Depends who and why it was sent. An example would be if the email was related to your job. For me, meeting notices and training requirements are sent by email, it is my obligation to read the emails and comply, it is part of my job. My employer pays for me to have email, I have to use it. If it is your home email, that is different. You can pick and choose as you please, you can even block sender's email from even reaching your computer.