Microsoft 365 offers powerful collaboration and security tools but leaves gaps in areas like spam filtering, business email compromise, malicious spam, quarantine management, outbound policy enforcement, data leakage, and advanced archiving. While built-in protections can be sufficient at higher licensing tiers, many organizations face rising costs and limited visibility. Third-party secure email gateways provide stronger spam detection, targeted BEC protection, layered malware defense, granular policy enforcement, and robust reporting. By supplementing Microsoft 365 with external solutions, organizations can reduce licensing costs, improve compliance, future-proof archiving, and gain 360° protection for inbound, outbound, and internal email traffic.

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