Mailinator - Any Inbox. Any Time.
Harakirimail - Harakirimail is a free disposable email service. Just send email to anythingyouwant@harakirimail.
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.
Protect IID - Protect your privacy with single-use email addresses
MailDrop - maildrop is a Mail delivery agent used by the Courier Mail Server. The maildrop MDA also includes filtering functionality. maildrop receives mail via stdin and delivers in both Maildir and mbox formats.
Shitmail - Tired of receiving spam in your mailbox? This only happened because you inserted someday your email address on some shitty sites.