Best Free Email Security Software of 2025

Guardz is an AI-powered cybersecurity solution that provides MSPs with a platform to protect and insure small and growing businesses from cyberattacks. The platform provides automatic detection and response to protect users, devices, cloud directories, and data. We simplify cybersecurity management to allow businesses to focus on their growth without being bogged down by security complexity. The Guardz pricing model is scalable and cost effective and ensures comprehensive digital asset protection. It also facilitates rapid deployment and business growth.

EasyDMARC is a cloud-based DMARC solution for securing domains and email infrastructure, protecting organizations against phishing attacks, and more: Brand Protection Our email protection SaaS platform stops hackers from sending phishing emails to customers from company names, gaining access to accounts, and stealing personal information. Increased Email Deliverability EasyDMARC informs receiving mail servers that emails are legitimate and authentic, ensuring they’re delivered to the inbox instead of blocked or sent to spam. Visibility Into Cyber Threats EasyDMARC helps to successfully monitor every aspect of your email authentication and enforce effective protection from phishing attacks thanks to its advanced reporting capability. Business Email Compromise (BEC) Protection Most people have seen emails pretending to be from the CEO, CFO, or another executive in their organization. EasyDMARC prevents business email compromise and keeps your company reputation on the highest level․ EasyDMARC’s deliverability tool, EasySender, covers all the aspects of email deliverability. The variety of features on the platform cover email list verification, mailbox warmup, and inbox placement.

PowerDMARC is a robust email security solution that safeguards your brand reputation and email communications from threats like spoofing, phishing, and ransomware. By leveraging advanced technologies such as DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT, PowerDMARC empowers you to protect your email infrastructure. With a user-friendly platform, PowerDMARC simplifies complex configurations, enabling you to easily manage and monitor your email security posture. AI-powered threat intelligence provides valuable insights to proactively identify and mitigate emerging threats. Trusted by over 2000 organizations globally, including Fortune 100 companies and governments, PowerDMARC is your trusted partner in securing your email infrastructure.

Mailfence is an encrypted email provider that uses OpenPGP-based encryption and digital signatures. Mailfence offers a variety of features that allow for collaboration without compromising security or convenience. Mailfence documents allows you to securely store and edit documents. You can also share documents with your team by pressing a button. Mailfence calendar will help you keep track of all your tasks, meetings, events, and other important information. Mailfence contacts will save your contacts and allow you to create mailing lists to maximize efficiency. Mailfence was designed to be fully interoperable. This means that you can sync Mailfence with any service. Mailfence offers fully customizable whitelabel versions for its Mailfence interface. Mailfence donates 15% from PRO subscriptions to IFF or EDRI to support the fight for Online privacy.

odix, a market leader for Enterprise CDR (Content Disarm and Reconstruction), now offers FileWall, a native cybersecurity app for Microsoft Office 365 mailboxes. FileWall™, which is compatible with Microsoft security solutions like EOP and ATP, ensures complete protection against unknown attacks via email attachments. FileWall™, unlike other Microsoft security solutions, doesn't alter or harm any sender-related security capabilities.

Cloudflare is the foundation of your infrastructure, applications, teams, and software. Cloudflare protects and ensures the reliability and security of your external-facing resources like websites, APIs, applications, and other web services. It protects your internal resources, such as behind-the firewall applications, teams, devices, and devices. It is also your platform to develop globally scalable applications. Your website, APIs, applications, and other channels are key to doing business with customers and suppliers. It is essential that these resources are reliable, secure, and performant as the world shifts online. Cloudflare for Infrastructure provides a complete solution that enables this for everything connected to the Internet. Your internal teams can rely on behind-the-firewall apps and devices to support their work. Remote work is increasing rapidly and is putting a strain on many organizations' VPNs and other hardware solutions.

PreVeil revolutionizes end-to-end encryption, offering robust protection for organizations' emails and files against threats like phishing, spoofing, and business email compromise. The platform is designed to be user-friendly for employees and straightforward for administrators. With PreVeil, enterprises gain access to a secure and intuitive encrypted email and cloud storage solution that safeguards critical communications and documents. Utilizing top-tier end-to-end encryption, PreVeil ensures that data remains secure throughout its lifecycle. Additionally, the platform features a “Trusted Community” that facilitates safe communication among employees, contractors, vendors, and other external parties. This innovative feature allows users to share sensitive information confidently, knowing they are protected from common cyber threats. Ultimately, PreVeil empowers organizations to maintain a high level of security while fostering a collaborative environment.

Tuta provides a privacy-focused email service that guarantees end-to-end encryption, securing all your data from unauthorized access. Featuring quantum-safe cryptography, Tuta protects your communications with the highest standards of security. Its intuitive apps for Android, iOS, and desktop ensure an easy and efficient experience for users, with no ads and complete privacy. Tuta also supports custom domains for professional use and remains committed to sustainability by using 100% renewable energy for its operations.

Security Gateway's email threat detection technology was developed by MDaemon Technologies. This email industry pioneer has been protecting email servers against viruses, spam, phishing and other threats for more than 20 years. Our expertise is trusted by companies to keep their email communications safe. We protect all email platforms, including Microsoft Exchange, Office 365, and other. Our team of email security specialists will take the hassle out of managing your company’s email security. Security Gateway employs the most up-to-date email threat detection technology and policy enforcement tools in order to ensure good emails flow to and from your users. Security Gateway cloud service is easy to deploy, so you can focus on other important tasks. Check out this video to see some of the Security Gateway features.

Zivver is the digital communications platform that powers the next generation of secure digital communication. It is simple, smart, and secure. Zivver is trusted by more than 5,000 organizations worldwide. It prevents data leaks from human error and ensures compliance. Zivver seamlessly integrates to all major email clients, including Outlook, Gmail, and Microsoft 365. It features unrivalled zero-keys encryption and smart features like contextual machine learning powered business rule generation. Zivver allows you to securely share large files upto 5TB via your existing email client. Zivver is fully in compliance with all major data security standards including ISO 27001 and NTA 7516, GDPR and HIPPA.

Kevlarr provides the most comprehensive DMARC monitoring & management solution for MSPs. Our platform is purpose-built and empowers MSPs. Our dashboard simplifies the process of setting up and maintaining a strict DMARC Policy. Our AI-driven filters eliminate all irrelevant data. Our AI filters can filter out data relating to spoof emails or spoof attacks. You only need to pay attention to the data that you, or your customer, actually control. This can save your specialists time. Our wizard guides you step-by-step through the DMARC management process. This solution is the result of our years of experience and knowledge in DMARC management. We zoom in on the domains that need your attention for each customer. We start with the most pressing issues. You can be sure you won't forget anything.

Send and receive encrypted emails that comply with HIPAA and GLBA requirements. Protected Trust Email Encryption has been rebranded as Send It Secure by Protected Trust. You might remember us as either Protected Trust Email Encryption or simply Protected Trust. With the expansion of our email encryption capabilities and an increase in our service offerings, we felt it was the perfect moment to introduce a new identity for our email encryption product. This rebranding aligns with our commitment to providing a trusted product in the market, and we are thrilled to enhance your experience with improvements tailored to your needs. Acknowledged as a leading solution for the secure transfer of sensitive information, we prioritize your trust and the safeguarding of your data. We're eager to share our refreshed email encryption solution, Send It Secure by Protected Trust, and look forward to supporting your secure communication needs more effectively than ever before.

Palisade is the only DMARC automation solution designed specifically for MSPs. We make managing email security and compliance straightforward by allowing MSPs to oversee multiple domains with ease, simplify authentication processes, and transform detailed DMARC reports into actionable strategies. All through a single pane of glass. Boost efficiency, lower operational costs, and unlock new revenue opportunities while ensuring exceptional email security for your clients.

Founded in 2012 by a primary author of the DMARC specification, dmarcian is dedicated to upgrading the entire world’s email by making DMARC accessible to all with superior tooling, educational resources, and knowledgeable support. Used by thousands and recommended by support teams around the globe, our DMARC Management Platform grants you visibility into and control over how your email domains are used. Our platform provides actionable insights and alerts for organizations of any size to deploy DMARC and its supporting technologies of SPF and DKIM, visualize email delivery data, and manage a secure domain services infrastructure. Rectify email security vulnerabilities, improve domain and brand reputation, and meet the growing demand of DMARC compliance requirements with our best-in-class offerings.

Encyro offers secure file storage, encrypted email and electronic signatures. Encyro's award-winning design makes it easy for you and your clients. Clients don't have to sign up for portal accounts. File sharing and encrypted messaging Encyro allows you to send directly to any email address. Encyro protects your data both during transmission as well as storage to ensure that you are in compliance with HIPAA and other compliance standards such as the GDPR, FINRA and SOX. Securely receive via your custom-branded upload page. Clients do not need to log in or go through additional steps. Electronic Signatures Encyro esignatures are designed for remote signing to protect your transaction. You can control the login options as well as the type of signature to ensure that only the right person is signing. Encyro offers custom branding, automated reminders, re-usable templates for e-sign, and re-usable Encyro e-sign templates. Access codes that comply with NIST-8006363 can be sent by SMS or text for additional security.

Xeams, a secure and powerful complete email server for Windows, Linux Solaris, MacOSX, and other flavors UNIX, is available. Xeams supports SMTP and POP3, as well as IMAP. It has a powerful spam filtering engine which eliminates up to 99 percent of junk mail upon installation. It is very user-friendly because it offers a flexible approach to email.

Make the smartest investment today to reduce email security threats. Get a comprehensive email security solution for small businesses at small business pricing. Cybercriminals are targeting CEOs and CFOs in every industry, as well as HR, Accounting, and HR departments. Office 365 has very limited protection options to prevent impersonations, email fraud, and phishing. You can only create so many custom transport rules to block domains and protect against employee impersonations. PhishProtection is compatible with every email server, device, and smtp service. We can protect you no matter where you are, whether you're on your phone, outlook, or any other email client. It provides the best security for both Android and iOS devices.

Typically, around 30% of emails fail to arrive at their intended recipients, often landing in spam folders instead. You can recover this lost income by utilizing an advanced email deliverability system. The SendForensics Deliverability Score offers an innovative, predictive assessment of an email's likelihood of reaching any specific inbox. In essence, it evaluates the 'quality' of an email based on how it will be viewed by various global filtering systems, ISPs, and even the recipients themselves. This score is indeed the essential metric that has been missing. By analyzing everything from email content and sending infrastructure to reputation, engagement history, and external sources like Microsoft SNDS*, SendForensics EDS efficiently identifies the primary issues of concern during each assessment, ensuring that users can address potential pitfalls effectively. This comprehensive approach empowers businesses to enhance their email strategies and improve overall deliverability rates.

RMail®, the e-security platform from RPost®, is a global leader in 2000. RMail is a specialist in elegantly simple email encryption for privacy, compliance, legal e–delivery proof secure file sharing, email rights management, email impostor protection and email encryption. RMail's transmission security services are often used by businesspeople and business systems that need to send sensitive or consumer-regulated information. These RMail services can be used for messages that require additional functionality beyond standard email. They include (a) an easier-to-use and more automated email encryption to ensure privacy compliance; (b) a verifiable proof record of who sent what email to whom; (c) assurance and peaceof mind in relation to delivery and open status email of important and time-deadline emails, (d) need to have a timestamped proof that content was delivered; (f) the need to securely share large files.

Enhance your email security by blocking malware and phishing threats while boosting your email deliverability! Safeguard your brand from misuse and scams while gaining comprehensive visibility into your email operations using DMARC Analyzer. DMARC, an email validation framework, was developed collaboratively by tech giants like PayPal, Google, Microsoft, and Yahoo!. By implementing DMARC, organizations can gain valuable insights and exert control over their email communications. This tool enables businesses to protect their identities from phishing and spoofing attempts effectively. DMARC Analyzer, a leader in the field, has been assisting clients since the DMARC standard was established in 2012. Their user-friendly software simplifies DMARC analysis and serves as an expert consultant, helping you transition to a reject policy as swiftly as possible. With a SaaS offering, DMARC Analyzer empowers organizations to navigate the complexities of DMARC deployment effortlessly. The solution ensures complete visibility and governance throughout all email avenues, making the process as straightforward as possible for users. Ultimately, DMARC Analyzer is dedicated to enhancing your email security and operational efficiency.

WikiLocks works in the same way as you do. It works within your most used applications. Select the data you wish protect, then assign access to individuals and groups. Finally, distribute the newly protected document. No matter how the document is accessed, copied or pasted, protection will continue to follow it throughout its lifecycle.

M365 Manager Plus is a comprehensive Microsoft 365 tool that can be used to report, manage, monitor, audit, and create alerts for critical activities. It is easy to manage Microsoft 365 services such as Exchange Online, OneDrive for Business and Skype for Business from one place. M365 Manager Plus offers extensive pre-configured reports on Microsoft 365. It helps you perform complex tasks such as bulk user management, bulk mail management, secure delegation, and bulk mailbox management. You can monitor Microsoft 365 services 24/7 and receive email notifications about service interruptions. M365 Manager Plus simplifies compliance management with built in compliance reports. It also offers advanced auditing, alerting, and reporting features to help keep your Microsoft 365 setup safe.

The Secure Email Gateway serves as a robust solution for enterprises, employing a complex set of spam filters, antivirus tools, and content analyzers to block unwanted emails from infiltrating your organization's network. Given that security requirements can vary among different team members, it is possible to implement various security protocols tailored to specific roles, such as those in finance or sales. Dome Anti-spam offers the flexibility to create diverse profiles, each equipped with distinct security functions and limitations. Additionally, containment features safeguard against emerging threats like ransomware and zero-day attacks. The Valkyrie file verdict system assesses unfamiliar files, allowing users to access and utilize attachments with complete assurance against infections. Comodo's innovative containment technology guarantees that all potential risks are isolated before they can affect endpoints, thus eliminating any chance of malware infection, regardless of its origin. This comprehensive approach not only enhances security but also instills confidence in employees to perform their tasks without fear of digital threats.

Firefox Relay allows you to create email aliases that shield your actual email address from being publicly accessible, automatically directing incoming messages to your genuine inbox. This feature ensures that you only receive the emails you wish to see. To begin using this service, simply register with your Firefox account. By sharing Relay email aliases instead of your true email, you can safeguard both your inbox and your personal identity. The Relay icon will pop up whenever a website requests your email address while you browse. You can monitor the aliases you've set up by signing into the Relay dashboard. Any messages sent to your alias will be forwarded to your actual email. Should an alias attract spam or unwanted messages, you have the option to block all incoming emails or delete the alias directly from the dashboard, providing you with complete control over your email privacy. This way, you can enjoy a more secure online experience.

Vade stands out as a global frontrunner in predictive email security, safeguarding 1 billion mailboxes across 76 nations. We empower MSPs and SMBs to shield their Microsoft 365 users from sophisticated email threats such as phishing, spear phishing, and malware. Organizations including ISPs, MSPs, and SMBs select Vade's innovative email security tools to defend their clientele and enterprises from these advanced cybersecurity challenges. Our AI-driven solutions are specifically crafted to identify threats that conventional methods often miss. They effectively thwart dynamic phishing attempts that evade standard defenses, as well as targeted spear phishing and business email compromise schemes. Additionally, our technology is adept at neutralizing evasive polymorphic and zero-day malware attacks, ensuring comprehensive protection for all users. With our solutions, businesses can navigate the complexities of email security with confidence and peace of mind.