I installed Mailcow on my server and configured it. There are no problems with other emails. https://www.mail-tester.com gives 10/10.

The problem is with Google mail. If I send email to Google mail, I get this message:

host gmail-smtp-in.l.google.com[142.250.150.26] said:
550-5.7.1 [185.97.200.51] The IP you’re using to send mail is not authorized to
550-5.7.1 send email directly to our servers. Please use the SMTP relay at your
550-5.7.1 service provider instead. For more information, go to
550 5.7.1 https://support.google.com/mail/?p=NotAuthorizedError 38308e7fff4ca-30041b158f7si25122551fa.276 – gsmtp
(in reply to end of DATA command)

When I send email from Google mail to mine, I get this message:

The recipient server did not accept our requests to connect. For more information, go to https://support.google.com/mail/answer/7720 [example.ru. IP: timed out] [mail.example.ru. IP: timed out]

There is a PTR record for the IP address, DNS is configured, DKIM and DMARK are there. Ports 25 and 587 are open and forwarded in the router.

I read on the Internet that this can happen if your IP is in https://www.spamhaus.org, but I deleted my IP from there.

Please, tell me how to make friends with Google mail.