Plesk - Mail landing in spam on microsoft / gmail

Hi I need someone who can tell me what is wrong with the plesk configuration. We are using the plesk server also as a mail server and for some reason the mails are landing in junk at microsoft ([login to view URL] / [login to view URL] / office365) & gmail.com. About the settings: - spf is set - dkim is set - dmarc is set - public ip is not on the blacklist - reverse dns is set Looking for a plesk specialist who can analyse the mail headers and find a solution for the problem. Kind regards Ivica