Sent mail returned to the sender

All of my sent to popular mail services are getting failed and returned with the message below.

" This is the mail system at host mail.codexivesolutions. 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

: host gmail-smtp-in.l.google.com[142.251.10.26]
said: 550-5.7.1 [106.201.232.60] 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. Learn more at 550
5.7.1 'The IP you're using to send email is not authorized...' - Gmail Help
c8si22843513pgc.66 - gsmtp (in reply to end of DATA command) "

Anyone can help in this ??

The link in your error clearly explain what can be the possible reason → 'The IP you're using to send email is not authorized...' - Gmail Help

Who is your hosting provider? or where did your purchase your server from ?