If you’ve ever wondered why suspicious emails still appear in your inbox despite having spam filtering in place, you’re not alone.
One of the most common questions we get from clients is, “Why did this email get through?”
The good news is that your spam filter is working. In fact, it’s probably blocking thousands of unwanted emails every month without you ever knowing about it. The challenge is that modern phishing attacks have become far more sophisticated than the obvious spam emails most people are familiar with.
What’s Actually Happening Behind the Scenes?
Every email that reaches your business is checked against a range of security rules before it’s delivered. Your spam filter looks at the sender, the content of the message, any links or attachments, and a range of other indicators to determine whether the email is trustworthy.
The vast majority of malicious emails are identified and blocked automatically. Most businesses only see a small fraction of the threats that are actually being sent to them each day.
So Why Do Some Emails Still Get Through?
The simple answer is that attackers are constantly adapting.
Many phishing emails are designed to look like legitimate business communications. They may appear to come from a supplier, a customer, a courier company, or even Microsoft 365. The branding looks professional, the language seems normal, and there may be very little to immediately suggest the email is suspicious.
Cybercriminals know how email filters work and actively try to make their emails appear legitimate. Because of this, some messages can occasionally make it through even well-configured security systems.
This doesn’t mean the filter has failed. It means the email didn’t display enough warning signs to be confidently identified as malicious at the time it was received.
Spam and Phishing Aren’t the Same Thing
When people talk about spam, they’re often referring to any unwanted email. However, there is an important difference between spam and phishing.
Spam is usually unsolicited marketing or bulk email. It’s annoying, but generally low risk.
Phishing emails are designed to trick someone into taking action, such as clicking a malicious link, entering login credentials, or transferring money. While a spam email might waste a few seconds of your day, a successful phishing attack can have serious consequences for a business.
What Can Businesses Do?
Technology plays a critical role in email security, which is why we provide and manage spam filtering for our clients. However, email security works best when technology and user awareness work together.
If something looks unusual, don’t assume it’s safe simply because it arrived in your inbox. Taking a moment to verify an unexpected request or reporting a suspicious email can prevent a costly mistake.
Regular reviews of your email security settings, combined with ongoing staff awareness, can significantly reduce your risk of falling victim to modern phishing attacks.
Your Spam Filter Is Working Harder Than You Think
The reality is that most businesses only see the small number of suspicious emails that manage to get through. They don’t see the thousands of malicious messages that are blocked behind the scenes every month.
While no email security solution can guarantee that every phishing email will be stopped, a properly configured spam filter remains one of the most effective ways to reduce risk and protect your business.
If you ever receive an email you’re unsure about, our team is always happy to help verify whether it’s legitimate.
