Spam evolved from nuisance ads into phishing and malware vectors. Modern defenses rely on layered filters, authentication standards (SPF, DKIM, DMARC), sandboxing, and machine learning to reduce risk and keep inboxes usable.
Microsoft's modern antispam and email security (EOP, Defender for Office 365) use layered detection - reputation, ML, sandboxing, and URL checks - to block malware and phishing. Pair these services with user habits like not opening unknown mail and enabling MFA.
Spam control combines technical filters, authentication standards, policies, and user training to reduce unwanted email, phishing, and malware risk in organizations.