Hi All, Since we had a totally IPv6 network, I'd just like to point out the fosdem.org mail servers seem broken for accepting mail over ipv6. Only one server has a v6 address and is not listening on port 25 (the v4 address is), happened to notice looking at my mail server logs :) 2014-02-03 11:02:13 1WAHHx-00074w-9K episteme.fosdem.org [2a01:4f8:191:4332::28] Connection refused damian@Capricorn:~$ dig +short fosdem.org mx 20 episteme.fosdem.org. 10 apeiron.fosdem.org. damian@Capricorn:~$ dig +short episteme.fosdem.org ANY 85.10.228.28 2a01:4f8:191:4332::28 damian@Capricorn:~$ dig +short apeiron.fosdem.org ANY 82.146.116.115 IPv4 ok: damian@Capricorn:~$ telnet apeiron.fosdem.org 25 Trying 82.146.116.115... Connected to apeiron.fosdem.org. Escape character is '^]'. 220 apeiron.fosdem.org ESMTP Postfix ^]quit telnet> quit Connection closed. damian@Capricorn:~$ telnet episteme.fosdem.org 25 Trying 85.10.228.28... Connected to episteme.fosdem.org. Escape character is '^]'. 220 episteme.fosdem.org ESMTP Postfix ^]quit telnet> quit Connection closed. IPv6 not: web1-man:~# telnet episteme.fosdem.org 25 Trying 2a01:4f8:191:4332::28... Trying 85.10.228.28... Connected to episteme.fosdem.org. Escape character is '^]'. 220 episteme.fosdem.org ESMTP Postfix ^]quit telnet> quit Connection closed. (Fails over to v4) web1-man:~# telnet 2a01:4f8:191:4332::28 25 Trying 2a01:4f8:191:4332::28... telnet: Unable to connect to remote host: Connection refused :( Would be good to get this resolved so mail can be received over V6! Cheers - Damian