We have a user where once in a while he will be sending an email and it randomly sends out blank.
It shows up in his sent items as blank as well. It's as if something is removing his content after he sends it but when I look in both reflexion and O365 message trace it doesn't get flagged as outbound spam.
Our Stack is:
1. O365 with Exchange online no hybrid
2. Exclaimer Signatures
3. Reflexion Spam filtering