Unwanted Emails


Recently, I have noticed an unusual amount of unwanted Financial Investing EMails that I have not subscribed to.  When I unsubscribe to them, the next update brings a new slew of similar new EMails with new names.  How do I know that these are not related to Seeking Alpha contributors?

I am currently unsubscribing to them individually, and sending them to junk email folder, and blocking the sender.  However the next day get new one emails with different names. How can I get them to stop sending me these suspected bogus financial information permanently.