Okay, so I have a tunnel broker account (and subnet) via sixxs. I use the SMTP proxy on the ASG, so if I want to receive inbound smtp mail via ipv6 (along with the standard ipv4), I assume I would create a PF rule allowing from any ipv6 to ipv6 address of my side of the tunnel broker subnet? Assuming yes, I'm not sure what the right DNS juju is. I already have a dynamically updated A record at dyndns.org called gateway.mydomain.com, and that works fine. I added an AAAA record called gateway.mydomain.com and the dyndns wizard took it okay. Looking at the domain record, there are now (as hoped) two records for gateway.mydomain.com - the A and AAAA records. Since there was already an MX record that said "10 gateway.mydomain.com", my understanding is that hosts that support ipv6 will try the ipv6 address, and fall back to ipv4 if the former fails. Does this all sound okay?
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