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. Jason Livingood Comcast