Ability to adjust email headers

Please add this, was just feeling the same way as everyone else here.

Please add this, this feels like a feature that needs to be added just simply due to the fact that gmail enforces it.

Impossible to prevent spam reports without being able to send one click unsubscribe headers. What are we supposed to do? Such a basic feature and year after year Front raises prices based on features added that we dont need or use. sad

Agreed on this being extremely useful. If we had a way where we could enrich drafts / emails created and sent via Front API with custom headers, we could more easily drive custom behaviors on replies to these messages and protect such header data from tampering (intentional or otherwise).