# Best Email Anti-spam Software - Page 7 ## How Many Email Anti-spam Software Products Does G2 Track? **Total Products under this Category:** 120 ### Category Stats (Jul 2026) - **Average Rating:** 4.46/5 The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** INKY Email Security Platform (+0.86%) - Among all products in this category, INKY Email Security Platform recorded the largest rating increase compared to last month _Last updated: July 26, 2026_ ## How Does G2 Rank Email Anti-spam Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 5,400+ Authentic Reviews - 120+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Email Anti-spam Software ![G2 Grid® for Email Anti-spam Software plotting products by satisfaction and market presence](https://www.g2.com/categories/email-anti-spam/grids.png?focus%5B%5D=30562&focus%5B%5D=112257&focus%5B%5D=115555&focus%5B%5D=118732&focus%5B%5D=25519&focus%5B%5D=15605&focus%5B%5D=129100&focus%5B%5D=127324) Highlighted products: Proofpoint Core Email Protection, Check Point Email Security, Microsoft Defender for Office 365, Abnormal AI, Paubox, SaneBox, Libraesva Email Security, and IRONSCALES. Underlying data: [Grid® JSON](https://www.g2.com/categories/email-anti-spam/grids.json?focus%5B%5D=proofpoint-core-email-protection&focus%5B%5D=check-point-email-security&focus%5B%5D=microsoft-microsoft-defender-for-office-365&focus%5B%5D=abnormal-ai&focus%5B%5D=paubox&focus%5B%5D=sanebox&focus%5B%5D=libraesva-email-security&focus%5B%5D=ironscales) **Sponsored** ### Momentum AMP, formerly Nowcerts Momentum AMP is a modern, cloud-based Agency Management System (AMS) purpose-built for independent insurance agencies. Designed with input from real insurance professionals, Momentum AMP helps agencies streamline operations, automate follow-ups, and improve client communication—all within one intuitive, browser-based platform. Unlike legacy AMS platforms or generic business tools, Momentum AMP is built specifically for the workflows of independent agencies. With AI-powered features to surface key insights, automate tasks, and reduce manual data entry, the platform enables teams to work faster and more efficiently—whether they're focused on new business, renewals, or client service. Momentum AMP includes robust tools for email tracking, texting, task management, automation, and reporting, giving producers and service teams everything they need to stay on top of client needs and close more business. It's fully Mac-compatible and mobile-friendly, ensuring teams can access their work from anywhere, on any device. What truly sets Momentum AMP apart is our unified approach to agency operations. Agencies no longer need to juggle fragmented tools or spend time building workarounds. Instead, Momentum delivers a cohesive experience that simplifies day-to-day tasks, supports collaboration, and empowers users with smart, proactive workflows. With fast onboarding, a clean user interface, and ongoing enhancements based on real-world feedback, Momentum AMP gives agencies the flexibility and power they need to grow—without the complexity of traditional AMS systems. Whether you're looking to improve productivity, enhance client service, or modernize your operations, Momentum AMP delivers the tools and intelligence to help your agency thrive. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1628&secure%5Bchosen_at%5D=2026-07-30T03%3A59%3A39Z&secure%5Bdisplayable_resource_id%5D=599&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=17982&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=17982&secure%5Bresource_id%5D=1628&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Femail-anti-spam%3Fpage%3D7&secure%5Btoken%5D=104f06a455a7d38f9c2776461cf651f3554435a9e980e644c4c71056b28d734d&secure%5Burl%5D=https%3A%2F%2Fmomentumamp.com%2F&secure%5Burl_type%5D=company_website) ### [Deep Discovery Email Inspector](https://www.g2.com/products/deep-discovery-email-inspector/reviews) Deep Discovery Email Inspector detects and blocks ransomware spear phishing emails through advanced analysis techniques for known and unknown attacks. #### Who Is the Company Behind Deep Discovery Email Inspector? - **Seller:** [TrendAI](https://www.g2.com/sellers/trendai) - **Year Founded:** 1988 - **HQ Location:** Tokyo - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=454c2fb5d9ffdec950c31f62cc45f1b76a4b9ce72ef5e5a91b06fad1ee8584b7&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F4312%2F&secure%5Burl_type%5D=linkedin_company_website) 8,040 employees on LinkedIn® - **Ownership:** OTCMKTS:TMICY - **Total Revenue (USD mm):** $1,515 #### What Are G2 Users Discussing About Deep Discovery Email Inspector? - [What is Deep Discovery Email Inspector used for?](https://www.g2.com/discussions/what-is-deep-discovery-email-inspector-used-for) ### [Diadem Advanced Email Anti Spam](https://www.g2.com/products/diadem-advanced-email-anti-spam/reviews) Diadem's Advanced Email Anti-Spam solution is a comprehensive, cloud-based service designed to protect organizations from a wide range of email threats, including spam, viruses, phishing attempts, and malware. By integrating seamlessly with existing email infrastructures, it ensures that inbound and outbound communications remain secure, maintaining both network integrity and company reputation. The solution offers high filtering accuracy with minimal false positives, enhancing overall email reliability. Key Features and Functionality: - Inbound and Outbound Filtering: Effectively filters incoming and outgoing emails to prevent spam, viruses, and malicious attachments from entering or leaving the network. - Advanced Antivirus and Anti-Malware Protection: Utilizes cutting-edge scanning technologies to detect and neutralize threats before they reach the inbox. - High Filtering Accuracy: Employs proprietary IP-reputation systems and multiple content classifiers to achieve nearly 100% filtering accuracy with a very low false-positive rate. - Email Continuity: Ensures uninterrupted email access by queuing messages during server downtimes and automatically delivering them once the server is back online. - Comprehensive Reporting and Management: Provides detailed logs, web-based and IMAP-based quarantine access, and advanced filtering statistics for efficient monitoring and management. - Seamless Integration: Compatible with various mail servers, including Exchange, Zimbra, Postfix, Exim, qmail, and Lotus, and integrates with leading control panels. Primary Value and Problem Solved: Diadem's Advanced Email Anti-Spam solution addresses the critical need for robust email security in organizations. By effectively filtering out spam and malicious content, it safeguards networks from potential threats, reduces the risk of IP blacklisting, and maintains the organization's reputation. The solution also enhances employee productivity by minimizing the time spent dealing with unwanted emails and reduces infrastructure load by decreasing the volume of spam processed by internal servers. Additionally, its fully managed service simplifies email security management, allowing IT resources to focus on other strategic initiatives. #### Who Is the Company Behind Diadem Advanced Email Anti Spam? - **Seller:** [Diadem Technologies Pvt Ltd](https://www.g2.com/sellers/diadem-technologies-pvt-ltd) - **Year Founded:** 2000 - **HQ Location:** Kolkata, IN - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=72163b25aa19be33ca01829066d9aef9dd214c61d9f635f8569831fc1fc1525b&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fdiadem-technologies%2F&secure%5Burl_type%5D=linkedin_company_website) 15 employees on LinkedIn® ### [Elpha Secure](https://www.g2.com/products/elpha-secure/reviews) Elpha Secure offers an integrated cyber protection solution tailored for small and midsize businesses, combining advanced cybersecurity software with comprehensive cyber insurance coverage. This dual approach not only safeguards businesses against cyber threats but also ensures financial resilience in the event of an attack. By embedding proprietary security technology within each policy, Elpha Secure simplifies the process of obtaining and maintaining robust cyber defense, making it accessible and affordable for businesses that may lack extensive IT resources. Key Features and Functionality: - Comprehensive Cyber Insurance: Coverage includes protection against ransomware, data restoration, business interruption, cybercrime, hardware replacement, and network security and privacy liabilities. - Advanced Cybersecurity Software: Features encompass real-time threat monitoring, automated data backups, secure remote access with multi-factor authentication, and endpoint detection and response. - User-Friendly Platform: The solution offers a streamlined interface for managing security alerts, software updates, and policy details, ensuring ease of use for businesses without dedicated IT teams. - Rapid Deployment: Businesses can receive quotes in minutes through an AI-powered underwriting process and implement the security software swiftly with single-click installation. - 24/7 Expert Support: Access to a dedicated Security Operations Center ensures continuous monitoring and prompt assistance during incidents. Primary Value and Problem Solved: Elpha Secure addresses the critical need for small and midsize businesses to protect themselves against the increasing prevalence of cyberattacks. By integrating cybersecurity measures directly into the insurance policy, it reduces the complexity and cost associated with managing separate security solutions and insurance coverage. This holistic approach not only enhances a business's security posture but also ensures financial protection, thereby reducing the likelihood of operational disruptions and financial losses due to cyber incidents. Ultimately, Elpha Secure empowers businesses to operate confidently in the digital landscape, knowing they are comprehensively protected against evolving cyber threats. #### Who Is the Company Behind Elpha Secure? - **Seller:** [Elpha Secure](https://www.g2.com/sellers/elpha-secure) - **Year Founded:** 2018 - **HQ Location:** New York, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=61ae500c177a51e99aa596cf2199372cec2975c298fe5c0c91ae2b2fcfa24988&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Felpha-secure&secure%5Burl_type%5D=linkedin_company_website) 53 employees on LinkedIn® ### [Email Hygiene and Validation](https://www.g2.com/products/email-hygiene-and-validation/reviews) Impressionwise offers a professional data hygiene and email validation service featuring a multi-layered approach to identify, validate and protect against a wide range of e-mail-based threats. #### Who Is the Company Behind Email Hygiene and Validation? - **Seller:** [Impressionwise](https://www.g2.com/sellers/impressionwise) - **Year Founded:** 2008 - **HQ Location:** Clearwater, US - **Twitter:** @Impressionwise\_ 143 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=6e691945e69ca299defa1e2fb8fe74525e280b284707951ca381b3d8ca68caf5&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2F22324576&secure%5Burl_type%5D=linkedin_company_website) 4 employees on LinkedIn® ### [EntrustedMail Email Threat Protection](https://www.g2.com/products/entrustedmail-email-threat-protection/reviews) EntrustedMail's Email Threat Protection is a comprehensive solution designed to safeguard organizations from a wide array of email-borne threats, including phishing, spam, malware, viruses, ransomware, and zero-day attacks. By leveraging advanced artificial intelligence and predictive technologies, it ensures a secure and efficient email environment, allowing businesses to operate without the constant concern of cyber threats. Key Features and Functionality: - Spam Detection: Achieves a 99.99% spam catch rate with a minimal 0.003% false positive rate, effectively filtering out unwanted emails. - Zero-Day Attack Protection: Utilizes advanced AI to detect and mitigate new, previously unknown threats in real-time. - Phishing Protection: Employs real-time scanning to prevent whaling and spear-phishing attacks, safeguarding against targeted email fraud. - Attachment Sandboxing: Analyzes suspicious email attachments in a secure environment to detect and block advanced threats. - Malware Link Blocking: Inspects all email-contained links against known malware and ransomware sources to prevent malicious content access. - Email Quarantine: Allows administrators to review, release, or delete quarantined messages, with optional daily reports for end-users. - Virus Detection: Identifies and blocks viruses before they infiltrate the email system, preventing potential outbreaks. - Attachment Filtering: Enforces email attachment policies by blocking or quarantining dangerous files that violate organizational guidelines. - Recipient Verification: Confirms the existence of recipient accounts before delivering emails, reducing the risk of data leaks through misdirected messages. Primary Value and User Solutions: EntrustedMail's Email Threat Protection transforms email systems into secure and efficient communication tools by proactively defending against a spectrum of email threats. This solution not only enhances security but also boosts productivity by minimizing disruptions caused by malicious emails. Organizations benefit from reduced risk of data breaches, compliance with regulatory standards, and the assurance that their email communications are protected against evolving cyber threats. #### Who Is the Company Behind EntrustedMail Email Threat Protection? - **Seller:** [EntrustedMail](https://www.g2.com/sellers/entrustedmail) - **Year Founded:** 2001 - **HQ Location:** Atlanta, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7f8512d16384a83624bef4d3033da378cbfcac7025a737c36ecbbe9403a6b3ed&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fentrustedmail%2Fabout%2F&secure%5Burl_type%5D=linkedin_company_website) 2 employees on LinkedIn® ### [FactorX: AI Powered Email Security for Modern Threats](https://www.g2.com/products/factorx-ai-powered-email-security-for-modern-threats/reviews) FactorX.ai is an AI-powered email security platform that protects enterprises from phishing, BEC, and malware using real-time threat detection, behavioral analysis, and automated incident response to stop advanced threats before damage is done. #### Who Is the Company Behind FactorX: AI Powered Email Security for Modern Threats? - **Seller:** [FactorX](https://www.g2.com/sellers/factorx) - **Year Founded:** 2024 - **HQ Location:** Newark, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=a0153005bde3cf6ccd8474fe407a9dd2816ded96eeafa3aad6a0516eac81a79a&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Ffactorxai&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [formpuppy](https://www.g2.com/products/formpuppy/reviews) formpuppy is an AI-powered spam filter for contact forms. It uses Claude Haiku to intelligently detect spam and sales emails, so only genuine inquiries reach your inbox. #### Who Is the Company Behind formpuppy? - **Seller:** [Pairtok](https://www.g2.com/sellers/pairtok) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [inumbo](https://www.g2.com/products/inumbo/reviews) inumbo is a cloud-based anti-spam service that works with any e-mail infrastructure. #### Who Is the Company Behind inumbo? - **Seller:** [inumbo](https://www.g2.com/sellers/inumbo) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [Janusmail](https://www.g2.com/products/janusmail/reviews) Every day Mailboxes and servers are subjects to phishing, spam, ransomware, viruses and malware attacks. JANUSMAIL is a new concept product, the result of 20 years of experience in the electronic mail management, created for: - Protect emails and servers from attacks and spam - Identify and resolve forwarding/receiving problems - Manage massive amunts of emails without slowdowns - Integrate seamlessly with Zimbra servers - In-depth analysis of incoming and outgoing emails - Include specific features for service providers #### Who Is the Company Behind Janusmail? - **Seller:** [B.L.S. Consulting Srl](https://www.g2.com/sellers/b-l-s-consulting-srl) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [Lexis Nexis Email Risk Assessment](https://www.g2.com/products/lexis-nexis-email-risk-assessment/reviews) LexisNexis Email Risk Assessment Confirms Emails with Confidence. #### Who Is the Company Behind Lexis Nexis Email Risk Assessment? - **Seller:** [LexisNexis](https://www.g2.com/sellers/lexisnexis) - **Year Founded:** 1970 - **HQ Location:** New York - **Twitter:** @NexisSolutions 1,258 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=2640972e8815f9e9e14be927e5c9a5d72a476b76190664d86c26e5c3db12a17d&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Flexisnexis%2F&secure%5Burl_type%5D=linkedin_company_website) 9,695 employees on LinkedIn® ### [Mailhardener](https://www.g2.com/products/mailhardener/reviews) Mailhardener helps you to secure your domain against being used for email fraud and spam. #### Who Is the Company Behind Mailhardener? - **Seller:** [Parsey B.V.](https://www.g2.com/sellers/parsey-b-v) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=ef29646226a95dadcaf9c750e40a1dbfd5d853e7906d38c0ad1a035f2002e742&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fparseyapp&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [Maldun Email Security Solution](https://www.g2.com/products/maldun-email-security-solution/reviews) Maldun Email Security Gateway (ESG) is a multi-featured mail gateway deployed in front of the mail server(s) to provide inbound email security, and after the mail servers before Internet for the outbound email security as well as other functions. Maldun ESG is powered by the next generation email security infrastructure and has the capability to filter out all sorts of email threats like spam, virus, phishing/scam, marketing/graymail. and other unwanted email messages. With the additional Maldun Advanced Threat Protection (ATP) integration, Maldun ESG is able to detect and block unknown and advanced threats. Tier One: Connection Control and authentication Block email threats at the connection phase to prevent threats and increase efficiency: • Denial of Service (DoS) Protection • SMTP Rate Limit • Sender IP Reputation Analysis • SMTP Transaction Check • Sender authentication (SPF, DKIM, DMARC) • Mail server authentication (TLS) Tier Two: Adaptive Sender Reputation Filtering More than an IP blacklist: 
 • Sender Reputation System based on multiple factors: Sender domain, Connecting IP, From address, To address, Sender/Recipient relations • Intelligent and adaptive, it learns user behaviors and adjusts automatically • Optimized algorithm guarantees flexibility, accuracy, and efficiency Tier Three: Anti-Virus Filtering A combination of ClamAV and/or other anti-virus engines and Maldun attachment pre-detector: 
 • Anti-Virus engine offers an extensive real time scanning and virus definition updates. Catch a variety of known virus and phishing patterns, spyware, Trojans, worms and malware threats. • Maldun attachment pre-detector analyze abnormal attachment traffic and attachment file type to predict and block potential attachment threats 
 Tier Four: Anti-Spam Protection Anti-spam methods eliminate more than 99% of spam with a range of deep anti-spam technologies including: • Maldun heuristic Spam content rules • Maldun Spam machine learning signatures • Global Spam fingerprints database • Sender Domain/IP blacklists • URL blacklists • Other Spam signatures 
 Tier Five: Graymail Detection Flexible Graymail (Marketing/Advertisement) analysis with independent On/Off/Mark switch: 
 • Newsletter • Campaigns • Social network • Advertisements 
 Tier Six: Advanced Threat Protection To protect against the unknown, new advanced malware, Maldun ESG submits email attachment files and URLs to the Advanced Threat Protection appliance. Maldun APT will scan and block as follow: • File/URL(domain, IP) reputation query Global File/URL black/whitelist database for quick comparison and detection. • Dynamic Sandbox Scanning Suspicious email attachments will be sent as encrypted packages to the powerful APT appliance to run dynamic sandbox scanning. • Optional Threat Analysis Cloud Analysis Maldun ESG supports API submission of Email attachments and URLs to the Maldun Threat Analysis Cloud. • Threat Scores and Malware family Threat Level Analysis that commands Maldun ESG to either block or release certain mails. • Professional Analysis Report Analysis report includes malicious file meta data, static analysis, behavior analysis, network activities and registry summary, etc Tier Seven: Anomaly Detection Maldun Anomaly Detection module detects anomalies and abnormal behaviors of Email Sender and Email Recipients. With pre-defined anomaly rules, the admin will always be warned about the email aromalies that require attention. Together with the Sender Reputation and customized VIP mailbox rules, Maldun Anomaly Detection effectively detects BEC and other email frauds. Tier Eight: Content Filters The Content Filters allows organizations to compile customized content signatures to detect text patterns or image patterns in the email body and/or attachments, and set up email processing strategies against the content violations. The Content Filters module can effectively work as sensitive content detection, content violation detection, and data leak protection for companies and organization to comply with regulations and policies. #### Who Is the Company Behind Maldun Email Security Solution? - **Seller:** [Maldun Security](https://www.g2.com/sellers/maldun-security) - **Year Founded:** 2016 - **HQ Location:** Hong Kong, HK - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=32a8e96041f0f0752f2fb88595e8a665a36ce1b0953ffda20427c04197118a7e&secure%5Burl%5D=http%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fmaldun&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [MIMEDefang](https://www.g2.com/products/mimedefang/reviews) MIMEDefang is an e-mail filtering tool that works with the Sendmail "Milter" library. MIMEDefang lets you express your filtering policies in Perl rather than C, making it quick and easy to filter or manipulate your mail. MIMEDefang is mature software: The first version was released in 2000. It's also in use in thousands of installations. It remains under active development. MIMEDefang is free software: It's released under the terms of the GNU General Public License. It runs under Linux, FreeBSD, Solaris and most other UNIX or UNIX-like systems. #### Who Is the Company Behind MIMEDefang? - **Seller:** [MIMEDefang](https://www.g2.com/sellers/mimedefang) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [N-able Spam Experts](https://www.g2.com/products/n-able-spam-experts/reviews) N-able SpamExperts helps web-hosting companies and ISPs/telcos strengthen email protection. Services include affordable inbound and outbound email filtering and archiving solutions—driven by a continuously updated Intelligent Protection & Filtering Engine to meet emerging threats. #### Who Is the Company Behind N-able Spam Experts? - **Seller:** [N-able](https://www.g2.com/sellers/n-able) - **HQ Location:** Morrisville, North Carolina - **Twitter:** @Nable 15,859 Twitter followers - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=5126feeafafe79ea909650b9a1843e1c77c65ad993ae2f9ac89cf6b559e88be4&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fn-able&secure%5Burl_type%5D=linkedin_company_website) 2,287 employees on LinkedIn® - **Ownership:** NYSE: NABL ### [OOPSpam](https://www.g2.com/products/oopspam/reviews) OOPSpam API stops bots and manual spam from reaching your customers with high accuracy and privacy. #### Who Is the Company Behind OOPSpam? - **Seller:** [Oopspam](https://www.g2.com/sellers/oopspam) - **Year Founded:** 2019 - **HQ Location:** Minneapolis, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=094bda92db714fc1ffa4e5267034f41a85fc11d565e11edb4ab0a14ebca83b1a&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Foopspam&secure%5Burl_type%5D=linkedin_company_website) 2 employees on LinkedIn® - [‹ Prev‹ Prev](/categories/email-anti-spam?order=g2_score&page=6#product-list) - [1](/categories/email-anti-spam?order=g2_score#product-list) - [2](/categories/email-anti-spam?order=g2_score&page=2#product-list) - [3](/categories/email-anti-spam?order=g2_score&page=3#product-list) - [4](/categories/email-anti-spam?order=g2_score&page=4#product-list) - [5](/categories/email-anti-spam?order=g2_score&page=5#product-list) - [6](/categories/email-anti-spam?order=g2_score&page=6#product-list) - 7 - [8](/categories/email-anti-spam?order=g2_score&page=8#product-list) - [Next ›Next ›](/categories/email-anti-spam?order=g2_score&page=8#product-list) Spotlight Categories [Managed File Transfer (MFT) Software](https://www.g2.com/categories/managed-file-transfer-mft) [Environmental Health and Safety Software](https://www.g2.com/categories/environmental-health-and-safety) [Fleet Management Software](https://www.g2.com/categories/fleet-management) [Digital Experience Platforms (DXP)](https://www.g2.com/categories/digital-experience-platforms-dxp) [Expense Management Software](https://www.g2.com/categories/expense-management) Similar Categories - [Secure Email Gateway](/categories/secure-email-gateway) - [Cloud Email Security](/categories/cloud-email-security) - [Email Encryption](/categories/email-encryption) - [Intelligent Email Protection](/categories/intelligent-email-protection) [Browse Email Anti-spam Themes](/categories/email-anti-spam/themes) ![Lauren Worth](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Lauren Worth") LW Researched and written by [Lauren Worth](https://research.g2.com/insights/author/lauren-worth) Updated October 3, 2024 Email anti-spam technology is used to prevent malicious content from being delivered via email. These tools scan email messages, content, and attachments for potential threats and then filter or block suspicious messages from being delivered. Administrators can whitelist approved content or senders while also blacklisting or blocking communications from suspicious parties. Companies use email anti-spam tools to prevent their employees from being misled through phishing attacks or compromising local networks when downloading malware. They also prevent employees from delivering information to misidentified users, saving the business from potential breaches. All [secure email gateway software](https://www.g2.com/categories/secure-email-gateway) possesses anti-spam or email filtering capabilities, but those tools also have additional features for comprehensive spam filtering, email encryption, and information archiving. To qualify for inclusion in the Email Anti-Spam category, a product must: - Filter email content for malware or viruses - Identify mislabeled senders or potential phishing attempts - Provide blacklisting or blocking capabilities to restrict communication with suspicious parties Show More