Greetings all, Please see below. Our parent office is having trouble
sending to all gmail accounts. They all get rejected with the below
message. The strange part is, We don't have IPv6 enabled on the customers
exchange server. Nor on their router. Further more, The "From" address
below (The 2602:306 one) isn't even in our allocation space. But actually
in ATT AS7018's allocation. I'm not sure how google is seeing that as the
source address on this SMTP connection. The below email was sent from OWA.
Which explains the local fe80 IPv6 address. But still once again, Not the
2602:306 address in the SMTP response from google. Anyone have any insight?
Diagnostic information for administrators: [email protected]
mx.google.com #550-5.7.1 [2602:306:2554:63c9:91c2:5c8a:ae39:ed80] Our
system has detected that 550-5.7.1 this message does not meet IPv6 sending
guidelines regarding PTR 550-5.7.1 records and authentication. Please
review 550-5.7.1
https://support.google.com/mail/?p=ipv6_authentication_error for more 550
5.7.1 information. y19si303834ywd.40 - gsmtp ## Original message headers:
Received: from mail.redacted.com ([fe80::91c2:5c8a:ae39:ed80]) by
mail.redacted.com ([fe80::91c2:5c8a:ae39:ed80%13]) with mapi; Thu, 8 Oct
2015 10:01:50 -0400 From: Krisi <[email protected]> To:
"[email protected]" <[email protected]> Date: Thu, 8 Oct 2015 10:01:49
-0400 Subject: TEST Thread-Topic: TEST Thread-Index:
AQHRAdHgIYTSkNTvA0ip9Ycg6Q8Mrg== Message-ID:
<[email protected]>
Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach:
X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain;
charset="us-ascii" Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Nick Olsen
Network Operations (855) FLSPEED x106
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