While browsing internet today i have found a really good site which allows you to send fake emails to anyone you want. FakeSend site that lets you send free fake emails to anyone with an email address.

Fake Send
All you have to do is simply fill out the fields to have an email message delivered to the recipient specified. Your recipient will receive an anonymous e-mail message at the address you provide as well as see the message as sent-from the sender you input. Click send message and your anonymity is protected while we deliver your email message(s), keeping you anonymous!

This website is a perfect way to prank your friends, your boss, or anyone at all! There's no signup, no fees, nothing. Just free emailing. Sending fake emails is also makes a perfect April Fools joke, so be sure to come back then as well!