PreInbox is described as 'Email address for Web Apps. A whitelist-only mailbox. All unsolicited emails get blocked' and is an app in the security & privacy category. There are more than 50 alternatives to PreInbox for a variety of platforms, including Web-based, Google Chrome, Mozilla Firefox, SaaS and Android apps. The best PreInbox alternative is addy.io, which is both free and Open Source. Other great apps like PreInbox are MailDrop, Firefox Relay, Guerrilla Mail and Mailinator.
CatchMailNot is a email proxy and privacy service which helps you take control of your digital identity. Make up unlimited email addresses on the fly, receive emails and reply to them without having to give out your real email address.
Poistaa is a free service that allows automatically discarding your emails for instant. Emails will be received and deleted automatically.
