01
Proof should support the reason to write
A proof point is most useful after the message has established relevance. If the opener explains why the account is in a specific moment, the proof can show that the sender understands that kind of moment. Without that context, proof often reads like a brag inserted into a template.
- Signal: what is happening at the account.
- Implication: why that signal matters to the buyer.
- Proof: why the sender has a credible reason to comment on it.