Mail Server Can't send to gmail (only Gmail)

Status: 5.0.0
Remote-MTA: dns;
Diagnostic-Code: smtp; 550-5.7.1 The IP you’re using to send mail is not
550-5.7.1 authorized to send email directly to our servers. Please use the SMTP
550-5.7.1 relay at your service provider instead. For more information, go to
550 5.7.1 'The IP you're using to send email is not authorized...' - Gmail Help 17-20020a630c51000000s9fsi610012pgm.818 - gsmtp

outlook, m365 can receive normally

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