iRedMail version : 1.6.2
Downloaded installer
Ubuntu 22.04.2
MySQL
Nginx
No  iRedAdmin-Pro
Error Message :
This is the mail system at host mx.antaria.tk.

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

<************@gmail.com>: host
    gmail-smtp-in.l.google.com[2a00:1450:400c:c09::1b] said: 550-5.7.1
    [2a01:cb1d:83af:a400:a00:27ff:fec1:6741] Our system has detected that
    550-5.7.1 this message does not meet IPv6 sending guidelines regarding PTR
    550-5.7.1 records and authentication. Please review 550-5.7.1
    support google com/mail/?p=IPv6AuthError for more information 550
    5.7.1 . a1-20020adfdd01000000b002c56258d081si2881726wrm.274 - gsmtp (in
    reply to end of DATA command)
Reporting-MTA: dns; mx.antaria.tk
X-Postfix-Queue-ID: 4PYrVd5Dkxz2DNF
X-Postfix-Sender: rfc822; xen141@mail.antaria.tk
Arrival-Date: Sat, 11 Mar 2023 18:07:37 +0000 (UTC)

Final-Recipient: rfc822; ************@gmail.com
Original-Recipient: rfc822;************@gmail.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.1 [2a01:cb1d:83af:a400:a00:27ff:fec1:6741] Our
    system has detected that 550-5.7.1 this message does not meet IPv6 sending
    guidelines regarding PTR 550-5.7.1 records and authentication. Please
    review 550-5.7.1  support google com/mail/?p=IPv6AuthError for more
    information 550 5.7.1 . a1-20020adfdd01000000b002c56258d081si2881726wrm.274
    - gsmtp

You can help me please.
Thanks