Seeing only important emails in inbox is almost a myth in this new era of advertising. You subscribe to mailing list once and it starts, never-ending emails and offers. Some people open secondary email for these kind of events, to have professional email free of clutter and junk, some just use one and the same email address. Let me introduce you to www.unroll.me, web app that helps to unsubscribe from mailing lists. It will be displayed in for of list as shown below.
recently, they have made an app that helps to manage the subscriptions even easier. The app scans your inbox for subscriptions, then gives the option to either unsubscribe or keep it, as well as with swipe up – consolidate them into a daily digest list called “Rollup”.