On Tue, 2014-01-14 at 19:06 -0500, Brandon Applegate wrote: > Just saw this in a message tonight. No idea if this is a transient error > or not.
Got one too for AS197422 at "Tue, 14 Jan 2014 23:59:01 +0100", resent the mail at "Wed, 15 Jan 2014 00:03:12 +0100" and it worked so probably transient. Laurent host gmail-smtp-in.l.google.com[2a00:1450:400c:c05::1a] said: 550-5.7.1 [2a01:6600:80xxx] Our system has detected that this message 550-5.7.1 does not meet IPv6 sending guidelines regarding PTR records and 550-5.7.1 authentication. Please review 550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more 550 5.7.1 information. hg12si1854476wib.39 - gsmtp (in reply to end of DATA command) Arrival-Date: Tue, 14 Jan 2014 22:59:01 +0000 (UTC) Date: Tue, 14 Jan 2014 23:59:01 +0100 > --- > host gmail-smtp-in.l.google.com > [gmail-smtp-in.l.google.com][2607:f8b0:4002:c01::1a] > said: 550-5.7.1 [2607:ff70:11::11] Our system has detected that this > message does not 550-5.7.1 meet IPv6 sending guidelines regarding PTR > records and authentication 550-5.7.1 . Please review 550-5.7.1 > https://support.google.com/mail/?p=ipv6_authentication_error > [support.google.com] for more 550 > 5.7.1 information. t26si2290895yhl.255 - gsmtp (in reply to end of DATA > command) > --- > That URL's relevant section says: > > Additional guidelines for IPv6 > > The sending IP must have a PTR record (i.e., a reverse DNS of the sending > IP) and it should match the IP obtained via the forward DNS resolution of > the hostname specified in the PTR record. Otherwise, mail will be marked > as spam or possibly rejected. > > The sending domain should pass either SPF check or DKIM check. Otherwise, > mail might be marked as spam. > --- > > I have both of these (PTR's RR has matching AAAA, and I have SPF (but not > DKIM)). > > I'm guessing that something on google's side is misinterpreting some data > or other busted logic. I meet all the requirements laid out, and have > been sending mail to gmail addresses (via ipv6) since $forever. > > Off-list replies are fine to minimize noise, and if there is an answer or > any meaningful correlation I will reply on-list. Thanks in advance for > any info/feedback. > > -- > Brandon Applegate - CCIE 10273 > PGP Key fingerprint: > 830B 4802 1DD4 F4F9 63FE B966 C0A7 189E 9EC0 3A74 > "SH1-0151. This is the serial number, of our orbital gun."