i am using microsoft exchange 2010
recent issue i am facing when sending mail to gmail it comes up with the error
mx.google.com gave this error:
[2002:7566:8b9::7566:8b9 16] The sender does not meet basic ipv6 sending guidelines of authentication and rdns resolution of sending ip. Please review https://support.google.com/mail/answer/81126for more information. k18si7127613wiw.4 - gsmtp
the error is only with gmail any email on gmail or email hosted on gmail
kindly help me