Sign up and pick a username, for example, "joesmith". Now, any email address ending with ...@joesmith.33mail.comwill be forwarded to you. The next time you visit a website that asks for your email address, instead of giving them your real email address, just make one up especially for them.

For example, if the website is tribble.com, you might give themtribble@joesmith.33mail.com. Don't worry, you don't need to do anything else, we'll create an alias automatically the first time they try to send you an email, and we'll forward any emails they send to you. You can even reply anonymously to any mails received through 33mail.