I keep getting this error message from my MTA (Exim4) when i try to send mail form my mail server to a gmail account (the error message is from gmail servers):
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=IPv6AuthError for more informat
If you click the support link, the web page says that I need a PTRv6 record that points my mail server to an PTRv6 record. How do I add an PTRv6 record to my domain?