Pick one: Convenience vs. Privacy & Security
Use your computer's firewall. That requires study, time, and testing.
Use your computer's hosts file - in order to block sources.
DO NOT click on links in e-mail messages.
Better yet, use your router's firewall AND turn on your router's "Threat Protection" to protect everybody in your household using wifi and your router. My router has "Safe Access" and "Threat Prevention," two different approaches to network security.
Safe Access is DNS- and IP-based. It uses integrated external databases (such as Google Safe Browsing) to identify domains and IP addresses associated with malware, phishing, botnets, command and control servers, social engineering, and other threats. Devices on the network that attempt connections to banned destinations are denied access.
Threat Prevention is signature-based and uses Deep Packet Inspection (DPI) to monitor incoming and outgoing traffic. Malicious packets are discovered in real-time and dropped automatically. You can enable it to alert you to Internet attacks and inappropriate user behaviors.
Safe Access and Threat Prevention do not conflict with each other. Both packages operate silently in the background.