Email Security

Advanced protection against today’s sophisticated email-based threats, extensive policy controls, and in-depth data security and compliance management.


Make Email Safer

Protecting your email environment against spam, malware, phishing attacks, business email compromise, account takeover, ransomware and more is one of your top priorities.

Trustwave MailMarshal's multi-layered intelligence and detection engine performs a deep analysis of your inbound email traffic, in real-time, to protect your users from cyber threats.

MailMarshal enables you to integrate the workflow of your email content into business processes while scrutinizing outbound email traffic to prevent the loss of your proprietary data, intellectual property, confidential documents and financial records.

What is Trustwave MailMarshal?

Trustwave MailMarshal is a sophisticated multi-layered approach to email security, pioneering the latest proprietary and best-in-class technologies to reduce false positives and protect against spam, gateway attacks, viruses, phishing attempts, and malicious URLs embedded in email. It provides complete email protection against phishing and business email compromise (BEC).

Service Highlights

What you get with Trustwave MailMarshal

Data Loss Protection

Powerful data loss protection to help safeguard your intellectual property and achieve regulatory compliance

SIEM Integration

Ability to integrate into any Security Information and Event Management (SIEM) with APIs available for threat remediation

Domain Protection

Domain protection from unauthorized use with Domain-based Message Authentication, Reporting and Conformance (DMARC)

Forgery Detection

Detection of forged sender addresses in emails with Domain Keys Identified Mail (DKIM)

AIP/RMS Integration

Microsoft Azure Information Protection and Rights Management Services (AIP/RMS) integration

Complete Control

Comprehensive management controls and a flexible policy engine to enable workflow integration with your custom business processes

Built-in Intelligence

Built-in industry, machine and human intelligence from elite Trustwave SpiderLabs email security researchers

24/7 Support

Around-the-clock support via online, email and phone, plus maintenance updates

MSS Integration

Easy integration with Trustwave Managed Security Services for more in depth endpoint, database and network threat protection

Performance Accuracy

High detection rates and less false positives​

Platform Compatibility

Works seamlessly with cloud-hosted service providers​

Budget Friendly

Budget-friendly email security backed by industry-leading threat intelligence​

Simplified Implementation

Enables customers to achieve cost effective and comprehensive email security

Trustwave SpiderLabs

Industry-leading security researchers reverse-engineer and de-obfuscate unknown exploits and malware variants

Research Report

2021 Email Threat Report

The 2021 Trustwave Email Threat Report details some of the most significant email threats organizations face and provides a window into the latest developments in the world of cybercrime.

Get Your Copy Now

Layered Protection

Layering Trustwave MailMarshal with Microsoft 365 or other web-based email gateways

Layering Trustwave MailMarshal with Microsoft 365 or other web-based email gateways delivers advanced protection from ordinary to sophisticated attacks by proactively detecting suspicious email, removing them from end user access and shielding well-intentioned end users from falling prey to known and targeted attacks.

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Deployment Options

Flexible Deployment Options that fit the Needs of Your Business

On Premise

Gain industry leading protection against spam, phishing, malware, blended and targeted attacks by retaining on-site control and granularity of the data in your environment with an on-premises solution.


Maintain flexibility and control while migrating to cloud email solutions. Combine a software-based on-premises or SaaS-delivered cloud deployment to furnish additional layers of protection and provide maximum detection against advanced threats.


Gain industry leading protection using a constant flow of product updates and enhancements. Achieve improved email security, and save money by complementing your web-based email gateways with Cloud.

Free Trial

Try Trustwave MailMarshal with SQL Express free for 30 days.

Standard Features

Comprehensive Protection

  • Advanced Detection and Filtering

    Stops external phishing, business email compromise and other threats by scanning for email anomalies, inconsistencies, and malicious behavior in the email’s structure, content, attachment, and links.

  • Extensive Policy Controls

    Implement custom policy configurations based on trigger points, content filtering and other policies for greater control.

  • Customizable Business Email Compromise (BEC) Protection

    Avoid targeted phishing and BEC attacks through the combination of email security measures, employee education and best practices.

  • Data Loss Prevention (DLP)

    Scan outbound emails and attachments to provide full DLP-level inspection to manage confidential data and meet stringent industry and regulatory requirements.

  • Time of Click URL Scanning

    Validates every URL and webpage at the time of click and not just at the time of receipt to ensure you are protected anytime and from any device.

Optional Features

Additional Security Modules

  • Advanced Threat Protection

    Identifies, catches, neutralizes and blocks, in real-time, websites that serves up suspicious or malicious code to company users and provides zero-day protection against phishing, blended and targeted threats.

  • Comprehensive Email Archiving

    Provides a systematic approach to save and protect the data contained in email messages to enable fast retrieval. This tool plays an essential role at companies in which data permanence is a priority.

  • Image Analyzer

    Automatically scans and sorts images entering the company via email into two categories – offensive and normal and acceptable. Protects employees, customers and suppliers from exposure to inappropriate and illegal content reducing and removing legal liability.

  • Malware Analysis Sandbox

    Proactively prevents advanced malware and provides a safe environment in which to execute and observe malicious code or to encourage threats into exposing themselves. It also reduces the amount of time between infection and remediation, mitigates the risk of breaches, and detects zero day or unknown attacks.

  • Simple, Advanced Email Encryption

    Email users can securely send emails containing sensitive or confidential information and documents to any recipient around the globe without requiring the recipient to download or install any software.

System Requirements

For on-premise edition of Trustwave MailMarshal