Best Free Email Security Software of 2025

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.

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.

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.

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.

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.

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.

XgenPlus is the most advanced enterprise email solution. Communicate and collaborate with it. It is the first IDN Email Server to provide EAI (Email Address Interization), i.e Linguistic Email Address, like (Email address written in Hindi). It is an email management software that can be used by any enterprise, SME, PSU, or government. department. It supports all the basic features like POP, IMAP and webmail, calendars, contacts, SMS, scheduling and security. Key Features IDN Email - The only internationalized domain name email hosting server Policy for auto archival and mail retention Merge / de-merge email account Group Mail with a Tracking Report Broadcast email Schedule Email / SMS & Other... Benefits: Reliable - 99.99% uptime Scalable: Flexible to meet the needs of your organization Robust Security: Inbuilt Antispam software Live Chat, On-Call, and Offline Support Available 24x7 Easy Data & Administrative Control Better Storage

PreVeil uses end-to-end encryption in an entirely new way. Protect your email and files from phishing, spoofing and BEC. It's easy for users. Administrators will find it easy. PreVeil provides enterprise users with an easy-to use encrypted email and encrypted cloud storage to protect their important emails and files. PreVeil employs the highest standard of encryption to protect data. PreVeil also offers a "Trusted community" that allows employees to communicate with contractors, vendors, and other third parties. Employees can communicate and share information with each other without worrying about being phished or spoofed, falling prey to BEC, or having their admins compromised.

Secure email for everyone. Tutanota, the most secure email service in the world, is easy to use and private. Register for free to get control of your mailbox. Your emails are now more secure than ever thanks to 2FA and end-to-end encryption. Your mailbox is protected by the built-in encryption. Nobody can read or decrypt your data. Tutanota's code is open-source, so security experts can verify it. Tutanota's Android app is Google-free, making it the best open-source email service. Your secure emails are always available with apps for Android and iOS. The web client is quick and fully-featured apps ensure encrypted emails are pleasant experiences. We are serious about your email needs and offer a secure email service that is free of advertisements. We work round-the-clock to provide you with an encrypted email service that allows you to focus on the important things. We offer whitelabel customizations and a clear, minimalist design.

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.

Secure email communication allows you to comply with HIPAA & GLBA compliance standards. Protected Trust Email encryption is now available at Send It Secure by Protected Trust. Protected Trust Email Encryption is a name you may recognize, or Protected Trust. We believe it is time to change the brand of our email encryption product. Our company has expanded and our product offerings have grown. The product that the market has come to trust is our new brand. We welcome a better user experience and a product that meets your needs. We are recognized as the best encryption solution for secure data exchange. We value your trust and protect your data. We are pleased to present our updated email encryption solution, "Send It Secure by Protected Trust".

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.

In order to reach their target, 30% of emails fall through the cracks and end up in customers' spam folders. This is why you need the best email delivery system. The SendForensics Deliveryability Score is a unique predictive model of an email's ability reach any given mailbox. To put it simply, it is a measure of an email's 'quality' in terms of how it will be perceived by global filtering-systems/ISPs and even human recipients themselves. The Missing Metric. SendForensics EDS automatically analyzes all data to determine the most significant cause(s) of concern.

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.

Increase your email deliverability by blocking malware and phishing attacks! DMARC Analyzer will help you to prevent brand abuse and scams, as well as gain insight into your email channel. DMARC is an email validation system. DMARC was created in collaboration with Google, Microsoft, and Yahoo! DMARC gives organizations insight and control over their email channels. DMARC can be used by organizations to protect their brand against phishing and spoofing attacks. DMARC Analyzer, one of the pioneers in DMARC, has been supporting customers since 2012's introduction of the DMARC standard. DMARC Analyzer is a user-friendly DMARC analyzing tool that acts as your expert guide and helps you move towards a rejected policy as quickly as possible. DMARC Analyzer is a SaaS service that allows organizations to manage complex DMARC deployments. 360deg visibility across all email channels is provided by the solution. It is made as simple as possible.

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.

Secure Email Gateway is an enterprise antispam and threat prevention system. It uses a sophisticated array anti-virus scanners, spam filters, and content analysis engines to stop unsolicited mail from ever entering your network. Employee security needs are different. Different security levels may be required for different employees, such as those in finance or sales. Dome Anti-spam allows you to create different types of profiles and set different restrictions. Containment protects against the latest forms of ransomware and zero-malware as well as other advanced threats. The Valkyrie file verdict system analyses unknown files. The attachments are openable, executable and can be used by users with zero risk of infection. Comodo's unique containment technology means that any risk is fully contained before reaching its end point. This ensures that there is no risk of infection from new malware.

Firefox Relay email aliases hide your real email address and forward emails to your inbox. You can now only receive the emails you wish to receive in your inbox. Register with Firefox to get started. To protect your email inbox and identity, you can use Share Relay email aliases to replace your real email address. Relay icons will appear on sites that ask for your email address as you browse the internet. Register to the Relay dashboard and keep track of all the aliases that you have created. Relay will forward all messages to your email address. You can block spam and unwelcome messages from an alias or delete it right from your dashboard.

Vade is a global leader for predictive email defense. We protect 1 billion mailboxes across 76 countries. MSPs and small businesses can protect their Microsoft 365 users against advanced email security threats like spear phishing and phishing. SMBs, ISPs, and MSPs all choose Vade's email security products to protect their users from advanced cybersecurity threats like phishing and spear phishing. Our AI-based email security solutions can detect the undetectable, whether we are protecting consumers through top ISPs or businesses through our MSP partners. Block dynamic phishing attacks, which bypass traditional security measures. Block targeted spearphishing and business email compromise attacks. Block zero-day and polymorphic evasive malware attacks.

INKY is an award-winning cloud based email protection software. It protects businesses against phishing attacks, as well as blocking spam and malware. INKY uses domain-specific machine-learning and computer vision to identify zero-day phishing emails and block them from reaching legacy email systems. For suspicious emails, warning banners are included in the email. In minutes, integrates into Office 365 across the organization. Safe/Unusual/Malicious warnings let users know how to treat the email. Our advanced dashboard provides complete visibility and tracking of the threats being blocked. INKY's email security software inserts user-friendly warnings into emails. This provides specific guidance to educate and protect your users. Safe/Unusual/Malicious warnings with details guide the user to take a closer look or proceed cautiously. Report an email with just a click is a favorite feature of our clients.