Best Email Security Products in 2025

We're on a mission to spread DMARC across the globe to make email and the internet safer for all.

Key dmarcian features:

Domain Overview Detail Viewer Source Viewer

paid Free Trial

Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues.

Key Netumo features:

Monitoring SSL Monitoring Twitter SMS notifications

Try for free freemium $9.0 / Monthly (Lite plan)

Learn about Proofpoint's email security solutions that protect organizations against threats such as email fraud, phishing, spam, bulk email, and viruses.

Key Proofpoint Email Security and Protection features:

Advanced Threat Protection Threat Intelligence URL and Attachment Defense Data Loss Prevention (DLP)

Cloud Native DMARC.

Key EasyDMARC features:

AI-powered DMARC Report Analyser DMARC, SPF, DKIM cloud management solutions Email source reputation monitoring

Open Source freemium $35.99 / Monthly (2 domains, 100K emails, 3 month data history, 1 user)

Symantec Email Security.cloud provides always-on, inbound and outbound email security against malware, targeted attacks, and advanced threats.

Key Symantec Email Security.cloud features:

Comprehensive Threat Protection Data Loss Prevention (DLP) Ease of Management Cloud-Based Service

Protect mail server against spam, viruses and malware with Proxmox Mail Gateway security for businesses, government, education and non-profit organizations.

Key Proxmox Mail Gateway features:

Open Source Cost-Effective High-Quality Spam Detection Comprehensive Security

Barracuda's Email Security Gateway is a powerful antivirus filter specifically designed to identify and eliminate email-borne threats, stopping hazards before they reach the network.

Key Barracuda Email Security Gateway features:

Comprehensive Threat Protection Cloud and On-Premise Options Advanced Filtering Technology Easy Scalability

Stop hackers to send emails from your domain.

Key PowerDMARC features:

Comprehensive Email Authentication User-Friendly Dashboard Threat Intelligence Customization and Flexibility

freemium $8.0 / Monthly

Use this program to "Unspam" your mailbox(es).

Key SpamAssassin features:

Open Source Highly Customizable Robust Community Support Effective Spam Detection

Open Source

Barracuda Essentials offers advanced Office 365 security features including email scanning, archiving, backup & recovery, and real-time phishing defense.

Key Barracuda Email Protection features:

Comprehensive Protection Cloud-Based Solution AI and Machine Learning Data Loss Prevention

Cisco Email Security protects against ransomware, business email compromise, spoofing, and phishing.

Key Cisco Email Security features:

Advanced Threat Protection Cloud and On-Premises Deployment Data Loss Prevention (DLP) Integration with Cisco Security Ecosystem

Rspamd is an advanced spam filtering system that allows evaluation of messages by a number of rules...

Key Rspamd features:

High Performance Modular Architecture Advanced Machine Learning Flexible Integration

A free tool to increase your email's deliverability.

Key Monitor and Implement DMARC features:

Increased Email Security Improved Email Deliverability Brand Protection Visibility and Reporting

Fortinet Email security is designed to block ransomware, phishing, and other cyber threats seeking entry via incoming email and outgoing messages don’t improperly leak sensitive data.

Key FortiMail features:

Comprehensive Security Integration with Fortinet Security Fabric Scalability Advanced Filtering Capabilities