How to Protect Your Organisation from Email Spoofing and Phishing Attacks

By far the most common type of breach or attack is phishing, affecting 84% of UK businesses and 83% of charities, according to the UK Government’s Cyber Security Breaches Survey 2024. 

This is followed by email impersonation (also known as spoofing) at 35% of businesses and 37% of charities, and malware attacks at 17% of businesses and 14% of charities.

Spam filters and security tools block many threats, but attackers bypass them by targeting employees. A single convincing email is often enough to get someone to click a link, open a file, or send money.

This post explores:

• What email spoofing actually is, and how attackers forge trusted identities.
• Why even companies with strong technical security still fall victim.
• The practical ways employees can spot and stop email-based attacks.
• Why ongoing security awareness is essential for long-term protection.
• How Deployflow supports UK SMBs in building resilient, people-focused cyber defences.

By the end, you’ll know exactly how attackers target businesses like yours, which warning signs your staff must watch for, and the steps that actually reduce your risk, both technically and operationally.

What Is Email Spoofing and How Does It Work?

At its core, email spoofing is simple: attackers forge the “From” address in an email to make it look like it’s coming from someone the recipient trusts. The goal is deception. If an email appears to come from a manager, supplier, or familiar service, the recipient is more likely to follow instructions without second-guessing.

For example, an employee might receive an email that says it’s from “Peter Parker [email protected]”. 

But if they inspect the full header, they might notice the real sender is actually something like “Peter Parker peterparker@[email protected].”

Spoofed emails often carry urgent requests designed to short-circuit caution:

Real-World Case: How Email Spoofing Cost Save the Children Nearly $1 Million

In 2017, cybercriminals successfully spoofed senior executives and tricked employees at Save the Children into wiring nearly $1 million to a fraudulent supplier in Japan. 

The attackers used spoofed email addresses and fake documents to impersonate legitimate vendors. Because the request looked routine and came during a busy period, the staff processed the payment. The fraud wasn’t discovered until weeks later during an internal audit. 

This case highlighted how even experienced teams at major organisations can fall victim to well-crafted email spoofing and social engineering attacks.

Why Businesses Are Still Vulnerable to Phishing and Spoofing

“I am someone who is aware of the dangers of replying to suspect links, and I still fell for it. If that can happen to me then it can happen to anyone who isn’t thinking about this all day, every day.” — Philip Murray, cybersecurity professional and phishing victim in his LinkedIn post.

Even trained professionals can be caught off guard because phishing attacks often strike at moments of stress, distraction, or urgency. Attackers craft emails that feel familiar, using known names, plausible requests, and time pressure to override caution. 

When routines are busy and attention is divided, even small lapses in judgment can lead to costly mistakes.

Despite the sophistication of modern email security systems, these attacks continue to work for one simple reason: they target people, not just technology.

Spam filters, anti-virus software, and email gateways focus on detecting known patterns, such as blacklisted domains, malicious attachments, or suspicious code. But many spoofing attacks rely purely on social engineering. The attacker doesn’t need to exploit software; they exploit human trust.

How to Spot and Prevent Email-Based Attacks

Although attackers are skilled, disciplined habits can stop most email-based attacks before damage is done:

1. Check the full sender address. Attackers often mask the true email address behind a familiar name. For example, an email may display as “Finance Department,” but the full address might read “[email protected]”, a clear red flag if reviewed carefully.
2. Be sceptical of unexpected requests. If an email asks for urgent payments or credential updates, especially outside normal processes, treat it with caution. 
3. Verify via trusted channels. Always confirm requests by calling known contacts directly. Do not trust phone numbers, email addresses, or links provided inside the suspicious email itself.
4. Avoid clicking suspicious links. Hover over links to check the actual destination. If an email says “log in to your Microsoft 365 account”, but the link directs to “secure-login24h-update.com,” it’s fraudulent. When in doubt, manually enter known web addresses.
5. Never open unexpected attachments. Even if an attachment appears to come from a colleague, verify its legitimacy if it was not expected. Malicious attachments often carry ransomware or keyloggers hidden inside common file formats like PDFs or Excel spreadsheets.
6. Implement technical safeguards. Domain-based protections like SPF, DKIM, and DMARC verify whether incoming emails are legitimately authorised to use the company’s domain, reducing the chance of spoofed emails reaching employees.

For further technical guidance, the UK’s National Cyber Security Centre (NCSC) offers excellent advice on recognising and handling phishing scams.

Why Cybersecurity Awareness Training Must Be Ongoing

One training session doesn’t build lasting vigilance. Threats evolve constantly, and even well-trained employees forget details under pressure. 

Attackers monitor global events, company activity, and seasonal trends to craft more convincing scams. What worked six months ago won’t stop today’s tactics.

Phishing simulations give people a chance to identify real-world threats before they become a reality. Employees receive emails designed to look like the ones attackers actually send; things like fake invoices, supplier payment requests, or IT warnings. If someone clicks or responds, it shows where extra training is needed. It’s much better to catch these mistakes during a test than after money or data has already been lost.

Micro-trainings keep awareness fresh without overwhelming staff. Instead of lengthy annual seminars, short 5-10 minute sessions can cover new attack vectors. After the 2023 MOVEit supply chain breach, some UK companies ran micro-training on how attackers were using legitimate-looking partner emails to distribute malware.

Regular updates ensure staff stay ahead of emerging threats. For instance, when attackers began widely impersonating Microsoft Teams invitations in 2024, security teams quickly briefed staff to watch for domain mismatches in meeting links, preventing multiple credential theft attempts.

Even experienced IT professionals make mistakes when tired, distracted, or rushed. Fatigue, pressure, and routine create openings for attackers. That’s why ongoing training matters. It keeps security top of mind, even when focus slips.

How Deployflow Helps Build Human-Centric Cyber Defences

Email spoofing and phishing succeed not just because someone clicks a link, but because the infrastructure, access controls, and monitoring weren’t ready to catch or contain the attack.

Deployflow helps businesses reduce these risks by addressing the operational weaknesses that attackers rely on.

Strengthening Identity and Access Management (IAM) in the Cloud

Phishing emails often aim to steal credentials. If attackers gain access to a cloud account, the real damage begins: lateral movement, data exfiltration, or privilege escalation. 

Deployflow helps companies apply least-privilege access, enforce multi-factor authentication, and configure secure cloud environments where even stolen credentials don’t unlock everything.

For example, isolating admin privileges and enforcing conditional access policies means that if a spoofed email succeeds, the attacker still hits a wall.

Improving Infrastructure Visibility and Threat Detection

Spoofed emails often go unnoticed until it’s too late. With Deployflow’s cloud management solutions and infrastructure management, companies can detect unusual logins, access attempts, or system changes, key indicators of a successful phishing or spoofing attack.

Deployflow’s cloud-native tools help businesses flag suspicious activity early, allowing IT teams to act before attackers escalate access or move laterally.

Ensuring Systems Are Hardened and Recoverable

If an employee opens a malicious attachment or clicks on a spoofed link that delivers ransomware, the next line of defence is recovery and isolation. 

Deployflow’s DevOps and automation services help businesses:

A resilient infrastructure limits the damage of a successful spoofing attack and enables faster recovery, without days of downtime or data loss.

For businesses that want to build resilience into every layer of their infrastructure, Deployflow’s DevOps Service provides hands-on expertise in automating deployments, strengthening security, and ensuring faster recovery from incidents like spoofing and phishing attacks.

Supporting Email Security at the Infrastructure Level

Deployflow supports the secure setup of email authentication protocols such as SPF, DKIM, and DMARC as part of broader cloud and domain management. These safeguards help block spoofed emails by verifying sender legitimacy and ensuring that only trusted sources can send messages using your company’s domain.

Helping clients correctly configure domains and cloud services often includes aligning with email best practices, especially when setting up business-critical platforms like Microsoft 365 or Google Workspace. Cloud engineers can ensure your email infrastructure is correctly set up, reducing the likelihood that spoofed messages get delivered using your domain.

When Someone Slips, Your System Shouldn’t

Phishing and spoofing exploit weak infrastructure, excessive access, and overlooked blind spots. 

With deep experience supporting security-sensitive sectors like fintech, health tech, and regulated SMBs, Deployflow understands how to operationalise security, embedding it into cloud environments, DevOps pipelines, and daily workflows without slowing teams down.

Deployflow helps UK businesses harden systems, tighten controls, and build a culture that doesn’t fall for fake emails. 

So even if someone clicks the wrong link, it doesn’t become a crisis. It’s just another threat, neutralised before it spreads.

If you’re ready to make your defences as resilient as your team, contact Deployflow to get started.

Frequently Asked Questions About Phishing, Spoofing, and Email Security