What are the biggest threats to email systems today?

Phishing remains the dominant threat: credential theft, business email compromise (BEC), and brand impersonation cause substantial financial damage. Phishing sophistication increases continuously, targeting specific individuals and organizations.

Malware delivery via email persists despite filtering advances. Ransomware, trojans, and information stealers reach victims through attachments and malicious links. Attack techniques evolve to evade detection.

Account compromise threatens both individuals and organizations. Compromised email accounts enable further attacks, data theft, and fraud. Weak credentials, credential reuse, and phishing enable account takeover. Infrastructure compromise at ESPs affects millions of legitimate senders.