If you want to send Anonymous emails, Send-Email is a free web service that will help you to send Anonymous email. Send-Email is very simply and easy to use no sign up is required for send email.
To get start, enter recipient’s email, type in your message and click on the “Send Message†button. Public computers are not safe then you can send email via Send-Email.
Always make sure you check where they have their server located. In the US and EU there is no such thing as anonymous email. If you are serious about it uses professional services like http://www.anonymousspeech.com or http://www.findnot.com