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.
| Tool | License | Platforms | Pricing | Action |
|---|---|---|---|---|
| Abnormal AI | Proprietary | Web | Commercial | Profile→ |
| Apache SpamAssassin | Apache-2.0 | Linux, macOS | Open Source | Profile→ |
| Barracuda Email Protection | Proprietary | Web | Commercial | Profile→ |
| Darktrace /EMAIL | Proprietary | Web | Commercial | Profile→ |
| dmarcian | Proprietary | Web | Freemium | Profile→ |
| Fortra Email Security | Proprietary | Web | Commercial | Profile→ |
| Material Security | Proprietary | Web | Commercial | Profile→ |
| Mimecast | Proprietary | Web | Commercial | Profile→ |
| parsedmarc | Apache-2.0 | Linux, macOS, Windows | Open Source | Profile→ |
| PowerDMARC | Proprietary | Web | Freemium | Profile→ |
| Proofpoint | Proprietary | Web | Commercial | Profile→ |
| Rspamd | Apache-2.0 | Linux, macOS | Free / Commercial | Profile→ |
| Sublime Security | MIT | Web | Free / Commercial | Profile→ |
Software in Email Security Software
Abnormal AI
CommercialBehavioral AI email security that connects over API to Microsoft 365 and Google Workspace to stop BEC and account takeover.
Apache SpamAssassin
Open SourceClassic open source spam filter using heuristic scoring, Bayesian classification, and a plugin architecture.
Barracuda Email Protection
CommercialEmail protection suite with gateway and API deployment, domain fraud protection, and incident response.
Darktrace /EMAIL
CommercialSelf-learning behavioral email security with autonomous response for phishing and BEC.
dmarcian
FreemiumDMARC management platform founded by a co-author of the DMARC standard.
Fortra Email Security
CommercialDMARC enforcement and BEC defense suite incorporating Agari technology.
Material Security
CommercialAPI-based email security platform focused on account takeover, OAuth abuse, and message remediation.
Mimecast
CommercialEmail security and human risk platform with gateway filtering, DMARC analysis, and threat response services.
parsedmarc
Open SourcePython tool that parses DMARC aggregate and forensic reports and ships them to Elasticsearch, Splunk, or Postgres.
PowerDMARC
FreemiumCloud DMARC, SPF, and DKIM management platform with hosted authentication services.
Proofpoint
CommercialEnterprise email security platform covering gateway and API protection, DMARC enforcement, and account takeover defense.
Rspamd
Free / CommercialFast open source spam and phishing filtering system for Postfix, Exim, and Sendmail.
Sublime Security
Free / CommercialOpen email security platform with Message Query Language detections and a free community edition.
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
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 & Disciplines
Related Security Categories
Compliance automation frameworks, SCAP policy scanners, and risk management platforms.
Phishing campaign platforms, security awareness testing tools, and credential harvesting simulators.
SIEM platforms, EDR agents, SOAR automation, and detection rule engines for security operations.