[mailop] Comcast contact - IPv6 routing issue?

[Jay Hennigan via mailop]

Very small discussion list seeing bounces from Comcast. We are sending 
with IPv4 but bounce looks like an IPv6 network problem. Error message 
is as follows: (recipient usernames redacted). Can someone look into 
this or contact me offlist? Thanks!

Final-Recipient: rfc822; x...@comcast.net
Original-Recipient: rfc822;x...@comcast.net
Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; delivery temporarily suspended: connect to
    mx2h1.comcast.net[2001:558:fd02:243f::3]:25: Network is unreachable

Final-Recipient: rfc822; xxxxxxx...@comcast.net
Original-Recipient: rfc822;xxxxxxx...@comcast.net
Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; delivery temporarily suspended: connect to
    mx2h1.comcast.net[2001:558:fd02:243f::3]:25: Network is unreachable

Final-Recipient: rfc822; xxxxxxxx...@comcast.net
Original-Recipient: rfc822;xxxxxxxx...@comcast.net
Action: failed
Status: 4.4.1
Diagnostic-Code: X-Postfix; delivery temporarily suspended: connect to
    mx2h1.comcast.net[2001:558:fd02:243f::3]:25: Network is unreachable


--
Jay Hennigan - j...@west.net
Network Engineering - CCIE #7880
503 897-8550 - WB6RDV
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