List of the Top 21 Secure Email Gateway Software in 2025

N-able Mail Assure is a cloud-based solution for email security that delivers sophisticated protection against threats for both incoming and outgoing emails, utilizing collective threat intelligence, a comprehensive email archive, and round-the-clock email continuity services. The platform features multi-tenant web interfaces equipped with preset configurations, detailed reporting, and visual tools that enhance oversight and management of all email transactions. This innovative system employs proprietary technology that analyzes extensive email data to enhance its Intelligent Protection and Filtering engine. By incorporating real-time threat pattern detection and leveraging a diverse array of filtering technologies, N-able Mail Assure effectively safeguards users from spam, viruses, phishing attempts, impersonation, malware, and various other email-related dangers. Additionally, its seamless integration and user-friendly interface ensure that organizations can maintain robust email security with minimal effort.

Select a secure email hosting solution that aligns with your business requirements. By utilizing a reliable, encrypted, and ad-free email service, you can effectively manage your company's email communications. With Zoho Mail, you benefit from advanced data centers equipped with top-notch security protocols and continuous monitoring, guaranteeing an impressive uptime of 99.9%. Take advantage of secure email hosting that ensures encryption both at rest and in transit, complemented by S/MIME message encryption for heightened security. Create a distinct domain for your company and establish customized email addresses for every team member, which enhances your brand's recognition and trustworthiness. The comprehensive Control Panel offered by Zoho Mail acts as the primary interface for administrators, allowing for effortless management of all settings, configurations, and customizations. Administrators have the ability to add users, manage group aliases, and set policies to control email content within the organization. Moreover, retain emails for a specified period to fulfill compliance obligations and defend against potential legal issues. The e-Discovery feature facilitates quick access to these archived emails, ensuring your business can efficiently address inquiries or audits. Choosing Zoho Mail not only secures your email communications but also equips your business for long-term success with a dependable hosting solution that prioritizes security and user management. This commitment to safety and efficiency can be a game-changer in today's competitive landscape.

Boost your efficiency with a professional-grade email and calendar solution designed for businesses. Exchange allows for seamless collaboration on crucial documents while providing an organized inbox that prioritizes important messages and adapts to your personal work style, enabling you to handle tasks with greater effectiveness. Enjoy a tailored inbox equipped with valuable features, alongside a more organized approach to managing and responding to emails. The enhanced search capabilities yield faster and more thorough results, and the integration of Add-ins presents robust customization options that connect you to modern services and internal business tools. Moreover, improve your scheduling experience with an advanced calendar system that goes beyond basic appointment management by automatically extracting information from emails, such as flight confirmations and hotel reservations, while also suggesting venues based on your geographical position. Microsoft Exchange Online serves as a reliable and secure hosted email solution for businesses, prioritizing the safeguarding of your data with sophisticated security protocols. When these powerful tools are combined, they create a streamlined workflow that not only enhances productivity but also inspires your team to think more creatively and collaborate more effectively. This innovative approach to communication and scheduling can significantly transform how your organization operates.

Mimecast Advanced Email Security acts as a robust shield for businesses, safeguarding them against a range of email threats including phishing, malware, impersonation, and spam. Leveraging cutting-edge artificial intelligence and machine learning, Mimecast ensures rapid identification and prevention of threats, thus protecting vital information and ensuring business continuity. The solution features advanced filtering and scanning technologies for both incoming and outgoing messages, dramatically reducing the risk of data breaches while helping organizations meet compliance requirements. Furthermore, Mimecast offers comprehensive reporting and management tools, enabling IT teams to effectively monitor and address potential threats, making it an essential choice for companies seeking top-notch email security. By focusing on both protection and regulatory adherence, Mimecast emerges as an indispensable resource for businesses navigating the complexities of the digital age, ensuring they remain secure and compliant in their operations. This commitment to innovation and excellence is what sets Mimecast apart in the realm of email security solutions.

Proofpoint's Email Protection solutions, offered as both a cloud service and an on-premises option, deliver strong defense mechanisms against a variety of threats, including malware, impersonation emails, and business email compromise (BEC). The system's sophisticated email filtering addresses spam, graymail, and other unwanted communications effectively. Notably, it maintains seamless email functionality even during server disruptions. Esteemed as the leading email gateway in the market, Proofpoint captures a broad spectrum of threats that might slip past other security measures. By leveraging advanced machine learning technology through NexusAI, Email Protection adeptly classifies various email types and detects threats that do not contain harmful payloads, including impostor emails, thanks to its Advanced BEC Defense feature. Furthermore, users can automatically tag potentially dubious emails to raise awareness and recover any email within moments, which ensures a thorough approach to email security. This multi-layered defense strategy not only offers organizations reassurance but also supports them in navigating the intricate landscape of email communications while minimizing risks. The comprehensive features work together to create a secure environment where email interactions can thrive without constant worry.

Strengthening the protection of your email accounts is vital, as email continues to be the main conduit for various threats. It is important to expand your security strategies to detect dangerous threats proactively and to effectively respond to and manage emerging risks as they occur. Understanding the malicious strategies that can target your organization is crucial for prevention. By identifying the specific vulnerabilities your business faces and categorizing the threats, you can gain a clearer picture of which areas are most at risk of an attack. Employing AI-driven threat detection allows multiple systems to simultaneously scrutinize various elements of incoming emails. The data collected from these analyses ensures accurate threat identification, evaluates potential business risks, and aids in formulating appropriate response plans. Cyber threats can come from numerous sources, such as phishing attacks, business email compromises, malware infections, and ransomware invasions. Safeguard your organization against all these dangers by leveraging advanced threat intelligence, which empowers you to act swiftly against any emerging risks. Given the constant evolution of cyber threats, it is essential to stay one step ahead of potential attackers by adopting robust and comprehensive security solutions that evolve alongside the threat landscape. Additionally, regular training and awareness for employees can significantly bolster your defenses against these risks.

Email Security simplifies the process of safeguarding both incoming and outgoing emails. It offers functionalities to filter out spam from your inbox, encrypt messages for secure transmission, and archive emails to assist in managing your inbox space more effectively. By implementing these features, users can enjoy a more organized and secure email experience.

Empower your teams to boost productivity, ensure security, and uphold compliance within a complex digital ecosystem. Design a modern workplace that encourages enhanced data sharing, nurtures collaboration, and adapts to the needs of remote work. We provide premier solutions including advanced email encryption, secure file sharing, and thorough archiving for all business communications across multiple channels like email, social media, and instant messaging. Each of these services is backed by our dedicated support team, ready to assist you year-round in effectively managing personnel, technology, and workflows. With features such as automatic email encryption and strong data loss prevention, you can achieve unparalleled peace of mind for yourself, your employees, and your leadership team. Safeguard your organization against threats like malware and ransomware that could compromise your email and disrupt overall business functions. Furthermore, we guarantee secure message retention, making compliance and eDiscovery easier for you and your team, allowing you to concentrate on what matters most—expanding your business. Our unwavering dedication to security and support empowers your team to excel in today’s rapidly changing digital landscape, ultimately fostering a culture of innovation and growth.

The Barracuda Email Security Gateway delivers comprehensive defense against various incoming threats such as malware, spam, phishing, and Denial of Service attacks, thereby preserving business operations from email-related disruptions. With its flexible and robust policies, it meticulously enforces diverse regulations related to incoming emails. In today's digital landscape, where email is crucial for commerce, any interruption to the email server can significantly impede business activities. Moreover, the Barracuda Email Security Gateway includes a Cloud Protection Layer at no additional charge, enabling email spooling for up to 96 hours and allowing for traffic redirection to alternative servers if required. To enhance the protection of sensitive data, it utilizes advanced encryption technologies that block unauthorized access from external sources. Additionally, the outbound filtering and quarantine functionalities ensure that all outgoing communications comply with the company's data loss prevention measures. This thorough strategy not only protects against external threats but also strengthens internal compliance protocols, making it an indispensable asset for any organization. By integrating such a multifaceted approach, companies can maintain their reputations and operational integrity in an increasingly perilous cyber environment.

Protect the integrity of Microsoft Office 365, Google G Suite, and in-house email systems by deploying the industry's most effective email security solutions. Safeguard users from various threats, including spear phishing, credential compromise, and ransomware, by implementing Email Threat Isolation techniques. Address common email vulnerabilities such as spear phishing, ransomware, business email compromise, and spam with strong protective measures. Thwart spear phishing attempts through a layered defense system that includes threat isolation, spam filtering, advanced analytics, and user training initiatives. Shield against the latest ransomware threats by utilizing sophisticated content defense methods, sandboxing, and link protection technologies designed to detect new and hidden threats, including zero-day exploits. Counteract business email compromise by using impersonation safeguards, enforcing sender authentication, and applying brand protection tactics. Improve your brand's reputation and reduce risks by automating the enforcement of sender authentication methods like DMARC, DKIM, and SPF with Symantec Email Fraud Protection, which effectively tackles the challenges associated with email security. By adopting these comprehensive strategies, organizations not only protect their communications but also cultivate a security-conscious culture among their users, ultimately enhancing overall organizational resilience against email-based threats. Investing in these solutions is crucial for maintaining secure and trustworthy communication channels.

Efficiently categorize deceptive emails while proactively detecting and isolating questionable URLs. Utilizing big data analytics enables precise classification of mass email communications. This comprehensive solution integrates seamlessly with both Google Workspace and Microsoft 365. Spambrella's Email Security and User Awareness Training technology is trusted by numerous leading security-focused organizations worldwide, spanning various industries and regions. By partnering with Spambrella, you can consolidate your email security strategies and user training initiatives on an international scale. Acting as your dedicated email security team, Spambrella ensures a smooth transition while possessing the technical know-how of other major providers like Symantec.cloud, Mimecast, and MxLogic. To safeguard your email users from potential threats, reach out today to arrange a demonstration with our cybersecurity specialists and enhance your email protection strategy.

LuxSci is dedicated to ensuring the safety of personal information while effectively safeguarding global communications. The company focuses on delivering web and email communication services that adhere to HIPAA regulations. LuxSci develops highly secure and tailored enterprise-level environments and solutions, empowering businesses to meet their unique operational and security requirements effectively. Among the offerings are services like Secure Email, Web, and Forms, which are designed to enhance data protection and facilitate compliance. In addition, LuxSci continuously evolves its services to adapt to the changing landscape of digital security.

In the fast-changing environment of email security threats, growing businesses need a forward-thinking approach that not only tackles existing dangers but also anticipates future risks. Sophos Email harnesses the advanced technology from our well-regarded Intercept X, utilizing deep learning neural networks to effectively counteract zero-day malware and harmful applications. This solution is equipped with the most advanced anti-ransomware strategies available. By implementing behavioral analysis, Sophos Email can identify and mitigate ransomware and boot-record attacks that have yet to be encountered. Furthermore, its time-of-click URL protection assesses the reputations of email links both prior to delivery and at the time of access, successfully blocking elusive, delayed attacks that might slip past other email security measures. Capable of handling millions of emails each day, Sophos Email draws on the latest threat intelligence from the SophosLabs global network, ensuring your email gateway remains steadfast against a constantly evolving array of threats. Thus, businesses can work with increased assurance, backed by cutting-edge technology designed specifically for the challenges of today and tomorrow. In summary, the proactive measures provided by Sophos Email not only safeguard current operations but also empower organizations to embrace growth without compromising security.

Approximately one-third of businesses that experience a data breach see a reduction in revenue, with email consistently being the most targeted avenue for attacks. Safeguard your email systems with ClrStream, a thorough security and continuity solution compatible with platforms like MS Exchange, Office 365, MDaemon, Postfix, Postmaster, and Zimbra. Alarmingly, 88% of organizations experience data loss, with email often being the leading cause of these incidents. ClrStream operates as an email scrubbing service that protects against Malware, Ransomware, Viruses, and Spam, while also ensuring low latency for email delivery and reducing the rate of false positives. This solution serves as an external safeguard against DDoS attacks, providing an additional layer of security. Additionally, it offers email continuity when the main mail server is down or unreachable, incorporating built-in redundancies and scalability that eliminate the need for a mail parking service. As a cloud-based SaaS solution, ClrStream not only helps reduce bandwidth congestion but also streamlines management duties for organizations. By implementing this powerful solution, companies can significantly bolster their email security and enhance their ability to operate smoothly under adverse conditions. In today's digital landscape, investing in such protective measures has never been more crucial for maintaining trust and reliability with clients.

ePrism offers unparalleled email security designed to defend against both external and internal risks such as spam, viruses, spyware, and phishing attacks. Additionally, it safeguards against identity theft and other harmful content. Our solutions feature top-tier inbound and outbound spam filtering, policy categorization, and seamless automated directory integration within a hosted SaaS framework that can be set up instantly without requiring any hardware or software installation. Our team of technical specialists at EdgeWave actively monitors and manages threats to ensure they do not infiltrate your internal servers. Among the standout features are advanced threat protection, intelligent threat management, data loss prevention, compliance measures, disaster recovery options, detailed policy controls, account management capabilities, and comprehensive visibility and reporting tools. Furthermore, clients can enhance their security through optional add-ons such as ThreatTest for anti-phishing and incident response, Email Continuity services, email encryption solutions, email archiving, and data loss prevention (DLP) capabilities to ensure a robust defense against potential threats.

Enable your teams to excel in a demanding digital environment by enhancing their productivity, improving security, and ensuring adherence to compliance standards. With Secure Cloud, you can boost operational efficiency, reinforce your security protocols, and strengthen compliance initiatives, all while reducing the risks tied to human mistakes and security threats. The implementation of continuous and automated threat detection, alongside proactive risk management strategies, guarantees an agile response to constantly changing dangers. Our premium offerings encompass email encryption, secure file sharing, and thorough archiving of business communications across various channels, including email, social media, and instant messaging. Furthermore, our dedicated support team is always on hand to help navigate the intricate interplay of personnel, technology, and processes. The combination of automatic email encryption and strong data loss prevention strategies provides significant peace of mind for both employees and executives. Protect your organization by counteracting malware, ransomware, and other advanced threats that could endanger not only your email communications but also the overall integrity of your business operations. By embracing these cutting-edge solutions, you are not only securing your assets but also fostering a more robust and adaptable operational framework for the future. This proactive approach can lead to increased trust from clients and stakeholders, ultimately contributing to your organization's long-term success.

Protect your organization from advanced email threats by adopting a cloud email security service, since cybercriminals primarily exploit email as their main entry point. Utilizing a cloud-based solution is vital to safeguard against complex dangers such as targeted phishing attacks, ransomware, business email compromise (BEC), and various email scams. SonicWall's solutions make the management process easier with their user-friendly deployment, administration, and reporting capabilities. As the environment of distributed IT expands, it inevitably introduces numerous vulnerabilities that clever cybercriminals can take advantage of. For those organizations seeking a tailored on-premises option, SonicWall Email Security offers flexibility, available as a fortified physical appliance, an efficient virtual appliance, or a software application. This layered strategy provides thorough protection for both incoming and outgoing emails, effectively addressing sophisticated threats like ransomware. Therefore, prioritizing such stringent email security measures is essential for upholding the integrity and security of your organization's communications, ensuring that sensitive information remains protected from potential breaches. Additionally, staying ahead of evolving threats is key to maintaining trust and resilience in your organization's operations.

Enhance your security protocols with XGen™ security, an advanced software solution crafted to address the full range of current and future threats. Unlike traditional, standalone security measures that often operate in silos, XGen™ security brings together various defense tactics, creating a unified and synergistic strategy that protects your organization from potential risks. This comprehensive approach not only fortifies your defenses against existing dangers but also prepares you for new challenges, significantly boosting your overall cybersecurity resilience. By adopting such a multifaceted system, organizations can achieve a higher level of protection and adaptability in an ever-changing threat landscape.

Email remains the cornerstone of communication for businesses, but this essential role also makes it a prime target for cyber threats, with attacks becoming more frequent and sophisticated. As companies shift towards utilizing cloud-based email platforms like Microsoft 365 and Google G-Suite, they encounter significant challenges in securing their email interactions. Unfortunately, the built-in security measures of these services frequently fall short in safeguarding against a variety of threats, protecting sensitive data, and fulfilling compliance obligations. In response, FortiMail, a secure email gateway solution by Fortinet, provides a comprehensive, multi-layered approach to efficiently manage both incoming and outgoing email traffic. Known for its dependability, Fortinet offers a wide range of security solutions that include identity management and advanced threat protection, all seamlessly integrated within its Security Fabric to ensure holistic protection for enterprises. This extensive capability empowers organizations to confidently manage the intricate challenges of email security, ultimately fostering a safer communication environment. As the landscape of cyber threats continues to evolve, investing in robust email security measures has never been more critical for maintaining operational integrity.

Organizations need a simple, effective, and cost-efficient email encryption solution to meet regulatory requirements and protect sensitive information. Forcepoint's email encryption technology is policy-driven, ensuring secure email communication without the typical barriers of high costs and complexity. It simplifies administration by eliminating the need for complicated key management or additional hardware, making it accessible for various organizations. Furthermore, its integration with Forcepoint Email Security and Forcepoint Data Loss Prevention (DLP) allows for the examination of encrypted emails, identifying potential malware and content violations. This holistic approach enables organizations to visualize risks associated with different events, streamlining the detection of potential threats from both outside and within the company. In addition, it provides automatic training for employees to help them identify phishing attempts and strengthens their grasp of critical email best practices, thus creating a safer communication landscape. This multifaceted strategy not only bolsters security measures but also cultivates a culture of awareness among employees regarding their email correspondence. Ultimately, the combination of robust encryption and employee education leads to a significantly more secure organizational environment.

MailGate provides a range of security levels that can be utilized individually or in combination to reduce risks at the Demilitarized Zone (DMZ) and inside the organization’s network, while also protecting the integrity of both incoming and outgoing email communications across content and network layers. Additionally, MailGate seamlessly integrates with your existing infrastructure, making it unnecessary to rely on a specific browser or operating system, which empowers you to strengthen your security practices as your needs change without requiring modifications to your current systems, applications, protocols, or user experiences. This versatility not only facilitates a prompt response to new threats but also guarantees that your organization maintains strong defenses consistently, ensuring ongoing safety in an ever-evolving digital landscape. By adapting to the shifting security landscape, MailGate reinforces your organization's resilience against potential vulnerabilities.