Our first inbound email via IPv6 (was spam!)

Tue Jun 5 16:06:54 UTC 2012

On 6/5/2012 7:42 AM, Seth Mos wrote:
> Op 5-6-2012 16:10, Livingood, Jason schreef:
>> In preparation for the World IPv6 Launch, inbound (SMTP) email to the
>> comcast.net domain was IPv6-enabled today, June 5, 2012, at 9:34 UTC.
>> Roughly one minute later, at 9:35:30 UTC we received our first
>>   inbound email over IPv6 from 2001:4ba0:fff4:1c::2. That first bit 
>> of mail
>> was spam, and was caught by our Cloudmark messaging anti-abuse platform
>> (the sender attempted a range of standard spam tactics in subsequent
>> connections).
>>
>> In the past several hours we have of course seen other messages from a
>> range of hosts, many of which were legitimate email  so it wasn't just
>> spam! ;-)
>>
>> Since the Internet is of course more than just the web, we encourage
>> others to start making non-HTTP services available via IPv6 as well.
>
> I always wondered why (ISPs) never started with rolling out IPv6 email 
> servers first, the fallback from 6 to 4 is transparent and invisible 
> to the end user at a delay of a maximum of 30 seconds.

My email will come in via IPv6 as soon as Postini has IPv6 inbound and 
outbound. As far as I can tell, they still have neither, despite 
requests going back to 2009.

Matthew Kaufman