Best Email Security Tools for Detecting Phishing, Spoofing and Email Fraud

Email remains one of the most widely used communication channels in business, but it is also a major target for cybercriminals. Attackers use fraudulent messages to steal passwords, redirect payments, distribute malware, impersonate executives and gain access to confidential company information. A single convincing email can expose an organization to financial losses, operational disruption and reputational damage.

The challenge is that modern email attacks do not always look suspicious. A phishing message may imitate a familiar supplier, a spoofed email may appear to come from a company’s own domain, and a business email compromise attack may use a legitimate account that has already been taken over.

Traditional spam filters are useful, but they are not always enough to identify sophisticated threats. Businesses increasingly rely on dedicated email security tools that analyze sender behavior, inspect links and attachments, verify domain authentication, detect impersonation and respond to suspicious messages.

The following are 15 email security tools worth considering when choosing technology to protect business communication.

1. Microsoft Defender for Office 365

Microsoft Defender for Office 365 is a natural starting point for organizations that use Microsoft 365. It provides security capabilities designed to protect Exchange Online, Microsoft Teams, SharePoint and OneDrive against threats delivered through collaboration and communication channels.

Its email protection features help detect phishing, malicious attachments, suspicious URLs and impersonation attempts. Safe Links checks URLs when users click them, while Safe Attachments analyzes potentially dangerous files in a protected environment. Anti-phishing policies can also help identify messages that imitate executives, colleagues or trusted domains.

Another advantage is its integration with Microsoft’s wider security environment. Administrators can investigate incidents, review threat information and coordinate responses through Microsoft’s security management tools.

Best for: Businesses using Microsoft 365 that want integrated protection against phishing, malware and impersonation.

2. Proofpoint Email Protection

Proofpoint is an established name in enterprise email security. Its solutions are designed to protect organizations against phishing, business email compromise, malware, malicious attachments and targeted attacks.

Proofpoint uses threat intelligence, advanced detection techniques and policy controls to examine incoming messages. Its security capabilities can help identify suspicious sender behavior, fraudulent links, impersonation attempts and messages designed to manipulate employees into transferring money or revealing confidential information.

Proofpoint is particularly relevant to organizations that handle sensitive communications or operate in regulated industries. Depending on the product and deployment, businesses can also access capabilities related to data loss prevention, email encryption, threat investigation and security awareness.

Its range of products means organizations should compare the exact package and features they need rather than assuming every capability is included in every subscription.

Best for: Large businesses, financial organizations and enterprises that need comprehensive email threat protection.

3. Mimecast Email Security

Mimecast provides email security and resilience services for organizations that want to reduce exposure to phishing, impersonation, malware and email fraud.

Its security platform examines incoming messages for suspicious content, malicious attachments, harmful URLs and signs of sender impersonation. It also offers capabilities for protecting against social engineering and business email compromise, where attackers manipulate employees into taking actions that benefit the criminal.

Mimecast is more than a basic spam-filtering product. Depending on the selected services, organizations can combine email security with continuity, archiving, data protection and other communication management capabilities.

For companies with established IT departments, this broader platform approach can make it easier to manage several email-related security requirements through one provider. However, the range of features may be more than a small organization needs.

Best for: Mid-sized and large businesses looking for email security alongside continuity and compliance capabilities.

4. Abnormal AI

Abnormal AI focuses on detecting suspicious email behavior, particularly attacks that exploit trust rather than obvious technical weaknesses.

Business email compromise is a good example. An attacker may send a message that contains no malicious attachment or suspicious link. Instead, the message may request an urgent payment, ask an employee to change supplier banking information or impersonate a senior manager.

Traditional filters can struggle with these messages because the content may appear harmless. Abnormal AI uses behavioral analysis to evaluate communication patterns, relationships, sender characteristics and other contextual signals.

This approach is useful when organizations need protection against targeted social engineering and account-related threats. It is designed to work with cloud email environments such as Microsoft 365 and Google Workspace, subject to the product’s supported integrations.

Best for: Organizations concerned about executive impersonation, business email compromise and sophisticated social engineering.

5. IRONSCALES

IRONSCALES provides email security and phishing protection with an emphasis on detecting, investigating and responding to threats.

Its capabilities include protection against phishing, business email compromise, impersonation and malicious attachments. The platform also supports employee-reported phishing workflows, helping security teams investigate suspicious messages submitted by users.

One useful aspect of this approach is the relationship between detection and employee awareness. Staff members can report messages they do not trust, while security teams can use those reports to investigate threats and improve response processes.

IRONSCALES is worth evaluating for organizations that want a combination of automated detection and employee participation. Businesses should compare its available integrations, reporting features and response capabilities with their existing email environment.

Best for: Companies that want phishing detection combined with employee reporting and security awareness capabilities.

6. Check Point Harmony Email & Collaboration

Check Point Harmony Email & Collaboration protects email and other collaboration environments against phishing, malicious links, malware and impersonation.

The platform is designed to examine messages and associated content for suspicious activity. Its capabilities can help identify threats that target Microsoft 365 and Google Workspace users, including social engineering attempts and malicious files.

An important consideration is its integration with the wider Check Point security ecosystem. Organizations already using Check Point products may find value in managing email protection alongside other security controls.

The product is particularly relevant to businesses that need visibility across email and collaboration applications rather than treating every communication platform as a separate security problem.

Best for: Businesses using cloud collaboration platforms that want integrated phishing and malware protection.

7. Barracuda Email Protection

Barracuda Email Protection provides a range of services designed to defend business email against spam, phishing, malware, spoofing and other threats.

Its security features can include sender authentication checks, attachment analysis, URL protection, impersonation detection and email filtering. Depending on the selected package, businesses may also have access to encryption, data loss prevention and email continuity.

Barracuda is relevant to small and medium-sized businesses as well as managed service providers supporting multiple organizations. Its range of deployment and management options can help IT teams select a configuration that fits their existing infrastructure.

Businesses should examine how the product handles executive impersonation, supplier fraud and suspicious messages that contain no malicious attachment. These attacks are often more difficult to detect than ordinary spam.

Best for: Small and medium-sized businesses and IT service providers seeking broad email protection.

8. Cisco Secure Email

Cisco Secure Email is designed to protect organizations against email-based threats, including phishing, malware, malicious URLs and targeted attacks.

Its security capabilities use threat intelligence and message analysis to help identify suspicious communication before it causes damage. Depending on the product configuration, organizations can also use additional controls for encryption, data loss prevention and security management.

Cisco is particularly relevant to enterprises that already use its networking and security products. Integration with a broader security environment can help teams investigate threats and coordinate responses across different parts of their infrastructure.

For organizations comparing vendors, it is worth reviewing the available deployment options and how the product fits with their current email service.

Best for: Enterprises that want email protection integrated with a broader Cisco security environment.

9. Sophos Email

Sophos Email provides protection against phishing, spam, malware and other email-borne threats. It is designed to help businesses reduce the number of dangerous messages reaching employees.

Its security features can include sender verification, URL protection, attachment scanning and impersonation controls. Sophos also offers integration with its wider cybersecurity portfolio, which can be useful for businesses already using Sophos endpoint and network protection.

A coordinated security environment can make investigations easier because email threats may be connected to suspicious activity on a computer or network.

Sophos is worth considering for organizations that want a managed email security solution without building a complex security infrastructure internally.

Best for: Small and medium-sized businesses and organizations already using Sophos security products.

10. Trend Micro Email Security

Trend Micro Email Security helps organizations detect and block threats delivered through email. Its protection capabilities cover phishing, malicious attachments, suspicious URLs, malware and business email compromise.

Email fraud increasingly involves convincing messages that imitate legitimate business conversations. Trend Micro’s security approach uses threat intelligence and advanced analysis to help identify suspicious activity that may not be obvious from the message’s wording alone.

Organizations can evaluate Trend Micro as part of a wider cybersecurity strategy, particularly when they already use its endpoint, network or cloud security products.

When comparing solutions, administrators should pay attention to the quality of impersonation detection, investigation tools and integration with existing security operations.

Best for: Businesses seeking email threat protection as part of a broader cybersecurity platform.

11. Fortinet FortiMail

Fortinet FortiMail is an email security solution designed to protect business messaging environments against spam, phishing, malware and email fraud.

It provides email filtering and security controls that can help organizations identify suspicious messages, inspect attachments and enforce communication policies. Its deployment options make it relevant to businesses with different infrastructure requirements.

FortiMail can be particularly attractive to organizations already using Fortinet products. Integration with the wider Fortinet Security Fabric can help connect email security events with other network and security information.

Businesses should evaluate whether they need a cloud-based, virtual or physical deployment and how each option fits their email architecture.

Best for: Organizations using Fortinet infrastructure that want email protection integrated with their existing security environment.

12. PowerDMARC

PowerDMARC focuses on email authentication and domain protection. It is especially useful for businesses that want to reduce domain spoofing and understand which services are sending email using their domain.

Its capabilities support the management and monitoring of SPF, DKIM and DMARC. These authentication standards help receiving email systems determine whether messages are authorized to use a particular domain and whether their contents have been protected against unauthorized modification.

DMARC reporting is particularly valuable because it can reveal legitimate and suspicious sources sending messages that claim to come from a company’s domain.

PowerDMARC does not replace a full inbound phishing gateway. Instead, it addresses an important part of email security: preventing criminals from abusing an organization’s domain identity.

Best for: Businesses that want to monitor domain authentication, reduce spoofing and move toward stronger DMARC enforcement.

13. EasyDMARC

EasyDMARC provides tools for managing email authentication and monitoring domain-related security activity.

Its services help businesses work with SPF, DKIM and DMARC records, understand authentication results and review reporting information. These records are important because attackers frequently exploit weak or misconfigured domain authentication to make fraudulent messages appear legitimate.

The platform can help administrators identify unauthorized sending sources, investigate authentication failures and improve their domain’s email security configuration.

EasyDMARC is especially useful for businesses that send email through several services, such as marketing platforms, customer relationship management systems, transactional email providers and internal mail servers.

However, DMARC monitoring should be combined with phishing protection because criminals can also impersonate individual employees or use lookalike domains that are not owned by the victim organization.

Best for: Businesses managing several email-sending services and seeking better visibility into domain authentication.

14. dmarcian

dmarcian specializes in email authentication and DMARC reporting. It helps organizations understand how their domains are being used to send email and whether those messages pass authentication checks.

Its tools can help administrators interpret DMARC reports, identify legitimate sending services and investigate unauthorized sources. This is important because organizations often have multiple systems sending messages on their behalf, and not all of them are configured correctly.

For example, a company might use Microsoft 365 for employee communication, an email marketing platform for newsletters and a separate service for password-reset notifications. If these systems are not properly authenticated, some messages may fail authentication or create opportunities for domain abuse.

dmarcian helps make that activity easier to understand and manage.

Best for: Organizations that need clearer DMARC reporting and a structured approach to domain authentication.

15. Sublime Security

Sublime Security provides an email security platform with a focus on customizable detection and investigation. It is designed for security teams that want visibility into email threats and more control over how suspicious messages are identified.

Its approach is relevant to phishing, business email compromise, malicious links and other attacks that may evade conventional filtering. Security teams can use detection rules and investigation workflows to examine suspicious messages and adapt protection to their environment.

This flexibility can be valuable for organizations with experienced security staff who want to build or refine detection logic rather than rely entirely on fixed filtering policies.

However, customizable security tools may require more technical expertise than a simple managed email filtering service.

Best for: Security teams that want flexible email threat detection and greater control over investigation and response.

What to Look for When Choosing an Email Security Tool

Choosing an email security platform should begin with understanding the threats that matter most to your organization. A company experiencing repeated phishing attempts may need different controls from a business that is mainly concerned about fraudulent supplier payment requests.

Several features deserve particular attention.

Phishing Detection

The platform should identify messages designed to steal passwords, financial information or confidential business data. Look for URL analysis, attachment scanning, sender reputation checks and detection of suspicious message patterns.

It is also important to consider how the tool handles newly created phishing websites and messages that imitate familiar brands.

Email Spoofing Protection

Spoofing occurs when an attacker makes a message appear to come from a trusted sender or domain. Strong protection should include support for SPF, DKIM and DMARC.

These technologies help receiving systems verify whether a message is authorized to use a domain. DMARC reporting and enforcement can provide additional visibility and protection against unauthorized use of a company’s domain.

Business Email Compromise Detection

Business email compromise attacks often involve social engineering rather than malicious software. Criminals may impersonate a manager, supplier or business partner to request payments or confidential information.

Look for tools that analyze sender behavior, communication relationships and unusual requests. Behavioral analysis can be particularly valuable when the message does not contain a suspicious link or attachment.

Attachment and URL Scanning

Email attachments can contain malware, ransomware or other harmful content. Links may direct users to fake login pages or websites designed to steal information.

A capable platform should inspect attachments and URLs using appropriate security analysis techniques. Some solutions also support sandboxing, where suspicious files are executed in an isolated environment for examination.

Reporting and Incident Response

Detection is only one part of email security. Security teams need to understand what happened, which users received a message and whether anyone interacted with it.

Useful features include centralized reporting, message investigation, threat alerts, automated removal of malicious messages and integration with security information and event management systems.

Email Security Tools vs. DMARC Monitoring Tools

It is important to understand that not every product in this list performs the same job.

Tools such as Proofpoint, Mimecast, Microsoft Defender for Office 365, Abnormal AI and IRONSCALES focus on detecting and stopping malicious messages. They help protect users from phishing, malware, impersonation and business email compromise.

PowerDMARC, EasyDMARC and dmarcian concentrate more heavily on email authentication and domain protection. They help organizations understand who is sending email using their domains and whether messages pass SPF, DKIM and DMARC checks.

Both categories are important, but they are not interchangeable. A company can have correctly configured DMARC records and still receive phishing emails from an attacker’s unrelated domain. Likewise, a strong inbound email filter does not automatically prevent criminals from spoofing the company’s own domain.

A layered approach is usually more effective than relying on one product.

How Businesses Can Reduce Email Fraud

Security software works best when it is supported by sensible business processes.

First, organizations should configure SPF, DKIM and DMARC for every domain used to send business email. They should identify legitimate sending services before moving toward stricter DMARC enforcement.

Second, employees should be trained to recognize unusual payment requests, unexpected password-reset messages, suspicious attachments and requests to disclose confidential information. Staff should verify sensitive financial instructions through a separate, trusted communication channel.

Third, businesses should use multifactor authentication for email accounts, especially administrator and executive accounts. Strong authentication can reduce the risk of attackers accessing legitimate mailboxes through stolen passwords.

Finally, organizations should establish a clear process for reporting suspicious messages. Employees should know where to send questionable emails and what to do if they have clicked a link or disclosed information.

Conclusion

The best email security tools help businesses defend against phishing, spoofing, business email compromise and other forms of email fraud. However, the right choice depends on the organization’s size, email platform, security requirements and technical resources.

Microsoft Defender for Office 365 is a logical option for Microsoft 365 environments, while Proofpoint and Mimecast are worth evaluating for organizations that need broad enterprise protection. Abnormal AI and IRONSCALES are relevant to businesses concerned about sophisticated impersonation and social engineering. Barracuda, Sophos and other established security providers offer additional options for companies seeking managed email protection.

For domain spoofing prevention, PowerDMARC, EasyDMARC and dmarcian can help organizations strengthen authentication and understand how their domains are being used.

Ultimately, no single product can eliminate every email threat. The strongest strategy combines email filtering, authentication, account security, employee awareness and a reliable incident response process. By investing in these layers, businesses can make it significantly harder for attackers to use email as a route into their operations.