Getting to the next step
The point of the first email, the executive summary, and the pitch deck is to ultimately get funding for your startup. Each step leads to the next. The purpose of the first contact email is to be invited to send the executive summary. The purpose of the executive summary is to get the investor to want to see the pitch deck. The pitch deck is to persuade them to fund your startup. If they say ‘no’ at any of these stages, what do you do then?
You ask for feedback. Perhaps the material is unclear.