On a 5209R box providing email connected to Insight/Spectrum cable ISP
I'm getting complaints of the following error:
The original message was received at Wed, 20 Dec 2017 09:37:36 -0500
from rrcs-96-11-138-58.central.biz.rr.com [96.11.xx.xx]
----- The following addresses had permanent fatal errors -----
<x...@oxxx.xxx>
(reason: 550-5.7.1 [2607:fcc8:bbc1:af00:a6bf:1ff:xxxx:xxx] Our system has
detected that)
----- Transcript of session follows -----
... while talking to aspmx.l.google.com.:
DATA
<<< 550-5.7.1 [2607:fcc8:bbc1:af00:a6bf:1ff:xxxx:xxx] 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=IPv6AuthError for more
information
<<< 550 5.7.1 . s15si3306798ith.152 - gsmtp
554 5.0.0 Service unavailable
A quick Google shows this may be a problem for at least the last two years:
http://forums.businesshelp.comcast.com/t5/IPV6/Google-mail-requires-IPv6-PTR-record-but-Comcast-does-not-supply/td-p/27056
Is this fix, disabling IPV6 in postfix, applicable to 5209R?
http://tanguy.ortolo.eu/blog/article109/google-ipv6-smtp-restrictions
Hope I can get this fixed some users are migrating to outside personal
accounts...
TIA! HoHoHo!
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