What Happens When Someone Sends Emails From Your Domain?
Many organisations assume that if their email systems are secure, their domain is protected. Unfortunately, that isn't always the case.
Cyber criminals can impersonate legitimate domains and send emails that appear to come from trusted organisations. To customers, suppliers and employees, these messages can look completely genuine, making them a powerful tool for fraud, phishing and impersonation attacks.
This type of attack is known as domain spoofing, and it can have serious consequences for businesses of all sizes.
What Is Domain Spoofing?
Domain spoofing occurs when a cyber criminal sends emails that appear to come from your organisation's domain, even though the messages were not sent by you. To the recipient, the email can look entirely legitimate.
Because people naturally trust familiar brands and email addresses, attackers often use spoofed emails to trick recipients into taking action without questioning the message's authenticity.
Fake Invoices and Payment Fraud
One common example involves attackers impersonating a business and sending fake invoices to customers. Since the message appears to come from a legitimate domain, recipients may believe it is genuine and act accordingly.
The consequences can be significant:
- Financial loss
- Damaged customer relationships
- Loss of trust in your organisation
Even if the attacker's primary target is your customer rather than your organisation directly, the damage to your reputation can be substantial.
CEO Fraud and Business Email Compromise
Another common tactic involves impersonating senior leaders within a business.
Attackers may send emails that appear to come from a company executive requesting:
- An urgent payment
- Sensitive information
- Changes to bank details
These attacks often rely on trust and urgency, encouraging recipients to act quickly before verifying the request. In many cases, a simple spoofed email can be enough to cause major financial or operational disruption.
Phishing Attacks Using Your Domain
Cyber criminals can also use spoofed domains to send malicious emails containing links or attachments. Recipients may unknowingly:
- Share login credentials
- Download malware
- Expose sensitive information
All while believing the email originated from your organisation.
This can affect customers, partners, suppliers and employees, extending the impact of an attack far beyond the initial email.
The Hidden Cost: Customer Trust
One of the most damaging effects of domain spoofing is the impact on reputation.
Even if your systems haven't been compromised, customers who receive suspicious emails claiming to be from your business may begin to question whether your communications can be trusted.
Trust takes years to build but only moments to damage. Once customers lose confidence in your communications, rebuilding that trust can be difficult.
Could Someone Be Spoofing Your Domain Today?
Many organisations have little or no visibility into who is sending emails on behalf of their domain. Without the right protections in place, attackers may attempt to impersonate the business without anyone realising it is happening.
This lack of visibility makes domain spoofing particularly dangerous. You may not discover a problem until customers, suppliers or employees report suspicious messages.
How Can You Protect Your Domain?
The good news is that organisations can take proactive steps to reduce the risk of domain impersonation.
Technologies such as:
- SPF (Sender Policy Framework)
- DKIM (DomainKeys Identified Mail)
- DMARC (Domain-based Message Authentication, Reporting and Conformance)
help organisations authenticate legitimate email sources and make it significantly more difficult for attackers to spoof their domain.
Together, these email authentication standards provide greater visibility, stronger protection and improved trust in business communications.
Improve Visibility and Strengthen Email Security
Domain spoofing remains a common technique used by cyber criminals, but organisations do not have to face the risk blindly.
By understanding who is sending email on behalf of your domain and implementing technologies such as SPF, DKIM and DMARC, businesses can reduce the likelihood of successful impersonation attacks, protect their reputation and build trust with customers and partners.
At Indiko Data, we help organisations gain visibility into their email landscape and strengthen email security through solutions such as Red Sift, helping businesses identify risks and improve domain protection.
