Mailinator - Any Inbox. Any Time.
sup3rS3cretMes5age - A safe, simple tool for one-time (self-destructing) messages
TempMail.altmails - Disposable temporary email addresses
Harakirimail - Harakirimail is a free disposable email service. Just send email to anythingyouwant@harakirimail.
10 Minute Mail - Temporary disposable e-mail service to beat spam. Avoid spam with a free secure e-mail address.
Guerrilla Mail - Guerrilla Mail is a web-based app that provides a disposable and anonymous email address. Users of the service are not required to set up an account in order to send or receive emails.