Before emailing... Is yours a Frequently Asked Question? Unfortunately I now get so much mail that I can't promise to respond to every one. I know this seems obnoxious, but I notice I have mails in my inbox that are two years old. I'm probably never going to respond to them, and I may as well admit it. I respond faster to emails that are short. Two-liners I often reply to immediately. Long emails I leave in my inbox to deal with later, and never do. My email address is my first and last initial at Y Combinator.