Email Security Services Beyond Microsoft 365.
DMARC. BEC Detection. Advanced Filtering.

A complete email security program from Gradius includes: DMARC/DKIM/SPF configuration implemented at reject or quarantine policy (not monitor-only); advanced email filtering layer beyond Microsoft 365 EOP using Mimecast, Proofpoint, or Graphus with AI-based threat analysis and independent threat intelligence; BEC and impersonation detection tuned to your organization's specific executive team and vendor relationships; time-of-click URL rewriting and link sandboxing; attachment sandboxing; policy-based email encryption for sensitive communications; and email archiving for organizations with retention compliance requirements (SEC/FINRA, HIPAA, legal). All deployed, configured for your organization, and continuously managed.

Microsoft 365's Exchange Online Protection (EOP) provides a meaningful baseline — it catches known malware, spam, and threats in Microsoft's threat intelligence database. What it doesn't provide: independent AI-based behavioral analysis that catches novel threats not in Microsoft's database; relationship intelligence that flags emails from senders your organization has never communicated with; DMARC enforcement (M365 doesn't configure DMARC for your domain — that's your DNS responsibility); and BEC detection that understands your specific organizational structure and communication patterns. Advanced email security solutions used by Gradius have measurably different catch rates for sophisticated phishing and BEC compared to EOP alone. The specific gap depends on the sophistication of the attacks targeting your industry — financial services, real estate, and professional services firms face more targeted BEC than industries that see primarily commodity phishing.

DMARC (Domain-based Message Authentication, Reporting, and Conformance) is the authentication protocol that prevents attackers from sending emails that appear to come from your domain. Without DMARC at a reject or quarantine policy, an attacker can send an email that says it's from yourcompany.com to your clients — requesting a wire transfer, updating payment instructions, or asking for sensitive information — and there's no technical barrier preventing that email from being delivered. This is the foundation of many BEC attacks: the spoofed email looks exactly like it came from the legitimate sender because it's using the legitimate domain name. DMARC at reject means those emails are blocked before they reach the recipient. For businesses in real estate, legal, financial services, or any field where clients trust emails from your domain with financial or sensitive decisions, DMARC at reject is not optional — it's the baseline that prevents your domain from being weaponized against your clients.

Gradius deploys and manages Mimecast, Proofpoint Essentials, and Graphus as primary advanced email security solutions, alongside other solutions appropriate to specific organizational environments. The selection depends on the organization's size, Microsoft 365 configuration, industry compliance requirements, and specific threat profile. Gradius is the management layer — we configure, tune, and continuously manage whichever solution is deployed for your organization, rather than prescribing one tool for every client regardless of fit. For organizations with existing email security solutions that aren't performing well, we also conduct email security assessments to identify why and what configuration changes or platform changes would improve outcomes.

DMARC/DKIM/SPF configuration is typically completed within one to two weeks — the DNS changes are straightforward once SPF and DKIM alignment is confirmed and the DMARC policy is set correctly. Advanced email filtering deployment (Mimecast, Proofpoint, or Graphus) typically requires one to two weeks for DNS routing changes, configuration, and initial tuning. BEC detection tuning requires two to four weeks of communication pattern analysis to configure organizational-specific rules accurately. Policy-based email encryption and archiving are typically deployed within one to two weeks. A complete email security program is operational within 30 days for most organizations, with BEC detection improving in accuracy over the first 60 days as tuning refines to organizational communication patterns.

No long-term lock-ins. We offer month-to-month and annual agreements. Email security is most effective as a continuously managed program — the threat landscape shifts, attack patterns evolve, and static configurations become less effective over time. Organizations stay with Gradius email security because phishing volumes decrease measurably, DMARC reports show the domain is protected, BEC detection catches impersonation attempts specific to their business, and email archiving satisfies compliance requirements without additional effort. We earn the renewal through performance.