Yesterday I finished up a task which I began some weeks ago and which has been helpful in lowering the numbers of emails coming to my inbox. For a variety of reasons, I have been receiving newsletters, announcements, etc from sites I have visited, and recently I decided to do something about it.
First of all, I now never request that I be sent any kind of newsletter or notice; that cuts down a lot of mail. Second, I UNSUBSCRIBED from all of the unwanted newsletter type emails that were in my inbox. I sat down and went through all the unwanted newsletters and notices and simply dedicated some time to get it all done.
Newsletters all must have (or at least DO have) a link which will unsubscribe you. You have to scroll down to the bottom of the page and search, but if you check all of the links there, one of them will be to Unsubscribe.
Some sites make it very easy to unsubscribe. You click the link and are then taken to a page that says, "You have now been unsubscribed." Other sites require that you type in the email address to be unsubscribed. They almost always give you a chance to change your mind and continue getting their mailings.
I am not completely free of newsletter mailings, but a huge bulk of the unwanted emails has been eliminated from my inbox and what is left are the personal emails.
I will do this constantly whenever I receive a commercial email or newsletter. Since I began unsubscribing several weeks ago, my inbox has been a lot lighter and cleaner.