Sending emails to domains hosted by Google with IPV6


I have some troubles to send emails to domains hosted by Google with my IPV6 connection. For gmail users, I have set a rule to send via ipv4.
But it exist domains hosted by Google. How to fix the problem ?
For example, host[2a00:1450:400c:c00::1a] said: 550-5.7.1 [2001:bc8:344f:200::32] Our system has detected that this message does 550-5.7.1 not meet IPv6 sending guidelines regarding PTR records and 550-5.7.1 authentication. Please review 550-5.7.1 for more information 550 5.7.1 . a68si15272508wma.0 - gsmtp (in reply to end of DATA command)

Thanks for your tips,



According to the link present in your log, you don’t seem to have configured the reverse of your IPv6.

$ dig -x 2001:bc8:344f:200::32 |grep PTR

After fixing this, you not have any issues sending mail to google :slight_smile: