Microsoft 365 Solution
Email Security
Overview
Email is still the easiest way for attackers to reach your users, which is why getting the most out of Defender for Office 365 is so important. It gives you modern protection against phishing, malware, business email compromise, and malicious links or attachments, without relying on bolt-on tools or complex routing changes.
When we help organizations with email security, we look at how your mail flow is set up today, what protections you already have in place, and where users are most likely to make mistakes. From there, we configure policies such as Safe Links, Safe Attachments, impersonation protection, and anti-phishing rules in a way that fits your business and avoids unnecessary friction.
The goal is straightforward: reduce your exposure to email-based attacks, tighten authentication and sender validation, and give your security team clearer insight into what’s happening across your tenant—all while keeping the experience simple for your end users.
Methodology
At Nubrix Security, we take a structured and collaborative approach to every engagement. Whether we’re improving identity, securing endpoints, protecting data, or optimizing licensing, our goal is to deliver clarity, reduce complexity, and help you take measurable steps forward.
We follow a Crawl → Walk → Run model that adapts to your organization’s maturity, ensuring changes are adopted safely and without disruption.
Review existing mail flow, authentication, and current anti-spam/anti-phish settings
Validate DKIM, SPF, and DMARC posture and identify gaps
Enable core Defender for Office 365 protections in audit or monitor mode
Set up Safe Links and Safe Attachments in non-blocking configurations
Document key risks, user behaviors, and success criteria for the pilot phase
Apply anti-phishing, impersonation, and spoof intelligence policies to selected groups
Move Safe Links and Safe Attachments from audit into selective blocking based on pilot feedback
Review false positives and adjust rules, allow lists, and user notifications
Strengthen authentication by improving DMARC alignment and tightening external sender handling
Provide guidance and awareness messaging to pilot groups
Enforce phishing, malware, impersonation, Safe Links, and Safe Attachments policies tenant-wide
Implement consistent alerting, reporting, and escalation workflows
Integrate Defender for Office 365 with SIEM or ticketing for streamlined incident handling
Review and refine rules regularly to keep pace with evolving threats and organizational changes
Maintain ongoing hygiene, including domain monitoring, user risk reviews, and periodic policy tuning
Ready to strengthen your
Microsoft 365 Security?
Our team can help you plan, implement, and optimize your Microsoft cloud environment.