Temporary email services are used when you need to sign up for a site which requires an email address, but you don’t want to give your real address in order to avoid spam.
BugMeNot Email - use when forced to register for a site often you’ll need to provide an email address to receive a ‘verification’ link. Emails are kept for a maximum of 24 hours. The system generates a pseudo-random email addresses.
Mailinator was created out of the frustration over spam. It solves the problem of handing your email out to just anyone. You’ve always got a new spam-free email address ready-and-waiting. Mailinator is meant to be used by people on a semi-regular basis when they simply “need” an email address right now. One that they know they won’t need later.