I can't send emails to Gmail accounts due to IPv6 PTR records configuration

when i try to send any email to Gmail account i receive this email from google titled

Undelivered Mail Returned to Sender
This is the mail system at host outletegy.com.

I’m sorry to have to inform you that your message could not
be delivered to one or more recipients. It’s attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

               The mail system

muhamed.oka@gmail.com: host
gmail-smtp-in.l.google.com[2a00:1450:4013:c02::1b] said: 550-5.7.1
[2a01:4f9:c010:82bf::1] 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
Prevent mail to Gmail users from being blocked or sent to spam - Gmail Help for more information 550
5.7.1 . fj1si12679963ejc.814 - gsmtp (in reply to end of DATA command)

i edited my reverse dns for server ip address but i don’t know what to do with ipv6

can anyone help I am a beginner … i am on the free plan

I know this is a few months old, but I ran into the same problem and found a simple solution here, which worked for me. You just go to list emails, select the domain, and you’ll see a message with the “Fix Now” option. Clicking that seems to have fixed the problems for me.