Spam emails can be blocked by creating inbox filters, reporting and blocking mail addresses, and using third party spam protection. In the worst case, junk mail is a common channel for malware and phishing attacks. BBC News reported an explosion of phishing attacks among web users in recent events, with over 18 million emails blocked on Gmail servers per day.
Avoid opening suspected junk mail, clicking on links within a questionable email, or responding in these situations. Doing so is the fastest way to become vulnerable to these types of attacks. Use antivirus software as an additional layer of protection to defend against viruses on your home network.