What Is Email Spoofing and How Do You Protect Your Business From It?
One of the Most Effective Attacks Costs Almost Nothing to Pull Off
Email spoofing is the practice of sending an email that appears to come from a trusted source when it actually comes from somewhere else entirely. For small businesses, spoofed emails are one of the most common starting points for fraud, data theft, and unauthorized access to business systems. Understanding how it works is the first step toward making sure your business doesn’t fall victim to it.
How Email Spoofing Works
Email was not originally designed with security in mind. The protocol that powers it doesn’t have a built-in mechanism to verify that the person sending a message is actually who they claim to be. This means that with the right tools, anyone can send an email that displays any name and email address they want in the from field. The message looks completely legitimate in your inbox because your email client shows you whatever the sender put in that field, not information about where the message actually originated. A spoofed email might appear to come from your bank, a vendor you work with regularly, a government agency, or even your own organization, and the goal is to get the recipient to take an action based on the false belief that the request is coming from a trusted source.
The Business Email Compromise Problem
One of the most financially damaging forms of email spoofing is called business email compromise. In this scenario, an attacker spoofs or compromises the email address of someone in a position of authority, often an owner or a financial officer, and uses it to request a wire transfer, a change in payment information, or access to sensitive data. The recipient, believing they’re responding to a legitimate internal request, complies. By the time the fraud is discovered, the money is gone and recovery is difficult or impossible. This type of attack targets small businesses regularly because they often have less oversight around financial transactions and fewer controls in place to verify unusual requests.
Technical Protections That Help
There are three email authentication standards that work together to make spoofing harder: SPF, DKIM, and DMARC. SPF specifies which mail servers are authorized to send email on behalf of your domain. DKIM adds a digital signature to outgoing messages that receiving servers can verify. DMARC builds on both and tells receiving servers what to do when a message fails those checks. Configuring these records correctly on your domain makes it significantly harder for attackers to convincingly spoof your email address, and helps filter out spoofed messages pretending to come from other protected domains. Many small businesses have none of these records configured, which means their domain can be spoofed freely and they have no visibility into when it’s happening.
What Your Team Needs to Know
Technical protections reduce the volume of spoofed email that gets through, but they don’t eliminate the problem entirely. Employee awareness is the other half of the defense. Your team should know that any email requesting a wire transfer, a change in payment details, login credentials, or unusual access should be verified through a separate channel before acting on it. A quick phone call to confirm that the request is legitimate takes thirty seconds and can prevent significant financial loss. Employees should also know how to look beyond the display name in an email and check the actual sending address, which most email clients make accessible with a single click. If you’re not sure whether your domain has the right protections in place, a free assessment can answer those questions clearly.
Protecting your business from email-based threats including spoofing and business email compromise is part of how we manage your IT environment. Glitch Technology provides managed IT services and computer support in Jacksonville, IL. We take full ownership of IT environments for small businesses and municipal organizations through proactive monitoring, preventative maintenance, and strategic planning.