Le Friday 22 August 2014 à 07:16 -0700, Lorenzo Colitti a écrit : > On Fri, Aug 22, 2014 at 12:56 AM, Laurent GUERBY <laur...@guerby.net> > wrote: > We've been running SMTP over IPv6 with postfix successfully > for over a > year and since 20140818 gmail.com IPv6 MX started to classify > most IPv6 > sourced emails sent from our machine to @gmail.com as spam. > The exact > same message sent using IPv4 within one minute of the IPv6 > bounce is > accepted. > > As there's no way to reach google mailops we had to remove > IPv6 from our > mail machines and go back to IPv4 only for mail, which is sad. > > > Are you following the "Additional guidelines for IPv6" section of > https://support.google.com/mail/answer/81126 ?
Hi, We have reverse and SPF in place so I believe we're following them: root@lists:~# dig +short TXT lists.tetaneutral.net "v=spf1 mx a ptr:lists.tetaneutral.net ip4:91.224.149.207 ip6:2a01:6600:8081:cf00::1 -all" root@lists:~# dig +short -x 2a01:6600:8081:cf00::1 lists.tetaneutral.net. (The AAAA for lists.tetaneutral.net is currently removed until the current issue with IPv6 is sorted out.) I did some statistics in the last few days since 20140818: IPv6: root@lists:~# grep gmail-smtp-in /var/log/mail.log|grep ::|grep status=sent|wc -l 236 root@lists:~# grep gmail-smtp-in /var/log/mail.log|grep ::|grep status=bounced|grep "message is likely unsolicited mail"|wc -l 29 IPv4: root@lists:~# grep gmail-smtp-in /var/log/mail.log|grep -v ::|grep status=sent|wc -l 564 root@lists:~# grep gmail-smtp-in /var/log/mail.log|grep -v ::|grep status=bounced|grep "message is likely unsolicited mail"|wc -l 0 We have another MX out host with similar statistics: about 10-15% of rejected mails as spam in IPv6 since 20140818 and exactly none in IPv4. For reference the same statistics on logs before 20140818: root@lists:~# grep gmail-smtp-in /var/log/mail.log-20140817|grep ::|grep status=sent|wc -l 1135 root@lists:~# grep gmail-smtp-in /var/log/mail.log-20140817|grep ::|grep status=bounced|grep "message is likely unsolicited mail"|wc -l 0 root@lists:~# grep gmail-smtp-in /var/log/mail.log-20140817|grep -v ::|grep status=sent|wc -l 778 root@lists:~# grep gmail-smtp-in /var/log/mail.log-20140817|grep -v ::|grep status=bounced|grep "message is likely unsolicited mail"|wc -l 0 Absolutely zero issue with IPv6 and it has been the case for more than a year until 20140818. Note: I changed the subject since it's not "nearly all IPv6 mail" sorry I did not take time to make some statistics in the first mail. Sincerely, Laurent
