Shadows in the Inbox – A Lesson in Email Security

Problem Statement

An employee received an email that appeared to be from a known contact. The name looked genuine, the attachment seemed harmless, and it slipped past the spam filter without warning.

In reality, the sender’s identity had been forged — a classic case of email spoofing — carrying a serious security risk. In reality, the email was a carefully crafted case of email spoofing. The sender’s identity had been faked to make the message appear legitimate, hiding the fact that it carried a potential security threat. Such attacks can lead to serious risks, including malware infections, data breaches, or unauthorized access to sensitive systems.

Our Approach

When the client reached out, our cybersecurity team moved fast:
Analyzed the email header to trace the true origin.
Reviewed the spam verdict and found it had bypassed quarantine checks.
Confirmed the email was spoofed and explained the risks to the client.
Recommended immediate preventive measures to avoid future incidents.

Tech Stack Used

  • Microsoft 365 Security & Compliance – for header and spam verdict analysis.
  • SPF, DKIM, DMARC Testing Tools – to identify domain protection gaps.
  • Threat Intelligence Feeds – to validate and flag suspicious senders.

Turning Point

The breakthrough came when we found the SFV:SKQ verdict — proof that the spoofed email had been released from quarantine and delivered. It was clear that basic spam filtering wasn’t enough, and advanced email security was needed urgently.

 Scope & Actions  Taken

Full mailbox and account audit for hidden threats. Removal of any malicious rules or unauthorised access. Employee awareness training on identifying spoofed emails. Implementation of enterprise-grade email security.

 Outcome

The threat was neutralised within the same day. The client’s email domain security was strengthened with SPF, DKIM, and DMARC enforcement. Advanced email security tools were deployed, and staff were trained to identify suspicious emails. Since then, no spoofing attempts have succeeded.

Customer Feedback

We believed our email systems were safe until  this incident. Alliance Pro helped us act fast, close the gaps, and secure our communication for the long term.  — CIO, Financial Services Firm.

 Key Takeaways

  • Email spoofing can easily bypass basic spam filters.
  • Advanced email security and domain authentication are breaches.
  • Fast action prevents bigger security breaches.
  • Employee awareness is a vital layer of defence.

Your Next Step

Don’t wait for a spoofed email to test your defenses. Call Alliance Pro today to secure your organization with advanced email security solutions.