If you do almost everything electronically and you don't want a pile of junk to toss you can ask the post office to put your mail on hold and they will not deliver to you any more.
They will hold on to regular mail for pick up but if you have very little to begin with it might go unnoticed.
“It is possible that she stopped her mail.”
Don’t know if it is the same all over the country, but our local post office will only hold mail for thirty days. We are almost never at our home in Tennessee so my better half’s father picks up our mail every thirty days then renews the hold.