Just go to www.unroll.me and you can EASILY unsubscribe from hundreds of mailing lists that you never want to see again.
You simply put your e-mail address and password and they will scan your inbox. They found 197 subscriptions for me in a couple minutes.
All I had to do was check which ones I wanted to unsubscribe from.
As for the subscriptions you’d still like to receive? Unroll.me bundles them ALL into ONE daily e-mail. SO GOOD!
My oldest e-mail account was inundated with subscriptions I didn’t care for. They are now removed and the inbox is back to the way things were back when it was a fresh account. It’s almost eery.