List of the Top 15 On-Prem Email Security Software in 2025

Managing Office 365 has never been simpler. With AD Users & Computers, you can oversee everything without the hassle of Exchange on-premises. Easy365Manager seamlessly merges Office 365 and Active Directory management, allowing you to avoid logging into web consoles or executing PowerShell commands. This tool introduces two additional tabs for user properties within AD Users & Computers, enabling management of Exchange Online mailboxes directly from AD user properties. This includes handling intricate configurations such as calendar delegation, which typically necessitates PowerShell knowledge. By utilizing Easy365Manager, first-level administrators can increase their efficiency, significantly decreasing the volume of issues that need to be escalated to senior staff. Moreover, installation is straightforward; it can be set up on any PC or server equipped with AD Users & Computers without requiring any server component, service, AD Extension, or custom security protocols. In less than two minutes, Easy365Manager can be installed and configured, providing immediate relief from the complexities of hybrid Office 365 management. Additionally, this tool enhances productivity while simplifying the administration of user accounts across platforms.

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.

Discover reliable, enterprise-grade email, calendar, and collaboration solutions that fit your budget. Kerio Connect presents a wide array of features for communication and teamwork, eliminating the complexities and high expenses typically linked to other services. It offers an integrated experience that combines email with shared calendars, scheduling tools, contact management, tasks, notes, shared and public folders, along with instant messaging capabilities. Users can easily sync their emails to their favorite mobile devices via Microsoft ActiveSync. The Instant Messaging functionality supports XMPP, making it compatible with various third-party chat and IM applications across both desktop and mobile platforms. Setting up Kerio Connect is a breeze, taking only 10 minutes, after which users can begin working almost immediately. This solution can be implemented on-site or through cloud environments hosted by partners, catering to users on Mac, Windows, or Linux systems. Additionally, it ensures full support for Outlook on both Windows and Mac, along with compatibility for numerous other IMAP or POP-compliant email clients, providing flexibility and smooth integration for every user. Embrace a collaborative experience that is straightforward and efficient, allowing your team to focus on what truly matters.

Kevlarr offers a robust and all-encompassing DMARC monitoring and management platform tailored for Managed Service Providers (MSPs). Designed specifically for their needs, our system empowers MSPs to streamline their processes effectively. The intuitive dashboard makes it easy to establish and uphold a stringent DMARC Policy, while our advanced AI-driven filters sift through irrelevant data, ensuring that only pertinent information related to spoof emails or attacks is presented. This targeted approach allows specialists to focus solely on the data that truly matters to them or their clients, ultimately saving valuable time. Additionally, our user-friendly wizard walks you through the DMARC management steps, making the process seamless and efficient. Drawing from years of expertise in DMARC management, we highlight the domains requiring immediate attention for each client, prioritizing the most critical issues first. With this comprehensive solution, you can be confident that no important detail will be overlooked, enhancing your overall security posture.

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.

Sending and receiving digitally signed encrypted emails has become simpler than ever before. The Secure E-Mail Gateway (SEPPmail), utilizing its innovative GINA method for spontaneous encryption, is capable of safeguarding email communications for both small and large enterprises at the highest security levels. This solution requires very little effort and is user-friendly for both the sender and the recipient. SEPPmail’s all-encompassing Secure Email solution establishes new benchmarks in email communication that adheres to GDPR compliance. Recognized as a premier email encryption and signature solution, SEPPmail encompasses all essential features to protect sensitive data transmitted via email, while also ensuring the sender's authenticity and maintaining the confidentiality and integrity of the message. Additionally, the modular architecture of this secure email gateway enables customization to cater to specific customer requirements and allows for effortless expansion. As such, businesses can confidently rely on SEPPmail to enhance their email security protocols.

DocsCorp is the preferred choice for document management experts seeking software that enhances their efficiency and simplifies their tasks. With a strong global presence, we serve over 500,000 users across 65 nations. Our diverse range of products includes tools for document creation, email recipient verification, metadata cleaning, and document comparison, along with desktop, server, or cloud-based PDF creation and conversion solutions. Our software integrates seamlessly with leading enterprise content management systems, which boosts productivity and streamlines workflows. We provide organizations with both on-premises and cloud integration options to suit their needs. Our focus is on supporting document-centric industries by helping them effectively manage their most vital resource - documents. Our clientele spans various sectors, including Government Departments, Legal Services, Financial Services, and Technology companies, all of which rely heavily on efficient document management. In addition, we continually strive to innovate and improve our offerings to meet the evolving demands of these industries.

CB Exchange Server Sync facilitates the secure transfer and synchronization of data between Exchange Servers, streamlining the process for multiple Outlook accounts hosted on either Exchange Server or Office 365. This tool can be tailored to fit the specific requirements of your business, enabling the synchronization of emails, calendars, tasks, contacts, public folders, and other critical information. Furthermore, it supports the smooth migration of your entire Exchange or Outlook setup to Office 365 or different versions of Exchange starting from Exchange 2010 SP1 onward. When used in conjunction with other solutions, it enhances security and functionality, offering a comprehensive approach to data management. Notably, pairing it with CB Super Secure Exchange Server helps protect against unauthorized access by hackers aiming to infiltrate secure networks through Exchange Server. Additionally, integrating Outlook Content Censor allows users to access their Exchange accounts remotely while safeguarding sensitive information by limiting the visibility of attachments, addresses, and signatures. Thus, CB Exchange Server Sync not only simplifies migration but also fortifies overall data security in your organization.

Safeguard your organization against unintentional data leaks with VIPRE SafeSend, an effective and proactive tool tailored for Microsoft Outlook. SafeSend prompts users to verify external recipients and attachments prior to sending emails, which greatly minimizes the chances of sending misaddressed messages and incurring expensive errors. Unlike conventional Data Loss Prevention (DLP) systems that only intervene after emails have been dispatched—placing additional pressure on already stretched security teams to assess and approve them—SafeSend operates in real-time, allowing employees to spot and rectify potential mistakes beforehand. Furthermore, SafeSend meticulously scans outgoing emails and attachments to ensure sensitive information remains securely within your organization's network, delivering an added layer of security. As time progresses, employees will organically cultivate improved email practices, promoting a workforce that is more attuned to security concerns. SafeSend is offered in two distinct packages: one aimed at preventing misaddressed emails and another catering to broader DLP requirements. With VIPRE SafeSend, your organization not only minimizes the risk of data leaks but also cultivates a culture of vigilance and responsibility among its members, ultimately enhancing overall data security.

The Accellion secure communication platform effectively mitigates data breaches that stem from external cyber threats. Chief Information Officers and Chief Information Security Officers depend on Accellion to maintain comprehensive oversight, adherence to regulations, and authority over the transfer of intellectual property, personal identifiable information, and protected health information across various third-party communication methods. This encompasses channels such as email, file sharing, mobile applications, enterprise portals, SFTP, and automated inter-business processes, allowing users to confidently select the Accellion button as the most reliable method for sharing sensitive data beyond their organization. Additionally, the Accellion platform provides a range of deployment options, including FedRAMP, hybrid, and on-premise solutions, ensuring that organizations can choose the configuration that best meets their needs. By delivering the necessary security and governance frameworks that CISOs demand, Accellion helps organizations mitigate risks while complying with stringent regulations like NIST 800-171, HIPAA, SOX, GDPR, and GLBA. With a strong track record, more than 25 million users across over 3,000 organizations have benefitted from the protective capabilities of Accellion’s solutions, highlighting the platform's extensive reach and effectiveness in safeguarding sensitive information.

Echoworx stands out as a fully-managed SaaS email encryption solution by providing eight distinct methods for sending secure emails, accommodating nine different authentication methods, and offering support in up to 28 languages, which allows for safe communication across various devices and locations. Among its key attributes are multiple secure mail delivery options, including Web Portal, S/MIME, PGP, Secure PDF, Certificate Encryption, Secure Attachments (such as PDF, Office, and ZIP), as well as TLS with fallback. Additionally, it features a wide array of authentication methods like Full OAuth Access, Self-Registration, SMS, Shared Secret Passphrase, SSO, System-Generated Verification Codes, Passwordless options, and Multi-Factor Authentication (MFA) for enhanced security. Users can also benefit from a complimentary full proof of concept trial (POC) and 24/7 access to expert support, ensuring that assistance is always available when needed. The platform allows for seamless end-to-end deployment and includes options for recalling and tracking secure emails. With extensive branding capabilities and self-service account management, Echoworx is committed to providing a comprehensive and user-friendly email encryption experience. Ultimately, this combination of features empowers organizations to enhance their communication security effortlessly.

Libraesva Email Security serves as a robust defense for your organization against both longstanding and new email threats, guaranteeing that only authentic communications are delivered. It provides superior email protection by integrating cloud email solutions with a secure email gateway, further augmented by Libraesva's unique Adaptive Trust Engine. This innovative engine leverages artificial intelligence to analyze typical behavioral trends within organizations and their members, continually assessing the reliability of business communications and proactively identifying any suspicious activities. In addition, Libraesva Email Security thoroughly inspects all incoming and outgoing messages, effectively detecting and neutralizing advanced malware, phishing schemes, business email compromises, spam, and a variety of other potential hazards. Its exclusive sandboxing technology neutralizes dangerous payloads and active content found in attachments, while its proactive URL analysis examines every link, ensuring users are protected from visiting malicious websites. This comprehensive approach not only safeguards your organization’s communications but also enhances overall cybersecurity resilience.

At EmailAuth.io, which is affiliated with Infosec Ventures, our primary focus is safeguarding your most precious digital asset: your email. We are committed to enhancing your email deliverability, ensuring you receive the highest return on investment from your email campaigns, and fostering trust with your customers, partners, and vendors alike. Our approach goes beyond mere support; we take charge of the entire process! EmailAuth employs a strategy that encompasses the full journey toward achieving the highest level of security for your domains. Our team of security specialists, along with dedicated customer success managers, collaborates seamlessly with you to ensure your needs are met effectively. Together, we work towards a secure and trustworthy email experience for all your communications.

Protect your email infrastructure and users, whether they are hosted on-premises or in the cloud, by implementing Trellix Email Security. This solution is designed to identify and combat sophisticated email threats such as ransomware, business email compromise (BEC), and phishing attacks. With its exceptional detection and response features, you can create a reliable and resilient email system. The platform swiftly pinpoints ongoing threats and provides prioritized alerts, allowing security analysts to take immediate action. Maintain the safety of your email—whether cloud-based or on-premises—by utilizing cutting-edge sandbox technology, artificial intelligence, and machine learning. Furthermore, enhance your security environment by integrating with over 650 Trellix solutions and various third-party products, which can offer essential insights and support a unified security framework. By employing this on-premises solution, you can significantly diminish the chances of breaches while effectively identifying, isolating, and defending against intricate URL and attachment threats. Choose Advanced Threat mode for detecting harmful URLs through custom plug-ins, or opt for Full Hygiene mode to reduce impersonation attempts, BEC, and other vulnerabilities. These comprehensive features empower you to uphold a secure email landscape that is customized to meet the specific requirements of your organization, ensuring that your communications remain safeguarded against evolving threats.

ESET Protect Advanced delivers a robust cybersecurity solution tailored for organizations of various sizes. This platform provides cutting-edge endpoint security to combat ransomware and zero-day vulnerabilities effectively. It features full disk encryption to uphold legal standards and safeguard data integrity. The solution employs adaptive scanning, cloud sandboxing, and behavioral analysis to defend against emerging cloud-based threats proactively. Additionally, mobile threat protection encompasses antimalware and anti-theft measures for both Android and iOS devices. Beyond this, it includes cloud application security, mail server protection, vulnerability assessment, patch management, and comprehensive cloud app safeguards. Enhancements such as multi-factor authentication and extended detection and response (XDR) bolster threat detection and response capabilities. The system offers a unified remote management interface that allows for seamless visibility into threats and user activities. Furthermore, it provides in-depth reporting and tailored notifications to keep users informed of potential risks and system status. This holistic approach ensures that businesses can maintain a strong security posture in an increasingly complex digital landscape.