businesswoman working on laptop computer at home with warning window on screen. blocking spam e-mail, warning pop-up for phishing

address alert attack browsing caution chat communicate connection contemporary crime cyberspace delivery email feedback global hack hacker internet junk laptop letter mail mailbox mailing marketing media message monitor network networking newsletter office online protect protection receive safety security social software threat typing update virus warning window wireless word businesswoman working computer home screen blocking spam e-mail pop-up phishing concept