After reading your comments it seems that you are mostly trying to get in touch with people interested in your project/idea. It's been a long time since I sent an email to a service to register or at least show interest.

Why not add a field to add my email info as most launchrock pages do? It would be a lot easier than copy/pasting your target email address to email you.

(EDIT: You might also want to use a dedicated email address for your project instead of one based on you HN tag, mainly because I want to remember why you are writing me back later if you do and your address should provide that which it does not)