Want to send a private message over the web, but hesitate in case someone is spying? Privnote is a free service that requires no password or user registration.
Write your note, and you’ll receive a link. Copy and paste it into an email (or instant message) that you send to whomever you want to see the note. When they click the link, they see the note, and then it automatically deletes; meaning no one (even that same person) can read the note again. The link stops working.
You also have the option to be notified when your note is read.