Email Security Software
Email security platforms filter malicious mail, detect business email compromise, and protect mailboxes against account takeover through gateway and API-based inspection.
Software in Email Security Software
13 toolsNo tools in this category match the selected filters.
| Tool | License | Platforms | Pricing |
|---|---|---|---|
| Abnormal AI Behavioral AI email security that connects over API to Microsoft 365 and Google Workspace to stop BEC and account takeover. | Proprietary | Web | Commercial |
| Apache SpamAssassin Open source spam filter using heuristic scoring, Bayesian classification, and a plugin architecture. | Apache-2.0 | Linux, macOS | Open Source |
| Barracuda Email Protection Email protection suite with gateway and API deployment, domain fraud protection, and incident response. | Proprietary | Web | Commercial |
| Darktrace /EMAIL Self-learning behavioral email security with autonomous response for phishing and BEC. | Proprietary | Web | Commercial |
| dmarcian DMARC management platform founded by a co-author of the DMARC standard. | Proprietary | Web | Freemium |
| Fortra Email Security DMARC enforcement and BEC defense suite incorporating Agari technology. | Proprietary | Web | Commercial |
| Material Security API-based email security platform focused on account takeover, OAuth abuse, and message remediation. | Proprietary | Web | Commercial |
| Mimecast Email security and human risk platform with gateway filtering, DMARC analysis, and threat response services. | Proprietary | Web | Commercial |
| parsedmarc Python tool that parses DMARC aggregate and forensic reports and ships them to Elasticsearch, Splunk, or Postgres. | Apache-2.0 | Linux, macOS, Windows | Open Source |
| PowerDMARC Cloud DMARC, SPF, and DKIM management platform with hosted authentication services. | Proprietary | Web | Freemium |
| Proofpoint Enterprise email security platform covering gateway and API protection, DMARC enforcement, and account takeover defense. | Proprietary | Web | Commercial |
| Rspamd Open source spam and phishing filtering system for Postfix, Exim, and Sendmail. | Apache-2.0 | Linux, macOS | Free / Commercial |
| Sublime Security Open email security platform with Message Query Language detections and a free self-hosted Docker deployment. | MIT (deployment scripts and detection rules); proprietary (platform) | Web | Free / Commercial |
About Email Security Software
Email security software inspects mail traffic and mailbox state to stop phishing, business email compromise, malware delivery, and account takeover. The category covers two deployment models. Gateway-based products sit in the mail path and filter messages before delivery. API-based products connect to Microsoft 365 or Google Workspace after authentication and analyze messages, rules, and OAuth grants from inside the mailbox, which lets them retroactively remove threats and detect compromise that a gateway never sees. The category also includes authentication tooling: DMARC management platforms collect and parse aggregate reports, help domains publish correct SPF and DKIM records, and enforce policy against spoofing. Open source options cover the filtering engine layer, such as spam classifiers and mail scanner daemons, and self-hosted DMARC report parsing. Teams combine these tools with phishing simulation programs in the social engineering category to test both the mail defenses and the people behind them.
Covered Topics
In This Catalog
- This category lists 13 tools: 7 commercial, 2 free / commercial, 2 freemium, and 2 open source.
- By platform, 3 run on Linux, 1 on Windows, 3 on macOS, and 10 on the web.
Frequently Asked Questions
What is Email Security Software?→
Email security platforms filter malicious mail, detect business email compromise, and protect mailboxes against account takeover through gateway and API-based inspection.
What topics does the Email Security Software category cover?→
Secure Email Gateways, API-Based Inbox Security, Business Email Compromise Detection, DMARC / SPF / DKIM Management, Phishing Response
Which Email Security tools are open source?→
2 of the 13 tools in this category are open source: Apache SpamAssassin and parsedmarc.