IPv6 issues with Google

mbohn412 used Ask the Experts™
I keep getting undeliverable messages on emails sent to addresses that use Google.  The message tells me this:

mx.google.com #550-5.7.1 [My IPv6 address is here so I removed it] Our system has detected that this 550-5.7.1 message does not meet IPv6 sending guidelines regarding PTR records 550-5.7.1 and authentication. Please review 550-5.7.1 https://support.google.com/mail/?p=ipv6_authentication_error for more 550 5.7.1 information. v83si4687475qhv.85 - gsmtp ##

I have tried multiple things to fix this issue.  We use Comcast, and they tell me they do not have the ability to turn off IPv6 on the modem, and that I need to turn it off on my local machines.  That has been done already, with the exception of my server because I am running Exchange and that requires IPv6.  Comcast tells me that they cannot set up RDNS on the IPv6 address because they do not have a static IP for IPv6.  

Has anyone else who is experiencing this issue found a fix for it?  


Michael Bohn
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There are some general rule for exchange, which affects most of the providers....
- The IP address must not be dynamic.
- The IP address must have a PTR (reverse DNS) record.

I you cannot fulfill these conditions, the chance to deliver malls is bad. Most of the providers block such mail for IP4 and looks like also for IP6 as they switch to IP6

If remember dependencies with exchange and IP6 only to exchange 2007 In earlier versions. I use now exchange 2010 with only IP4 and as I know there is no relation to IP6 with 2013.  So exchange should not be the problem. But possibly the provider, if he tunnels IP4 to IP6 and you do not have your own one.

If this doesn't work, there is no way around as to use a smathost (mail-relay) which fulfills the condition). Or change the provider.

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