Emails from scanner with user's email address as a sender are going to Junk

Hi there,

I have several scanners with the same config, which send emails to Exchange server. Scanners are configured to send emails with a user as a Sender and a Receiver. The problem is that from one particular scanner emails are detected as Junk. Obviously users can't add their own email addresses to Whitelist. From other scanners all good. Any idea where can be the problem?

Thanks!

Artem