Email Isn’t Secure File Sharing. It Just Looks Like It Is
For more than thirty years, email has been a trusted communication tool across business and government organisations. To this day, it remains one of the most widely used tools for sharing files.
It’s familiar, fast and already embedded in how teams work. The problem is, email was never designed to be a secure file sharing tool.
It was designed for easy communication. The fact that it can be used to send files has led to a long-standing assumption that it should be used to send them.
In today’s environment, that assumption is becoming increasingly difficult to justify.
Why email feels like it works.
There’s a reason email persists as a popular way to send information, regardless of risk. It’s easy to use, it doesn’t require new systems or training, and it fits naturally into existing daily workflows.
For teams under pressure, that matters.
From an operational perspective, email solves an immediate problem – delivering a file from one place to another, quickly. But that convenience masks a more fundamental issue. Email is not designed to provide control, visibility or accountability once a file has been sent. What actually happens after you hit send.
Once an email leaves your environment, both control and visibility are lost almost immediately.
Attachments can be forwarded without restriction. Files can be downloaded, copied or stored locally. Recipients can share them with others, intentionally or unintentionally. All without the sender knowing.
From the point of sending, there is typically no reliable way to:
- Track who has accessed the file
- Control how it is being used
- Revoke access once it has been shared
- Maintain a complete audit trail of activity
That’s where the real risk lies. Not at the point of sending, but in everything that happens afterwards.
The compliance gap
For organisations operating in regulated environments, convenience alone is no longer enough.
Handling sensitive information requires more than delivery. It requires control, accountability and alignment with security frameworks such as the ISM (ACSC ISM).
For government organisations, this is critical. Sensitive information is often handled at classifications such as PROTECTED, where maintaining control, accountability and compliance is not optional. Email was never designed to meet these expectations.
The risk is real.
It’s easy to assume that these limitations are manageable. After all, email has been used this way for years. But the data suggests otherwise.
The Office of the Australian Information Commissioner continues to report that human error, such as misdirected emails and unintended disclosures, is a leading cause of data breaches.
That means the biggest risk doesn’t come from sophisticated attacks, but from simple mistakes made in the course of everyday work.
Once a file has been sent, there is little anyone can do to control the impact. Therein lies the risk.
Why near enough is not good enough.
For a long time, email has been treated as a practical compromise. Its limitations were known, but accepted in exchange for speed and simplicity.
But with data volumes increasing, cross-organisational collaboration more frequent, and regulatory expectations rising, this position is becoming harder to maintain.
At the same time, the consequences of losing control over information are more visible and more significant. In this context, relying on a tool that was not designed for secure file sharing introduces unnecessary risk.
The solution isn’t just about technology, it’s behaviour.
Most organisations already understand the limitations of email. The reason it persists isn’t capability, it’s habit.
People default to what is familiar, especially under pressure. If a secure alternative is slower, more complex or harder to use, it will be bypassed.
A better approach without added complexity.
The most effective solutions are those that maintain the simplicity of email while addressing its limitations. They allow organisations to share information externally while retaining control, visibility and accountability.
Purpose-built platforms such as SigBox are designed specifically for secure file sharing in regulated environments, providing controlled sharing, visibility of activity and audit trails, while aligning with Australian government standards and supporting data sovereignty requirements
Importantly, Sigbox is designed to fit within existing workflows, so teams can adopt them without major disruption. This matters because one of the biggest barriers to improving file sharing practices is behaviour.
