Solved

Exchange to Gmail Problem

Posted on 2016-09-20
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Last Modified: 2016-09-22
Hello
When i try to send an email to gmail address from my Exchange Server i receive the rejected message with these details:

[2002:c063:e73a::c063:e73a] Our system has detected that this message does not meet IPv6 sending guidelines regarding PTR records and authentication. Please review https://support.google.com/mail/?p=IPv6AuthError for more information . g93si24123900qtd.124 - gsmtp

I tryed many solutions but the problem not solved
my spf tested :ok
i test the health with www.mail-tester.com and i received the score 9/10 so evrything it's OK
i disabled the IPv6 also not solved

can you please help me to resolve it !
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Question by:Mohamed Amine LIMAME
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Akhater earned 500 total points
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by:Squinky
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Well the absolute first thing that springs to mind is that you need a reverse DNS entry configured for that IP, and I can see that `2002:c063:e73a::c063:e73a` does not have one. You either need that in your own DNS with appropriate glue records, or set it via your ISP, which is usually the easier route as anyone worth using will have a UI for doing just that. That IP is registered to Hurricane Electric, so I'm guessing this is a 6 to 4 gateway. Solve that and I suspect you'll be on your way. Disabling IPv6 is just giving up rather than solving it!
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by:Akhater
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@squinky
The op is not using ip v6 Gmail is retrieving it from the email header which is showing the ip v6 of the nic on exchange
It is a known issue
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