Thomas Preissler: > Hello, > > I have now for some time Postfix listening on IPv6 on my server. > When I send for example emails to boun...@freenet6.net or > i...@test-ipv6.veznat.com I receive them via IPv6, all is good. > I also (very rarely though) receive "normal" emails via IPv6. So far so > good. > > Basically when more and more email servers got IPv6 enabled, I sometimes > saw > > Jun 14 19:20:02 dumbledor postfix/smtpd[1472]: NOQUEUE: reject: RCPT > from unknown[2002:XXXX:XXX::XXXX:XXX]: 554 5.7.1 Service unavailable; > Client host [2002:XXXX:XXX::4d49:4f1] blocked using bl.spamcop.net; > from=<XXXXXXXXXXXXXXXXXXXXXXXXXXXX> to=<tho...@preissler.co.uk> > proto=ESMTP helo=<XXXXXXXXXXXXXXXXXXXXXXXXX> > > Long story short: > * Some IPv6 addreses are DNSBL blocked, some or not. When they are > blocked, they stay blocked and same for when they are not blocked > (like the test IPv6 emailaddresses above). > * They always get blocked by the first DNSBL entry - obviously. > * Querying the DNSBL via their webinterface doesnt work for IPv6 > addresses, doing the same via the equivalent nslookup or dig command > gives me NXDOMAIN. > * No IPv6 firewall enabled, but I run a local only bind. > > Did anybody experience the same? > The odd thing is, and I cannot get my head around that, is that it works > for some, for others it never worked.
What is the IP address? What NSLOOKUP query did you use? Wietse