Yes, unsubscribe from anything that you don't need.
It can be a free email newsletter or a paid magazine subscription. Subscribing to a plethora of stuff will make your life a mess.
Keep things simple.
I used to subscribe to any free thing that I could get on the internet. Repeat this over a span of few years and I was left with recurring junk in my inbox.
Finding the emails that really mattered became difficult every day. I had to delete so many emails every single day to keep my inbox clean.
Then one day enough was enough. I unsubscribed from all newsletters that I could find sitting in my inbox at that time. After that, I made it a habit.
Every time I see a promotional email that is no longer relevant to me, I hit unsubscribe. I actually went on to fill up a formal form to stop receiving promotional emails from my bank.
Clutter is directly proportional to stress. Clear the clutter, have less stress.