When an ordinary email becomes a serious threat

Your business may be more exposed than you think.

One convincing email can lead to payment fraud, stolen data, operational downtime and substantial financial losses.

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Some of the most damaging attacks look like everyday business messages.

POSSIBLE FRAUD Illustration of a fraudulent email requesting updated bank details on a business laptop

A last-minute change of bank details can look like a routine supplier email.

The problem

It’s not just spam.

Business email threats don’t always arrive as obvious viruses. They may look like an overdue invoice, a message from the CEO, an updated supplier bank account or a shared document.

They arrive in the middle of a normal workday, when people are focused on getting things done. That’s when one mistake can become an expensive incident.

Everyday business risks

Threats that can hide in an ordinary inbox

You don’t have to be careless to be deceived. Sometimes all it takes is a message that appears credible.

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Payments sent to the wrong account

A fake supplier email announces new bank details. Your team processes the invoice, but the money reaches a fraudster.

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Stolen passwords and access

A realistic sign-in or document-sharing request sends an employee to a fake page designed to collect credentials.

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Dangerous attachments

An invoice, purchase order or résumé appears familiar while concealing a malicious file or a deceptive request.

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Impersonated executives and colleagues

A message that appears to come from leadership demands an urgent, confidential transfer outside normal approval steps.

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Disrupted operations

A single harmful interaction may lead to compromised devices, inaccessible files or interruptions to critical work.

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Urgency and pressure

“Do this now.” “Keep it confidential.” “Don’t call.” Social pressure encourages people to act before verifying.

When something goes wrong

When the warning signs are missed, the damage is real.

An email incident rarely stays inside the inbox. It can affect finances, customer relationships, private data and days of business operations.

Direct financial loss

Business interruption

Theft of company information

Damaged customer relationships

Reputational harm

Recovery time and costs

Unauthorized data disclosure

Pressure on employees and teams

Know the signs

Eight red flags you shouldn’t ignore

Always verify unusual requests using a trusted, independent channel — even when the sender appears familiar.

A supplier changes bank details by email

An urgent payment request

A sender address that’s almost correct

An unexpected attachment to open immediately

A request for passwords or verification codes

An unusual tone from a colleague or supplier

A message demanding secrecy

A link to an unfamiliar sign-in page

The risk isn’t always visible.
By the time it becomes obvious, it may be too late.

Many costly incidents begin with a routine-looking message. HT-GUARDIAN is a Hightech initiative focused on the business risks that arrive through email.

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HT-GUARDIAN · Hightech S.a.s.

How exposed is your business to email fraud?

Tell us about the messages your team handles and the risks that concern you. We’ll speak plainly, without unnecessary technical jargon.

No-obligation commercial inquiry. No security product can eliminate every risk.

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