Email not delivery

[HostinganID]

Hi all, i'am newbie om server managemenet and directadmin.
Can someone help me? I'am already install directadmin on my server. When i want to send mail to google mail / yahoo mail. This did not sent. And i hava message :

Remote-MTA: dns; ASPMX.L.GOOGLE.com
Diagnostic-Code: smtp; 550-5.7.1 [2400:c980:0:2:453:aeff:fe01:1374] 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=ipv6_authentication_error for more
550 5.7.1 information. n46si3952722ota.80 - gsmtp

Can someone help me how to fix this ? I'am already add ptr on my ip adress.
My domain : hostingan.id

 

[Richard G]

Either disable ipv6 on your server and only use ipv4, or else you have to create a PTR record for your ipv6 address.
But in most cases this has to be done at the control panel of your hoster or datacenter where you rent the server (and the ip's).