I have been trying to contact investors and angels for over 2 weeks now, more of them than I can count. So far, not even one of them even responded to me.
How I contact them is rather to the point, and inviting to contact me for more details. But they're rude enough to not respond at all.
Are there any specific ways to email them?
They are a little rude, but mostly busy. You need to go to events they might be or to events that you will meet other people that might know them. This is the critical part of networking. Before that, though, you need a well done elevator pitch and a thick skin. If you are already discouraged by two weeks of no response, then you need thicker skin.
You are coming from a place of 'scarcity'. Build, create something of value and service to others and soon they will come to you.
How many emails from strangers asking for money do you answer? Michael's correct, a connection is essential. You may be able to do that with email. It would be easier to perhaps learn what's important to them, be a part of making that better, join groups and forums and charities on which they participate and show you care about them before you ask them to care about you.
I've found that unless you already have an established relationship, or you're Richard Branson (and even then most people wouldn't believe it to be true anyway) email is like spitting in the wind when you're trying to reach people in a position to help you out. They simply do not respond. And if they do it will be a "template" rejection answer. You have a much better chance of actually reaching them by "calling" or showing up at their office." Although then you have to be good at the "cold call" thing because they'll look at you like you're an alien when you arrive. Now, if you can get an introduction from one of their friends, you have a chance. You need an agent. Good Luck! Varun, I'm always rooting for the underdogs (I'm one of them....lol).
The people you mention get hundreds of emails a month, if not more, and you need a 'warm' personal intro to get them to respond....