Businesses receive emails from all kinds of people every day. Customers send enquiries, suppliers share invoices, partners exchange documents, and job applicants submit resumes. Alongside these legitimate messages, businesses also deal with unwanted emails, including spam and other unsolicited messages. While spam messages can be frustrating, the emails that pose the greatest risk are those sent by cybercriminals. A single deceptive email is all it takes to bring a business to its knees.
That’s why having a robust email security system in place is a fundamental pillar of protecting your business operations, sensitive data, and hard-earned reputation.
What are the common email security issues?
Modern email security threats take many forms, and understanding how they work is the first step in protecting your business.
Phishing attacks
Phishing attacks are one of the most common email security threats. In a phishing campaign, attackers send fraudulent emails that appear to come from trusted organizations, colleagues, or well-known brands. The ultimate aim is to lure the recipient into clicking on harmful links, opening infected attachments, or handing over their login credentials without a second thought.
Most phishing emails try to manipulate you in one of two ways: by creating panic with urgent alerts about locked accounts, or by baiting you with unbelievable offers that seem far too good to be true. Successful phishing attacks enable cybercriminals to gain unauthorized access to company systems, steal sensitive information, or install malicious software that spreads throughout the network.
Email spoofing
Email spoofing involves forging an email so it appears to come from a trusted sender. A message may display your company’s domain, a manager’s name, or a well-known supplier even though it was sent by an attacker.
Recipients are more likely to trust familiar names, making spoofed emails highly effective. Criminals often combine spoofing with phishing to trick users into approving payments or sharing confidential data.
Business email compromise
Unlike mass phishing attacks, business email compromise (BEC) targets specific organizations and individuals. These attacks often involve impersonating executives, finance staff, or trusted vendors to request payments or confidential information.
Attackers typically spend time learning how a business communicates before sending their fraudulent requests. As a result, the emails often look authentic and may even reference ongoing projects or existing invoices.
Once they find their way in, cybercriminals can request unauthorized financial transactions, damage a company’s reputation, or steal sensitive data that can later be sold or used in future attacks.
Account takeover and session hijacking
An account takeover occurs when attackers obtain a user’s login information and gain control of their email accounts. Stolen passwords may come from phishing, reused credentials, or previous data breaches involving other online services.
When cybercriminals gain access to an email account, they can monitor conversations and impersonate employees without raising immediate suspicion. They may also use the account to reset passwords or send fraudulent messages across the organization.
Unpatched software on email servers
Keeping email systems updated is an essential part of maintaining good security. Older software often contains vulnerabilities that attackers actively search for.
Some exploits take advantage of newly discovered weaknesses before software vendors release fixes. These are commonly known as zero-day attacks, and they can expose organizations to serious security incidents if systems remain unpatched.
Data leaks and sensitive information exposure
Email remains one of the most common ways employees exchange contracts, financial records, customer information, and other sensitive information. A simple mistake can create serious risks. Sending an attachment to the wrong recipient or forwarding confidential data outside the company may expose sensitive information. Personally identifiable information and intellectual property are among the types of data that can be compromised.
How can businesses better protect their email?
No single tool can stop evolving threats. Implementing the following email security measures and strategies can significantly minimize risk.
- Use advanced email filtering: Modern email filtering solutions block spam, known malware, suspicious attachments, dangerous links, and other email-based threats before they reach users. These solutions come with secure email gateways and threat intelligence systems that proactively detect, analyze, and block sophisticated cyberthreats before they reach your inbox.
- Conduct security awareness training: Employees remain one of the most important lines of defense. Effective user education and training teaches staff how to recognize suspicious emails and fake login pages. It also helps employees verify unexpected requests and report unusual activity. Regular phishing simulations and refresher sessions help employees build confidence without creating fear or blame.
- Monitor user activity: Monitoring unusual account behavior can help security teams detect potential threats before they become larger problems. Examples include logins from unfamiliar locations, impossible travel scenarios, unusual email forwarding rules, or large numbers of outbound messages.
- Keep software updated: Regular updates for email servers, operating systems, browsers, and security software close known vulnerabilities that attackers frequently exploit. Prompt patch management remains one of the simplest yet most effective security measures available.
- Protect outbound emails: Organizations should combine data loss prevention tools with email encryption when sending sensitive data. Data loss prevention systems inspect outgoing messages for confidential content and can block, quarantine, or flag emails that violate company policies before information leaves the organization.
- Establish clear email usage policies: Written policies give employees practical guidance on acceptable use of company email. Topics should include handling attachments, verifying payment requests, reporting suspicious messages, password requirements, and using personal devices for work. Clear expectations reduce uncertainty and support consistent email security best practices across the organization.
- Fortify user access: Strong passwords remain important, but they should always be paired with multifactor authentication. Even if attackers obtain a password through phishing or another attack, an additional verification step makes it much harder for them to access company systems. Limiting user permissions based on job responsibilities also reduces the impact if an account is compromised.
Businesses should also regularly review their email security tools and strategies as new advanced threats emerge. Many organizations turn to managed service providers for ongoing monitoring and support to keep their email security defenses up to date.
Keep your inbox protected with Refresh Technologies
Refresh Technologies helps businesses implement advanced email security, strengthen email security best practices, and protect against modern email security breaches before they disrupt your organization.
If you’re looking to enhance email security with practical solutions tailored to your business, contact us today. Our team can help build a stronger defense that keeps hackers, phishing attempts, and other malicious threats out of your inbox.