cannot send email to gmail

Undelivered Mail Returned to Sender
host aspmx.l.google.com[2607:f8b0:4003:c10::1b]
said: 550-5.7.1 [2600:3c00::f03c:91ff] 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 information 550
5.7.1 . m3si122272oia.134 - gsmtp (in reply to end of DATA command)

What kind of settings am I missing in my DNS?

 

this is what I get then I do a (reverse) ip address at http://www.digwebinterface.com/
I get the following:
50.100.50.100.in-addr.arpa. 21599 IN PTR li562-50.members.linode.com.

also, do I need to setup an AAAA dns record?

 

I think need a PTR-record for my ipv6
do I need to add this in DNS Zones -> DNS ptr ?
can you add this feature permanently in ispconfig?

 

need to add support for How to Configure Reverse DNS for BIND in ispConfig

https://documentation.cpanel.net/display/CKB/How+to+Configure+Reverse+DNS+for+BIND+in+WHM

 

usually, you set the PTR at your hoster. You can also disable ipv6 in postfix (inet_protocols = ipv4) or use ipv4 instead of ipv4+ipv6 when you send mails to gmail: https://blog.schaal-24.de/mail/work...ils-an-google-ueber-ipv6-verschicken/?lang=en

 

what hostler? do you mean domain registrar? or on my server?
also how do I setup Reverse DNS in ispconfig?

 

the server-hoster. i think, that you did the same for the ipv4