gmail.com - 550 error for ipv6/PTR ?
laurent at guerby.net
Wed Jan 15 07:09:01 UTC 2014
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
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
550-5.7.1 authentication. Please review 550-5.7.1
5.7.1 information. hg12si1854476wib.39 - gsmtp (in reply to end of
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
> 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
> [support.google.com] for more 550
> 5.7.1 information. t26si2290895yhl.255 - gsmtp (in reply to end of DATA
> 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
> 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."
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