Email Anti-spam Software List (May 2025)

Microsoft Defender for Office 365 is a cloud-based email filtering service that helps protect your organization against unknown malware and viruses by providing robust zero-day protection, and includes features to safeguard your organization from harmful links in real time.

Best anti-spam for enterprise email protection from Comodo. It has an array of spam filters, anti-virus scanners to prevent unsolicited mail. Get Free Now!

Symantec Mail Security for Microsoft Exchange (SMSMSE) combines anti-malware technology with advanced heuristics and file reputation. SMSMSE provides real-time protection for email against viruses, spyware, phishing, and other malicious attacks.

Find out how an email isolation solution allows users to safely access personal email without unintentionally introducing new threats into an organization.

Protect your organization from today’s advanced email threats, business email compromise (BEC), and consumer phishing with Proofpoint's Email Fraud Defense.

Learn how the sendmail Sentrion platform helps organizations that are using open source for large complex environments and need an enterprise platform that will enable a messaging roadmap.

This always-expanding portfolio of security & identity products can help your enterprise meet policy, regulatory, and business objectives.

Get Apex One™ Endpoint Protection and Security with the broadest range of capabilities, including high fidelity machine learning and advanced ransomware protection.

Comprehensive mail server security that blocks malicious emails while providing real-time protection and email reputation services.

Over 90% of targeted ransomware attacks start with a spear phishing attack. But with a single appliance, you can detect and block targeted attacks.

ScanMail suite for IBM Domino provides comprehensive mail server security with real-time protection and streamlined administration that blocks emails with links to malicious sites.

Check Point Anti-Spam & Email Security provides comprehensive protection for messaging infrastructure. A multidimensional approach protects email

Intermedia Hosted Exchange provides a comprehensive cloud-based Microsoft Exchange Online experience. Highlights include versatile security options and white glove email migration support. Exchange Email is one of 30+ essential business applications from Intermedia. With a single control panel, your cloud is easier to use and more efficient to manage.

MailChannels Outbound Filtering is a cloud-based SMTP relay service which identifies and blocks spammers to ensure reliable email delivery. With Outbound Filtering, user can eliminate email delivery problems caused by IP address blocklisting. Automatically shut down compromised accounts and scripts to improve your security.

SPAMfighter is a global provider of state-of-the-art computer, mobile and server utility and security products to millions of users from 235 countries.

MailHarderner is a domain security tool that protects domains against malware, phishing attacks, fraud, spam, and more. This improves the delivery rate of emails that are sent through the domains as they are more likely to be trustworthy and less likely to end up in the spam folder. The tool can be set up within 5 minutes and needs no software installation. It then churns out regular reports about emails that are sent through the domain name. Users can also set up the domain settings accordingly. It is packed with an email monitoring tool that provides information about all emails such as the ones sent from the user’s email server, third party tools, such as marketing platforms, billing systems, reporting tools, and even unauthorised senders. The TLS Reporting feature gives insights of any associated TLS failures that are encountered by email servers that are trying to deliver emails to the user’s domain.

All features that makes our cloud email protection solution for businesses as secure, accurate and utterly simple as it is. See for yourself!

MailCleaner Open-source Edition filtering technology is based on a group of sophisticated filtering technologies that work together. Users maintain total control over quarantine behavior: With a simple click, a user ...

The Outbound Spam Guard (OSG) is a carrier-grade solution that can be easily deployed to scan and block up to 99% of all unwanted or malicious outbound email traffic.

Clearedin provides cloud security, compliance and phishing prevention across all popular B2B chat, email, collaboration and file sharing software. This SaaS offering solves the growing and costly enterprise problem of both collaboration and email security. Clearedin delivers the platform's powerful multi- vector phishing capabilities through the patented Identity Trust Graph.