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Exchange to Gmail Problem

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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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