Your message is being received by the person you are trying to talk to but it doesn’t hit the mark. They are reading what you are sending but it’s not the right message at the right time. Do more research and write more specifically to this person. Or, use the phone. I prefer the phone (after doing all of the research) because it is more effective and easier to communicate.
Creating a cold email based on attributes you find on-line is imperative. Investing time performing research on the person you want to meet is evident in the message you write. If it is meaningful, your chances of getting a response are much greater.