I've encountered this strange situation where a user of mine is using a CRM and email sent from that CRM to my user are going into his spam folder constantly. My user has already added emails to the safe senders list but it isn't working. We properly set up SPF + DKIM records for the CRM and I looked at DMARC alignment and all emails from that domain passed. So it really is a mystery.
Furthermore the thing that makes this tricky is that the email itself is sent as though it's coming from the users contact, as opposed to coming from the CRM itself. How would you go about ensuring the reliable delivery of this emails like these?
I don't see any of the emails in the Office 365 exchange admin