How many times has this happened to you? You visit a Web site but registration is required, with a valid email address needed for confirmation. But maybe it’s just a message board you want to read one time only, or a store you have no interest in shopping from again and from which you don’t want to be saddled with a lifetime of spam. And you can’t use a made-up email address because you have to confirm a link or send back a reply. Well here’s a brain-dead simple solution to the problem: 10 Minute Mail, which provides, for free, exactly what is promised in the name: An email address that vanishes after 10 minutes. There’s no registration, no verification. Just click over to the site and hit “Get my 10 Minute Mail email address.” You’ll instantly be given an address that ceases to exist after 10 minutes.