If you’re like most people, you probably don’t want to open junk mail. But if you have an iPhone, there’s a way to check it without even opening the envelope. To check junk mail on your iPhone, open the Mail app and tap the Junk Mail icon (it looks like a green trash can). The app will show you all of the junk mail that has arrived recently. You can tap any of the emails to open them in the app or just delete them without opening them. ..