Email Gateway Defense provides:
Critical multi-layer security and compliance for your Exchange 2016 and newer;
Effective protection against spam and phishing emails;
Threat detection and message blocking;
Full functionality free for 14 days.
Specify Email Gateway Defense as an inbound mail gateway so that Email Gateway Defense filters out spam and viruses, and then passes the mail on to your Exchange mail service.
Specify Email Gateway Defense as the outbound mail gateway so that Email Gateway Defense processes the mail by filtering out spam and viruses before final delivery.
Advanced Threat Protection protects against advanced malware, zero-day exploits, and targeted attacks not detected by the Email Gateway Defense virus scanning features.