IPv4. <shrug>

Also, please do *not* expect folks to toss anti-spam measures out the
window just because they might move to v6.

That would be naive.

- - ferg

- -- 
Paul Ferguson
VP Threat Intelligence, IID
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