Open Trashmail is described as 'Open Source standalone trashmail solution that ships its own mail server' and is an app in the Online Services category. There are more than 50 alternatives to Open Trashmail for a variety of platforms, including Online / Web-based, Windows, Linux, iPhone and Firefox. The best alternative is MailDrop, which is both free and Open Source. Other great apps like Open Trashmail are Spamgourmet (Free, Open Source), 10 Minute Mail (Free), Burner Mail (Freemium) and Mailinator (Freemium).
Inboxkitten is an open-source disposable email service that you can freely deploy adopt on your own! Use any inbox to avoid spam Use inboxkitten when you don't want to get spammed by revealing your real email address. Email Auto-Deletes
Simple free disposable email address service, unlimited free disposable email addresses. Create a new e-mail address whenever you need one. Maintain complete control over active addresses. Forwards all mail to your existing e-mail address. Never receive unwanted e-mail again.
Learn to Protect your Internet Identity. Single-use email address is a generated email address that is used only once when signing up for a service. It makes impossible for attackers to predict which email address was used for which service.
Hushmail is a commercial email service focusing on security with features such as industry-standard OpenPGP encryption and two-step verification. All communications also use a secure SSL/TLS connection.
Moakt is a temporary mail that expires after an hour from the time it is created. Before expiring, you can use the email and receive emails as if they arrived to your inbox. In this one hour, the email you created is yours and no one will be able to use it but you.