Re: Our first inbound email via IPv6 (was spam!)

[Matthew Kaufman <matthew () matthew at>]

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