© 2026 Check Point Software Technologies Ltd. All rights reserved.

Overview Getting email security “right” is a trial. After all, more than 3.4 billion phishing emails make their way around the globe everyday – many of which contain unique, never-before-seen threats.1

In this short guide, discover insights into email security issues and blind spots that could render your organization uniquely vulnerable to threats. Are you and your organization thinking about the following?

A CISO’S GUIDE

Identifying & Mitigating Gaps Enterprise Email Protection

1. The Problem of Legacy Solution Reliance

Over-reliance on DMARC, SPF, and DKIM

• While essential, these protocols alone cannot catch new attack types. Attackers can easily bypass these filters by using tactics such as display name spoofing and phishing via compromised third- party accounts.

• With over-reliance on DMARC, SPF and DKIM, organizations may see increased vulnerability to domain spoofing and credential phishing attacks.

• As a solution, organizations should implement advanced threat detection that makes use of artificially intelligent and machine-learning powered tools to identify anomalous email behavior beyond the capabilities of legacy systems.

Basic Spam Filtering Only

• Using carefully crafted language and logos, cyber criminals can engage in a level of manipulation– through BEC and spear-phishing attacks–that can circumvent spam filters.

• Making matters worse, legacy spam filters commonly lack built-in investigative technologies. As a result, organizations may experience security breaches and financial losses.

• To avoid these potential pitfalls, organizations should implement email security that leverages advanced behavioral analysis and real-time threat intelligence to spot hidden phishing attempts; even from seemingly legitimate sources.

Limited SaaS Security Coverage

• Many organizations fail to extend email security to SaaS-based platforms like Microsoft 365 and Google Workspace.

• In turn, SaaS environments are becoming targets and users are largely unaware of the escalation in threats.

• To detect and mitigate threats across all collaboration tools and cloud environments, integrate SaaS-specific security measures with your email protection strategy.

A CISO’S GUIDE IDENTIFYING & MITIGATING GAPS 2

© 2026 Check Point Software Technologies Ltd. All rights reserved.

2. Understanding Sophisticated Email-Based Threats

Calendar-based Phishing • Attackers are now exploiting

calendar invites and events to distribute phishing links or malicious attachments. These tactics often bypass traditional email security filters as the invites appear legitimate.

• Subsequently, people are deceived into clicking on malicious links or downloading malware through calendar events, leading to potential data breaches.

• For your organization, implement security measures that specifically analyze calendar invitations and cross-check them with email content to flag potential threats.

Collaboration Tool Abuse • To launch phishing attacks,

attackers are taking advantage of collaboration tools like Slack, Teams, and Zoom, as these tools are often seen as trusted environments.

• Because security mechanisms are easily bypassed, credential theft and unauthorized access to sensitive corporate data can occur.

• Ensure that your security tools cover all collaboration platforms, applying email-like security filters to tools such as Teams, Slack, and other workplace communication services.

Multi-channel Attacks • Multi-channel attacks, where

cyber criminals use a strategic combination of SMS, email and voice phishing (vishing), create confusion and increase the probability of successful enterprise exploitation.

• These attacks ultimately lead to data exfiltration, financial fraud, and unauthorized system access.

• Organizations are encouraged to implement multi-layered security that can detect and correlate threats across multiple channels (email, SMS, voice), ensuring a unified defense posture.

3. The Importance of an Integrated Cyber Security Approach

Siloed Security Solutions • Many organizations use

non-interoperable security solutions for various parts of their infrastructure (email, endpoint, network). The fragmentation results in a splintered approach to detecting and coordinating attacks.

• In turn, organizations may experience delayed attack response times, increased attack dwell time, and a higher risk of data breaches.

• Organizations are encouraged to invest in an integrated email security solution that works seamlessly with other security tools such as endpoint protection, network monitoring, and threat intelligence platforms. Integration enables real-time threat correlation, faster detection, and better incident response.

Missing Cross-platform Visibility

• Because cyber security tooling doesn’t always provide visibility across platforms, especially in hybrid and multi-cloud environments, CISOs may be at a loss when it comes to detecting threats that affect email, collaboration tools, cloud storage and endpoints.

• In turn, organizations may not detect threats in a timely manner and may see slow response times.

• Ensure that your organization’s email security system provides cross-platform visibility, enabling you to monitor threats across cloud-based tools, on-premise infrastructure, and remote endpoints.

Poor Threat Intelligence Sharing

• Isolated security teams may have difficulty sharing actionable threat intelligence, resulting in slower detection of advanced persistent threats (APTs) or zero-day exploits.

• As a result, teams may miss opportunities to proactively defend against emerging threats.

• The best approach is to invest in a centralized threat intelligence sharing platform that allows security teams to exchange insights and collaborate on threat hunting efforts.

A CISO’S GUIDE IDENTIFYING & MITIGATING GAPS 3

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© 2026 Check Point Software Technologies Ltd. All rights reserved.

4. Addressing the Human and Operational Deficiencies in Email Security

Limited Security Staff Training • Many organizations fail to properly train security staff and end-users on the latest email security threats and best

practices. However, without ongoing education, teams may not be able to identify and respond to new attack types. • In turn, organizations may see an increased number of successful phishing attacks, largely caused by human error. • CISOs are obliged to provide routine training for security teams and employees alike, focusing on advanced threats

like spear-phishing, calendar phishing, and collaboration tool abuses. Email security products with built-in training tools can prove time-saving and effective.

How Check Point Email Security Can Close Gaps Check Point offers comprehensive email and collaboration security solutions that address these critical blind spots. With real-time threat detection, AI-powered analysis, and cross-platform visibility, Check Point ensures your organization is prepared to defend against today’s most advanced email threats.

• Unified Security Platform: Protects email, calendars, and collaboration tools in one integrated solution.

• Advanced Threat Detection: Leverages machine learning and behavior analysis to detect sophisticated phishing and credential theft attempts.

• Seamless Integration: Works in harmony with your existing IT infrastructure for a streamlined defense strategy.

• Proactive Defense: Equip your team with the tools to stay ahead of evolving threats with constant monitoring and threat intelligence.

Request a Demo Today Learn how Check Point Email Security can help close your organization’s email security gaps and strengthen your defense against evolving cyber threats. Get a demo today.

https://pages.checkpoint.com/harmony-email-request-demo.html