It appears that Philip Homburg <pch-ietf-8@xxxxxxxxxxxxxx> said: >I can deliver email to Gmail addresses using my ISP provided IPv6 prefix. And so can I via a HE tunnel. In his case if you follow the URL in the Gmail rejection message, the page says that his ISP told them not to accept mail from that range. The solution is either to stick to v4 or find another provider that supoorts mail over v6. The Spamhaus PBL listing is a hint, since it is specifically about network ranges which by policy don't send mail. Google makes their own decisions which in this case happen to be the same. R's, John
