Best Email Security Software for Linux

SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted email. We provide easy-to-use yet advanced email security for businesses, smbs and MSPs that are Office365 friendly. SpamTitan - Premium functionality included: • CEO Impersonation protection • Phishing/ Spear phishing protection • Link analysis • Full Sandboxing • Zero Day Attacks protection • Mail Spooling • Spoofing protection • Malware and Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Fully multitenant environment • Ability to rebrand the entire UI • Full REST API: • Comprehensive support and set up docs Try a FREE, fully supported trial of SpamTitan Email Security today.

An advanced shield against phishing, ransomware, and evolving email-based threats. Working in harmony with your existing systems, our solution enhances your defences, whether deployed on cloud or on-premises.

Mailfence is an encrypted email service that offers OpenPGP based end-to-end encryption and digital signatures. Mailfence comes with a plethora of features that boost collaboration without compromising security and convenience. Mailfence documents allow you to safely store and edit documents, you can also share docs with your team with the push of a button. Mailfence calendar will keep your tasks, meetings, and events all in one secure place. Mailfence contacts will store your contacts and it will give you the ability to create mailing lists to maximize efficiency. We designed Mailfence to be a fully interoperable suite, which means you can synchronize Mailfence with most services out there. Mailfence business offers fully customizable whitelabel versions of the Mailfence interface. To put the cherry on top, Mailfence donates 15% of revenues of PRO subscriptions to IFF and EDRI to bolster the fight for Online privacy.

Zivver is the effortless, smart, secure digital communications platform powering the next generation of secure digital communications. Trusted by over 5,000 organizations globally, Zivver prevents data leaks caused by human error and ensures compliance. Zivver seamlessly integrates with all major email clients including Gmail, Outlook, and Microsoft 365 and features unparalleled zero-keys encryption, with smart features such as contextual machine learning powered business rules. Zivver allows anyone to share large files up to 5TB securely via their existing email client. Zivver is fully compliant with all leading data security standards, including ISO 27001, NTA 7516, GDPR, HIPPA.

Secure, enterprise-style email, calendar & collaboration without the high cost. Kerio Connect delivers all the features and functionality for collaboration and messaging solution without the complexity and high price tag of other systems. Email is integrated with shared calendars and scheduling, contacts management, tasks, notes, shared and public folders, and instant messaging. Synchronize messages by direct push to your choice of mobile device via Microsoft ActiveSync. Instant Messaging is XMPP-compatible and can be used from various 3rd party chat/IM applications on desktop and mobile phones. You can install Kerio Connect in 10 minutes and users can be up and running in just 10 minutes more. Kerio Connect can be deployed on-premises or in partner-hosted cloud environments. Deploy for users on Mac, Windows, or Linux; plus full support for Outlook (Windows and Mac) and many other IMAP or POP compliant email clients.

Secure email for everybody. Tutanota is the world's most secure email service, easy to use and private by design. Sign up for free to take control of your mailbox. With end-to-end encryption and 2FA, your emails have never been more secure. The built-in encryption guarantees that your mailbox belongs to you: Nobody can decrypt or read your data. Tutanota is open source so security experts can verify the code that protects your emails. Our Android app is Google-free making Tutanota the best open source email service. With apps for iOS and Android, your secure emails are available anytime. Our fast web client & fully-featured apps make sure encrypted emails are a pleasant experience. We take your email needs seriously by offering you a secure email service free from advertisements. We work around-the-clock to bring you an encrypted email service that lets you focus on the important things. From our clear and minimalist design to whitelabel customizations.

Guardian Digital secures against email threats like phishing, zero-day exploits and ransomware attacks that define the modern threat landscape email users face every day. We believe email security is business security, as greater than 90% of all cyber attacks originate from an email. The most effective email protection is delivered through a purpose-driven solution designed to close critical security gaps in Microsoft 365 and Workspace, coupled with the expert setup, ongoing remote system management and accessible support required to improve IT security. With real-time cybersecurity business insights, we help you understand what your risk profile is today, and protect you from the dangers that all businesses face. EnGarde Cloud Email Security - Key Features: • Phishing, spoofing & impersonation protection • Link & file analysis • Zero-day attack protection • Malware & Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Comprehensive management & support service

All-in-one security with 1-click resolve that protects your entire business. A unified threat protection solution designed to bring you cutting-edge, holistic defense with zero drain on your IT resources. Our AI anticipates risk, then proactively identifies and addresses issues automatically, saving you valuable time. Keplersafe is the complete solution that makes it easy to be compliant for mid-market businesses with any sized IT or security team by helping to ensure you're protected according to best practices and accepted industry standards. The Keplersafe platform is built on the principle of holistic, non-disruptive security. Our platform employs innovative AI technology and behavioral analysis to assist businesses in staying secure and compliant, without IT teams having to worry, investigate or fix issues themselves. Keplersafe is based in New York City, with Sales and R&D offices around the globe.

RMail® is the e-security platform by RPost®, a global leader since 2000. RMail specializes in elegantly easy to use email encryption for privacy and compliance, e-signatures, legal e-delivery proof, secure file sharing, email impostor protection, document rights management, and AI-infused services to prevent data leaks and human e-security errors. RMail’s transmission e-security services are most often used by businesspeople or business systems that send important, sensitive, or consumer-regulated information. These RMail services are generally applied to those messages where the sender needs functionality beyond standard email in terms of (a) easier to use and more automated email encryption for privacy compliance, (b) returning a verifiable proof record of who said what to whom by email, (c) assurance and peace of mind related to delivery and open status of important and time-deadline email, (d) need a timestamped proof of content delivered, (f) need to share large files securely.

Cryptshare is innovation to protect your information when most at risk. We all need to send messages and data in our daily business. However, we face many limitations, as soon as data is in transit: 1. Protection of data 2. File size limitations Our solution solves these in a very effective and user-friendly way. It brings many other benefits including: *Detailed audit trail *Compliance with central data protection regulations *Great potential for automating business communication *It is also inexpensive, easy to implement, and accessible from any kind of device with a browser. Cryptshare complies with ISO 27001 and GDPR. Cryptshare keeps your information secure all the way.

EmailAuth® is a TIER 1 OEM and a market leader in Email Authentication. Available 100% on-premise, or in-country cloud (local cloud) or on AWS/AZURE/GCP globally - We make it easy to unleash the power of email authentication. It is an anti-spoofing, anti-impersonation, and anti-phishing platform that ensures that no one can abuse your domains online. If anyone in the world spoofs your domains, EmailAuth collates data from all across the world to ensure that even a single unauthorized email is caught and rejected by global recipients of the world. It even extracts the IP of the sender, so this threat intelligence can be used to block the attacker across your cyber security fabric (SOAR capable). #StopGettingPhished #BeSpoofProof

Smartlockr is a people-centric data security platform to easily enable secure email and file sharing for an entire organization. Smartlockr prevents data leaks by keeping user-friendliness in mind with everything we do. By eliminating the human error, we ensure your workforce is your strongest asset in preventing data leaks. Smartlockr can be customized for each organization, so that every employee can continue to work with the (email) systems they are used to. Smartlockr can be used with almost every operating system and device. It is available as a plug-in for Microsoft 365 (Outlook), it can be integrated into existing systems and an SMTP relay service can be used too. Even a combination is possible if required. Smartlockr can also be used to securely send and receive large files of up to 5 TB. Smartlockr is compliant with all privacy regulations and security standards like GDPR, ISO, NTA 7516.

Hexamail Guard is your ultimate defense against email-based threats. With an array of advanced security features, it ensures that your inbox remains secure and your business stays protected. Protect your email infrastructure with our innovative multi-layer filtering technology. Secure your business communications, enhance productivity, and achieve peace of mind with Hexamail Guard. Intelligent Threat Detection:Hexamail Guard employs cutting-edge algorithms to proactively identify and block spam, viruses, phishing attempts, and other malicious content. Rest easy, knowing that only legitimate emails reach your employees' inboxes. Real-time Threat Analysis:Stay one step ahead with Hexamail Guard's real-time threat analysis. Our system continuously scans incoming emails for emerging threats, ensuring prompt detection and response to evolving security risks. Customizable Rule Sets:Tailor Hexamail Guard to your specific security needs.

SpamTitan Plus Anti-Phishing is an AI-driven email protection solution that provides “zero-day” threat protection and intelligence. Spam Titan Plus provides 100% coverage of ALL current market leading anti-phishing feeds, 1.5X increase in unique phishing URL detections and has 1.6X faster phishing detections than the current market leaders. With real-time continuous updates providing SpamTitan Plus with 10 million new, never-before seen malicious URLs a day. Book a SpamTitan Plus demo Today.

ESET Protect Advanced is a comprehensive cybersecurity solution designed for businesses of all sizes. It offers advanced endpoint protection against ransomware, zero-day threats, and sophisticated attacks with ESET LiveSense technology. It includes full disk encryption for legal compliance and data protection. The solution features proactive cloud-based threat defense using adaptive scanning, machine learning, cloud sandboxing, and behavioral analysis to prevent new threats. Mobile threat defense secures Android and iOS devices with antimalware, anti-theft, and mobile device management. It also provides cloud app protection, mail server security, and vulnerability and patch management. Extended detection and response (XDR) enhances threat detection and response, while multi-factor authentication adds security. The solution offers single-pane-of-glass remote management for visibility into threats and users, along with advanced reporting and custom notifications.