The Best Email Monitoring Software

If your organization depends on email for daily operations, you already know how vulnerable that channel can be. A single phishing message or accidental data leak can expose customer information, disrupt operations, and damage your reputation overnight. That is why most organizations deploy email monitoring software to protect their systems.

Email monitoring software is a security tool that tracks, analyzes, and controls email communication within an organization to protect data and prevent misuse. They use advanced data loss prevention (DLP), encryption, and behavior analytics to stop internal and external risks.

Imagine an employee accidentally sending a spreadsheet with client details to the wrong person, or a fake invoice slipping past your filters. A strong email monitoring solution can catch those mistakes before they cause harm. It can automatically flag, quarantine, or encrypt risky messages. You get instant alerts, clear audit trails for compliance, and the confidence that your organization’s communications are protected.

Email monitoring software can help your organization avoid the following pain points:

• Reduce the risk of data breaches by detecting and preventing sensitive information from leaving your organization via email.
• Prevent phishing, malware, and ransomware attacks from reaching your users’ inboxes.
• Ensure regulatory compliance by monitoring and controlling emails that contain confidential or regulated data.
• Gain visibility and control over internal and external email communications across multiple platforms.
• Minimize financial and reputational loss caused by email-borne threats or accidental data leaks.
• Enforce consistent security policies without relying on manual oversight.

In this article, we explore the best email monitoring software available today. The recommendations are based on an in-depth analysis of threat detection accuracy, compliance readiness, scalability, and vendor reliability so that you can choose the right solution with confidence.

Our list of the best email monitoring software

Based on our independent research, selection requirements, and rating methodologies, these are the best email monitoring software tools on the market today:

1. Guardz EDITOR’S CHOICE A unified security platform for MSPs and SMBs. It integrates email monitoring with identity, device, cloud, and external-risk protection. Get a 14-day free trial.
2. Fortra Agari (GET DEMO) Provides advanced phishing, BEC, and email-authentication protection, supported by strong data-science models and expertise in DMARC enforcement. Request a demo.
3. ManageEngine Endpoint DLP Plus (FREE TRIAL) Monitors email activity from endpoints to prevent sensitive data from leaving your organization via unauthorized emails or attachments. Get a 30-day free trial.
4. TitanHQ Offers cloud-based email security, phishing detection, DNS filtering, and archiving for MSPs and mid-sized organizations.
5. Darktrace / EMAIL Uses artificial intelligence to detect unusual email behavior, stop phishing, and prevent data leaks by learning normal communication patterns in your network.
6. Proofpoint Email Protection Focuses on blocking phishing, business email compromise, and data exfiltration.
7. Mimecast Email Security & DLP A cloud-based gateway that filters threats, prevents sensitive data leaks, and ensures compliance through policy-driven email control.
8. Forcepoint DLP for Email Specializes in detecting and blocking unauthorized sharing of confidential information using deep content inspection and predefined data policies.

The number of email monitoring systems available has exploded in recent years, so it can take a lot of time to research the industry to find the right solution for your business. We have cut down the time that the task will take you by identifying the best email security monitoring tools available today.

If you need to know more, explore our vendor highlight section just below, or skip to our detailed vendor reviews.

Best email monitoring software highlights

Key points to consider before purchasing an email monitoring software

Here are the key factors to consider before making a buying decision:

• Security capability: You assess how well the tool detects phishing, malware, data leaks, and insider threats. A strong tool accurately identifies risks across all inbound and outbound emails.
• Compliance and audit: You verify that it supports encryption, retention, and laws such as GDPR or HIPAA. It should keep detailed logs and reports for investigations and audits.
• Operational integrity: You verify that it runs smoothly without slowing down email delivery. It must integrate easily with your current mail systems and scale as your organization grows.
• Usability and cost: You evaluate how quickly it can be deployed, how few false alerts it generates, and whether its licensing and maintenance costs align with your budget.
• Vendor reputation: You confirm that the vendor ranks well in trusted reviews and independent security tests (e.g., Gartner, Forrester, SE Labs), showing consistent performance and reliability.

To dive deeper into how we incorporate these into our research and review methodology, skip to our detailed methodology section. 

The Best Email Monitoring Software

Most of these solutions are cloud-based, while some use gateway, API, appliance, or on-premises deployment models.

1. Guardz (FREE TRIAL)

Best For: MSPs, SMBs, and organizations with limited internal security resources.

Price: Quote-based; eligible MSPs can claim a free Community/NFR plan

Guardz is a unified cybersecurity platform designed mainly for MSPs that want a single system to manage protection across identities, endpoints, cloud apps, email, and overall security posture. It comes with AI-driven detection with 24/7 human-led MDR, correlating signals across users and devices to identify real threats. The platform also includes security awareness training, risk scoring, automated remediations, and email monitoring.

The email monitoring focuses on detecting phishing, spoofing, malware, and other suspicious activity by scanning Microsoft 365 and Google Workspace at the API level. It classifies emails by risk, quarantines high-risk items by default, applies caution banners, and performs sender-authentication checks (SPF/DKIM/DMARC). The system improves over time through user-reported phishing incidents and AI-based analysis, and can be further enhanced with an embedded Check Point Harmony Email engine.

Licensing is per-user and offered in tiered plans: Community, Pro, and Ultimate. Email protection is included across all tiers, and advanced endpoint capabilities are reserved for higher plans. MSPs can use the no-cost Community plan internally or start with a 14-day trial.

Key Features:

• AI‑powered email scanning: Guardz analyzes incoming emails in real time to classify them as legitimate, phishing, malware, spoofing/impersonation, or spam.
• Broad threat coverage: It defends against phishing, malware/ransomware, spoofing/impersonation, and spam.
• API‑based integration (no gateway required): Guardz connects directly to Microsoft 365 or Google Workspace. It scans mailboxes without requiring MX record changes or on‑premises gateway hardware.
• Customizable risk‑based actions: Administrators can define what happens when an email is flagged, depending on its risk level.
• Impersonation detection and email‑authentication checks: Guardz checks SPF, DKIM, DMARC, and also detects alias/sender‑history mismatches to flag impersonation attempts.
• User reporting & adaptive learning: Recipients can report suspicious emails; those reports feed back into the system to help refine detection over time.
• Quarantine and user/admin‑led remediation: Suspect emails can be quarantined; users or admins can review and restore or delete them via a portal.
• Integration with broader security stack: Because Guardz is a unified cybersecurity platform, its email monitoring works alongside identity, endpoint, cloud, and data‑security controls.

Unique Buying Proposition

The most compelling differentiator of Guardz as an email-monitoring solution is that its email monitoring is only one part of a broader, unified security system built specifically for MSPs and SMBs. Instead of treating a suspicious email as an isolated event, Guardz links it to what the same user is doing across identities, devices, cloud apps, and external exposure. This creates a clearer view of whether an email threat is part of a larger attack. It offers enterprise-level correlation, but in a way MSPs can actually manage.

Because Guardz’s MDR team has visibility across email, identity, endpoints, the cloud, and the digital footprint, they can investigate and respond with context, not guesswork. A phishing email linked to a flagged login is treated as a high-priority incident. A lone suspicious email without other supporting signals can be safely deprioritized. This reduces noise and accelerates real incident handling,

The consolidation matters even more because Guardz embeds insurance underwriting criteria directly into its risk scoring. In the SMB world, where budgets are tight and teams are small, that convergence of email security, multi-layer detection, MDR-backed response, and insurance-aware posture management is what gives Guardz its defensible differentiation.

Feature-In-Focus: Guardz’s AI-driven email threat detection and automated response

Guardz is built to continuously scan incoming emails for phishing, impersonation, ransomware, and other malicious content by using AI, metadata analysis, and authentication checks. It then automatically quarantines or flags high-risk messages and alerts administrators. In return, you gain proactive, always-on protection against email-based threats.

Why do we recommend Guardz?

We recommend Guardz as an email-monitoring tool because it extends basic email scanning with managed detection and response across multiple security layers. Its approach helps reduce alert fatigue. It ensures that higher-risk incidents are addressed promptly. It also aligns risk scoring with broader organizational considerations.

Who is Guardz recommended for?

Guardz primarily targets MSPs, SMBs, and organizations with limited internal security resources. It also appeals to businesses that seek to align their security posture with cyber insurance requirements.

You can get a look at Guardz by accessing a 14-day free trial.

2. Fortra Agari Email Security (GET DEMO)

Best For: Large enterprises and MSPs that face serious email security challenges

Price: Not publicly listed

Fortra Agari Email Security is a suite of cloud-native solutions that aims to protect organizations against advanced email threats, including phishing, business email compromise (BEC), spear phishing, and email impersonation. It uses email authentication, AI-powered data science models, and Suspicious Email Analysis to prevent both inbound and outbound threats.

Its solutions include Cloud Email Protection to stop threats that bypass legacy filters, Agari DMARC Protection to prevent the spoofing of outbound emails and protect brand identity, Suspicious Email Analysis for rapid detection and response, and a Threat Intelligence Service to uncover emerging cybercrime trends.

In fact, Fortra co-founded the DMARC standard, a widely adopted protocol that prevents attackers from spoofing an organization’s domain to send fraudulent emails. The platform aims to protect both inbound emails from threats such as phishing and BEC, and outbound emails from being spoofed.

Key Features:

• Cloud Email Protection: Stops phishing, spear phishing, BEC, and other advanced threats from bypassing legacy filters.
• Agari DMARC Protection: Prevents spoofing of outbound email to protect brand reputation and customer trust.
• Suspicious Email Analysis: Rapidly detects, investigates, and remediates suspicious messages.
• Threat Intelligence Service: Leverages dedicated research teams to identify emerging cybercrime trends.
• AI-powered Detection: Enhance the accuracy of threat classification and prioritization.
• Integration with Enterprise Workflows: Works with hybrid deployments and integrates with SIEM and SOAR platforms for automated incident response.

Unique Buying Proposition

The unique buying proposition of Fortra Agari Email Security is its focus on email identity protection and AI-driven threat detection. Agari emphasizes preventing impersonation and business email compromise (BEC) by linking inbound threat analysis with outbound email authentication through DMARC. Its AI-powered data science models, cloud-native architecture, and Suspicious Email Analysis allow organizations to detect, prioritize, and respond to sophisticated attacks in context.

Furthermore, the co-founding of the DMARC standard gives Fortra credibility and technical authority in email authentication, which underpins the reliability and differentiation of its email security suite.

Feature-In-Focus: Fortra Agari’s Continuous Detection & Response capability

Fortra Agari can automatically detect and remove malicious emails even after they’ve been delivered to inboxes. The company prominently markets its Continuous Detection & Response (CDR) as the defining feature.

Their datasheets and product pages explicitly describe CDR as “the only technology on the market” that can “remove latent threats from inboxes that have already bypassed existing email security systems.”

Why do we recommend Fortra Agari Email Security?

We recommend Agari as an email-monitoring platform because it addresses the operational challenges that modern organizations face in managing email security at scale. It provides tools for continuous visibility, reporting, and remediation.

However, you need dedicated security staff or SOC resources to monitor dashboards, review alerts, and take action on flagged emails. Smaller organizations without experienced personnel might find the volume of data and incident workflows daunting.

Who is Fortra Agari Email Security recommended for?

Agari is recommended for large enterprises and MSPs that face complex email security challenges and require advanced protection against phishing, BEC, and domain impersonation.

Organizations that rely heavily on email for business operations will also benefit from Agari’s identity-focused approach, DMARC-based authentication, and AI-driven threat detection.

There is no free trial for the DMARC service, but you can access a demo.

Fortra Agari Email Security Request a Live FREE Demo

3. ManageEngine Endpoint DLP Plus (FREE TRIAL)

Best For: Organizations that handle sensitive or regulated information.

Price: Starts at $795 per year for 100 computers and one technician; annual subscription, perpetual licensing, Free Edition, and custom quotes are available.

ManageEngine Endpoint DLP Plus (Email Security and Outlook) is a DLP solution designed to protect sensitive information shared through email. It is part of ManageEngine’s broader Endpoint DLP Plus suite, which secures data across endpoints by controlling how information is stored, transferred, and communicated.

In the context of email security, the software actively monitors the emails you and your employees send, especially through Microsoft Outlook, to make sure no sensitive or confidential information leaves your organization without authorization. It automatically scans the content and attachments of outgoing emails, looking for specific data patterns. If it detects something that violates your company’s data policies, it can block the email, quarantine it, or alert your security team.

ManageEngine currently does not offer a cloud or hybrid deployment option for Endpoint DLP Plus; all monitoring, analysis, and policy management are handled through your local infrastructure.

Key Features:

• Email Content Scanning: The system scans email bodies, attachments, and headers for sensitive or restricted information before messages are sent.
• Policy-Based Control: You can create and enforce policies to block, allow, or flag emails based on detected data types and your organization’s compliance requirements.
• Outlook Integration: The tool integrates directly with Microsoft Outlook for real-time monitoring and enforcement as users send emails.
• Trusted Domain Whitelisting: You can whitelist internal or approved domains to ensure sensitive data only circulates within authorized networks.
• Granular Permission Levels: Choose between audit-only, allow within trusted domains, or full blocking modes.
• On-Premises Deployment: All monitoring, analysis, and policy management occur on your local infrastructure, which gives you complete control over your data and compliance.

Unique Buying Proposition

In the context of email monitoring, the unique value proposition of ManageEngine Endpoint DLP Plus is its ability to link email data protection with overall endpoint control. The software gives you unified oversight of how sensitive information moves, whether via email, file sharing, or external devices. This integrated approach helps ensure that data leaving your organization through email is managed consistently with your other communication channels.

Feature-In-Focus: Email Data Loss Prevention (Email DLP)

The product automatically scans all parts of outgoing emails (sender, subject, CC/BCC, attachments) for sensitive content and blocks or restricts the sending of emails carrying regulated or confidential data. Email DLP is central to email monitoring because it performs content-level inspection of every outbound message.

Why do we recommend ManageEngine Endpoint DLP Plus (Email Security and Outlook)?

Consider using ManageEngine Endpoint DLP Plus to protect your email messages in transit and prevent them from being sent to unintended recipients. It helps you stop accidental leaks, meet compliance standards, and maintain complete visibility over outbound communication.

You can start in audit mode to observe how data is shared through emails, then gradually move to blocking or restricting messages once key risks are identified. This step-by-step approach helps you stay in control and adjust your data protection measures as your organization evolves.

However, it is essential to know that Endpoint DLP Plus is primarily a DLP solution. Its core function is to detect, prevent, and control unauthorized transfers of sensitive data. If you need broad email monitoring capabilities beyond data loss prevention, you should pair it with a more comprehensive email management or security solution.

Who is ManageEngine Endpoint DLP Plus (Email Security and Outlook) recommended for?

This solution is suitable for organizations that handle sensitive or regulated information. If you manage a large workforce that communicates heavily via Outlook or other corporate email systems, this tool gives you the oversight you need to prevent unintentional or malicious data leaks.

ManageEngine Endpoint DLP Plus is available for Windows Server and you can assess the system with a 30-day free trial.

ManageEngine Endpoint DLP Plus Start a 30-day FREE trial

4. TitanHQ Email Security

Best For: MSPs and mid-sized to large organizations that rely heavily on Microsoft 365

Price: Starts at $3.74 per user, per month

TitanHQ Email Security is a cybersecurity company that provides a suite of cloud-based solutions to protect businesses and MSPs from a wide range of email, web, and network threats. The company was founded in 1999, originally as CopperFasten Technologies, at a time when email-borne threats, spam, and early forms of malware were becoming significant operational problems for businesses.

The company emerged to address these practical security gaps with tools focused on filtering, threat detection, and web protection. Its evolution since then reflects a steady expansion of capabilities rather than a marketing-driven reinvention. Its current email protection solution includes:

• PhishTitan: An AI-driven email security solution for Microsoft 365 that detects and removes advanced phishing and BEC attacks-even after delivery.
• SpamTitan: Blocks spam, malware, ransomware, and harmful links.
• WebTitan: Provides DNS-based web filtering and protection against web-borne threats.
• ArcTitan: An email archiving solution for Microsoft 365 that supports fast search, automated setup, and data loss protection.

The platform is built for scalability, simplified deployment, and layered security. TitanHQ uses a straightforward per-user subscription licensing model applied across its products. MSPs can manage licenses centrally through a multi-tenant dashboard. However, this structure means costs scale directly with the number of users and may become expensive for large organizations or inefficient for very small ones.

Key Features:

• Multi‑layer Email Protection: Integrates gateway‑level filtering and mailbox‑level protection for threats before, during, and after delivery.
• AI / ML & Threat‑Intelligence Detection: Uses machine learning, link/URL rewriting, time‑of‑click analysis, and curated threat‑intelligence feeds to detect sophisticated phishing, zero‑day attacks, and BEC.
• Malware, Spam, and Malware Filtering: Scans for spam, phishing, malware, ransomware, and malicious URLs or attachments.
• Post‑Delivery Remediation (PDR): Allows removal or quarantine of malicious emails even after they reach users’ inboxes.
• Microsoft 365 Integration: Works natively with Microsoft 365 (and Outlook) via APIs-no need to reroute MX records or deploy gateway hardware

Unique Buying Proposition

TitanHQ’s unique selling point is its purpose-built, MSP-centric security ecosystem, which includes email security, DNS filtering, phishing protection, and archiving, all integrated into a multi-tenant platform. It offers a consolidated stack designed for service providers who need to efficiently manage dozens or hundreds of customer environments.

Its proprietary threat-intelligence models offer strong detection for zero-day phishing and BEC attacks. Similarly, WebTitan and SpamTitan extend protection beyond the inbox to web traffic and spam filtering. The layered security, multi-tenant management, and AI-driven detection capabilities give it a unique position among email monitoring and protection vendors.

Feature-In-Focus: SpamTitan by TitanHQ

TitanHQ’s multi-layered, AI-driven email scanning and filtering protects users by blocking 99.99% of spam, phishing, malware, and malicious attachments before they reach the inbox. It acts as a digital expatriate for your inbox, keeping malicious emails out while letting legitimate messages through.

Why do we recommend TitanHQ Email Security?

We recommend TitanHQ because it consistently delivers operational reliability, breadth of coverage, and strong detection performance across real-world environments. Its tools are widely deployed by MSPs and mid-sized organizations that need dependable filtering, rapid remediation, and consistent visibility into phishing and spam trends.

It is a practical choice for teams that want accurate protection, thanks to its strong Microsoft 365 integration and reliable performance in blocking both common and emerging phishing threats.

This assessment is based on our pulling together of widely documented industry context, the vendor’s publicly available technical materials, and independent analyst reviews.

Who is TitanHQ Email Security recommended for?

We recommend TitanHQ for MSPs and mid-sized to large organizations that rely heavily on Microsoft 365 and need scalable, multi-layered email security. It is also suitable for teams that require reliable protection against phishing, BEC, spam, malware, and web-based threats.

5. Darktrace / EMAIL

Best For: Mid to large-scale organizations that handle sensitive data and operate in cloud environments.

Price: Not publicly listed

Darktrace / EMAIL is an AI-driven email security and monitoring solution that detects and stops phishing, account compromise, and data loss in real time. Darktrace/Email gives you complete visibility into every direction your messages travel. It monitors inbound, outbound, and even internal (lateral) communications to catch threats wherever they appear.

You can block malicious emails before they reach inboxes, stop sensitive data from leaving your organization, and detect unusual internal activity that might indicate a compromised account. It also monitors user behavior and alerts you to suspicious logins or sudden rule changes. It comes with an autonomous DLP module, which adds another layer of defense.

Key Features:

• Self-Learning AI: The system studies your organization’s unique communication patterns to detect abnormal behavior without relying on static threat feeds.
• 360° Mailflow Monitoring: You gain visibility into inbound, outbound, and lateral (internal) messages to detect threats and data leaks at every stage.
• Autonomous Threat Response: Darktrace can automatically quarantine, rewrite, or block suspicious emails without manual intervention.
• Data Loss Prevention (DLP): The platform monitors for sensitive content or unusual activity to prevent accidental or malicious data leaks.
• Microsoft Integration: It integrates seamlessly with Microsoft 365, Exchange, and Teams for unified protection across email and chat.
• Behavioral Account Protection: Detects abnormal logins or rule changes that may indicate account compromise.
• Adaptive Learning: The AI continually updates its understanding as user behavior and communication patterns evolve, reducing long-term maintenance.

Unique Buying Proposition

Darktrace/Email’s unique buying proposition is its Self-Learning AI, which understands your organization’s unique communication patterns. Because the AI adapts automatically, you don’t waste time on constant rule updates or manual tuning. It can act instantly, quarantining or rewriting malicious emails without human input.

Feature‑In‑Focus: Self‑Learning AI behavioral anomaly detection

This feature helps you spot novel, unseen threats by learning each user’s unique communication patterns and flagging subtle deviations in content, tone, links, or sender behavior.

Darktrace AI learns each user’s normal communication patterns in real time and flags even subtle deviations, such as unusual phrasing, unexpected attachments, or atypical links, that may indicate malicious activity.

Why do we recommend Darktrace / EMAIL?

We recommend Darktrace/Email because it delivers measurable security impact and operational efficiency. There are independent reviews and case studies that suggest that Darktrace/Email can reduce phishing incidents, investigation time, and manual workload through its AI-driven detection and response.

We analysed user feedback on platforms such as Gartner Peer Insights and Reddit and found that most reported improved accuracy and fewer false positives compared to traditional rule-based tools. Some organizations also cite faster response times and reduced analyst fatigue after deployment.

However, outcomes vary by environment, email volume, and the effort put into tuning. The system’s learning phase may initially generate extra alerts until it adapts to your organization’s communication patterns. Cost and technical complexity can be higher than standard gateways, and measurable benefits depend on integration quality and user engagement. These factors should be evaluated alongside its potential efficiency gains when considering Darktrace/Email for enterprise use.

Who is Darktrace / EMAIL recommended for?

Darktrace/Email is best suited for mid to large-scale organizations that handle sensitive data, operate in cloud environments, and face frequent phishing and insider threat risks. It offers adaptive, AI-driven monitoring that enhances detection accuracy.

However, smaller organizations with limited technical resources may find their cost, configuration needs, and learning period challenging. Therefore, you need to evaluate the total cost of ownership, integration requirements, and staff capacity before you deploy.

6. Proofpoint Email Protection

Best For: Medium-to-large organisations that face severe email threat exposure

Price: Not publicly listed

Proofpoint Email Protection is a cloud-based email security solution that protects your organization’s inbound and outbound email from a wide range of threats. It blocks spam, malware, phishing, business email compromise (BEC), and impostor emails, and offers data loss prevention, encryption, and detailed reporting to help you secure people, data, and brand reputation.

The platform’s Nexus AI is its engine room. It blends language models that detect manipulation or urgency cues, machine learning that identifies behavioral similarities to known threats, and a relationship graph that maps everyday user interactions to flag anomalies.

From an operational standpoint, you gain total visibility into threat trends, actor behavior, and user risk. Proofpoint’s reputation is backed by independent validation. It was named a Leader in Gartner’s 2024 Magic Quadrant, Forrester Wave, and Frost Radar for Email Security.

Key Features:

• URL Defense: The tool rewrites and inspects all links in emails in real time to block malicious or compromised URLs before users click.
• Attachment Defense: It scans email attachments-including embedded URLs and lesser-known file types for malware and other threats using sandboxing and reputation analysis.
• Advanced Impostor & BEC Protection: It uses behavioral analysis, sender-recipient graphs, and language models to detect sophisticated attacks like business email compromise (BEC) and impersonation, even when no malicious payload is present.
• DLP & Encryption: The platform monitors outgoing email content for sensitive data (PII/PHI/financial info) and automatically encrypts or blocks it in accordance with policy.
• Post-Delivery Message Pull / Automated Remediation: If a malicious email is discovered after delivery, the system can recall or quarantine it from users’ inboxes and follow its forward and distribution paths.
• Detailed Reporting & Visibility: Covers threat actor trends, email flow analytics, and internal account behavior, and includes a broad set of built-in dashboards and granular policy controls.

Unique Buying Proposition

Proofpoint Email Protection distinguishes itself through the scale of its threat intelligence network, which is informed by data from trillions of analyzed emails. Its design emphasizes the detection of human-targeted attacks, such as phishing and business email compromise, rather than payload-based threats.

The Nexus AI platform fuses language modeling, behavioral analytics, and relationship mapping to analyze communication patterns with greater contextual understanding than traditional rule-based or signature-based systems.

Feature‑In‑Focus: Multi‑layered threat detection

Proofpoint’s multi-layered detection with post-delivery remediation ensures that even if a threat bypasses the initial filter, it can be automatically identified and removed later. This feature is crucial because email threats are constantly evolving, and traditional static filters can miss sophisticated attacks such as BEC, targeted phishing, and delayed-activation malware.

Why do we recommend Proofpoint Email Protection?

We recommend Proofpoint Email Protection because it delivers consistent, measurable performance in enterprise environments where email remains the primary attack vector. The platform also reduces operational strain by automating investigation and remediation.

Its detection rates, automation, and integration depth have been validated by independent assessments, including the Gartner Magic Quadrant and the Forrester Wave. These achievements reflect assessed “ability to execute” and “completeness of vision,” but actual detection rates, false-positive/negative ratios, organizational integration, and cost-efficiency will vary by deployment.

However, Proofpoint may require more hands-on management than tools that run primarily autonomously. In fast-changing environments, adjusting its automation and custom rules can take time. Even so, Proofpoint remains one of the most trusted enterprise options.

Who is Proofpoint Email Protection recommended for?

Proofpoint Email Protection is best suited for medium-to-large organisations that face severe email threat exposure, want enterprise-grade capabilities, and have the resources to operationalise them.

It holds roughly 21.8% of the global email security market (according to a 2019 Frost & Sullivan analysis) and serves more than half of the Fortune 1000.

7. Mimecast Email Security & DLP

Best For: Medium to large organizations that handle high email volumes and sensitive data across multiple communication platforms.

Price: Not publicly listed

Mimecast Email Security & DLP Mimecast Advanced Email Security is a cloud-based email protection solution that defends your organisation against the full spectrum of email threats from spam and malware to sophisticated social-engineering, business email compromise (BEC), and zero-day attacks. It uses AI-driven detection, attachment sandboxing, URL rewriting, and anomaly detection across inbound, outbound, and internal email flows.

Mimecast’s integrated platform extends protection beyond email, connecting insights across collaboration tools for unified visibility and faster response. It’s recognized as a Leader in the 2024 Gartner Magic Quadrant for Email Security Platforms, cited for its completeness of vision and ability to execute. Mimecast offers multiple plans to suit organizations of all sizes and needs.

Key Features:

• AI-Powered Threat Detection: Uses machine learning, behavioral analytics, and social graphing to identify phishing, business email compromise (BEC), and zero-day threats before they reach users.
• Deployment Flexibility: You can choose between a secure email gateway (SEG) or API-based deployment, depending on your infrastructure and security needs.
• Anomaly and Impersonation Detection: It identifies unusual patterns, login attempts, or sender anomalies that could indicate insider threats or impersonation attempts
• Lifecycle Protection and Automated Remediation: Applies contextual warning banners, automated quarantines, and real-time URL or attachment scanning to prevent users from engaging with malicious content.
• Email DLP: The email DLP monitors outbound emails for sensitive or regulated data and automatically prevents accidental or unauthorized sharing of confidential information.
• Comprehensive Reporting and Analytics: Provides detailed visibility into attack trends, user risk levels, and policy effectiveness to support continuous improvement.

Unique Buying Proposition

Mimecast’s real advantage is the size and strength of its global network. When you use Mimecast, you become part of a community of over 42,000 organizations that share intelligence and benefit from proven, real-time protection (confirmed by Gartner, Mimecast’s corporate disclosures, and customer case studies). This global ecosystem helps Mimecast detect new threats quickly and refine its defenses using insights drawn from millions of real-world attacks.

Another defining competitive advantage is Mimecast’s focus on reducing human risk. Since most breaches start with people rather than technology, Mimecast goes beyond blocking malicious emails. It protects how your employees communicate and collaborate every day across Microsoft 365, Google Workspace, Teams, and other productivity tools. The idea is to ensure that your security strategy covers both people and platforms.

Feature‑In‑Focus: Mimecast’s multi‑layered threat detection

Mimecast Advanced Email Security uses AI-driven, multi-layered protection to stop sophisticated email threats before they reach users. It analyzes communication patterns (social graphing) to spot unusual behavior and employs advanced scanning to detect phishing, BEC, ransomware, zero-day attacks, and other malicious content.

Why do we recommend Mimecast Email Security & DLP?

We recommend Mimecast Advanced Email Security because it consistently proves effective in complex, real-world conditions. Analysts and customers have independently recognized Mimecast for being able to reduce both attack volume and the impact on workloads through automation and advanced detection.

A Forrester Consulting study found that organizations using Mimecast saw a 255% return on investment over three years. In one real-world case, a global wealth management firm used Mimecast to give its small security team complete visibility and faster threat response across the company through its API integrations.

Nonetheless, real-world ROI can vary widely depending on organization size, threat landscape, and integration maturity. Secondly, it is also important to note that Mimecast’s full value depends on user awareness and cooperation. If employees ignore warning banners or phishing simulations, the effectiveness of risk reduction may be limited.

Who is Mimecast Email Security & DLP recommended for?

Mimecast Advanced Email Security is best suited for medium to large-sized organizations that handle high email volumes, manage sensitive data, and operate across multiple communication platforms.

However, you benefit most if you have a dedicated or semi-dedicated security team that can leverage Mimecast’s analytics, policy controls, and automation features. Smaller businesses can still use it, but they may find its advanced capabilities and cost more than they need unless they face advanced phishing or compliance-driven risks.

The Mimecast Secure Email Gateway is delivered on a Software-as-a-Service model, so you don’t need to install any software. While most of the services on this list are aimed at SMBs, Mimecast is definitely suitable for large organizations.

8. Forcepoint DLP for Email

Best For: Medium to large-sized organizations that handle sensitive, regulated, or proprietary information

Price: Not publicly listed

Forcepoint DLP for Email prevents sensitive or confidential information from leaving an organization through email. It monitors, analyzes, and controls outbound email traffic to detect potential data exfiltration. Emails, including attachments, are scanned using multiple detection techniques, and security policies are applied automatically based on the results.

The solution can be deployed in the cloud or operated within your organization’s infrastructure. Forcepoint provides professional services to support implementation. According to the IDC MarketScape: Worldwide DLP 2025 Vendor Assessment, Forcepoint was recognized as a leader in the data loss prevention category.

Key Features:

• Centralized Policy Management: You can create, update, and enforce all email security rules from a single dashboard.
• Content and Attachment Scanning: The system inspects both email bodies and file attachments to identify sensitive or regulated data before it leaves your network.
• Integration with Major Platforms: It connects smoothly with Microsoft 365, Gmail, and other popular email services.
• Automated Policy Enforcement: Once a violation is detected, the solution can automatically block, quarantine, or encrypt the email, or allow it with justification, reducing manual intervention.
• Cloud and On-Premises Deployment: You can run it in the AWS cloud or install it on your own infrastructure, depending on your data sovereignty or compliance requirements.

Unique Buying Proposition

Forcepoint DLP for Email is designed for organizations that take data protection seriously and need a dependable way to prevent sensitive information from leaving their network through email. From experience with enterprise-grade security systems, centralized policy control makes or breaks a DLP strategy. Forcepoint addresses this by offering a single dashboard where you can define, apply, and adjust protection rules across your entire organization.

Based on industry best practices and independent assessments, Forcepoint’s true strength lies in its adaptability. Nonetheless, it’s important to note that this tool focuses on outbound protection, which prevents leaks but doesn’t replace inbound defenses such as phishing and malware filters. When used with a full email security solution, Forcepoint DLP for Email adds a strong layer of protection to keep your organization’s data safe as it moves through email.

Feature‑In‑Focus: Agentless, unified email DLP

Forcepoint DLP for Email provides automated monitoring and control of sensitive information in email communications. Using a set of predefined classifiers and centralized policy enforcement, it identifies and can block or quarantine emails containing regulated or confidential data across multiple platforms, including Microsoft 365 and Gmail.

Why do we recommend Forcepoint DLP for Email?

We recommend Forcepoint DLP for Email as an email monitoring tool because it provides continuous oversight of outbound email traffic with a focus on protecting sensitive information.

Although its core function is data loss prevention, it also serves a monitoring function similar to that of traditional email supervision tools. It scans messages and attachments to identify potential policy violations. When risks are detected, it enforces security actions such as blocking, quarantining, or encrypting emails.

Who is Forcepoint DLP for Email recommended for?

Forcepoint DLP for Email is recommended for medium to large-sized organizations that handle sensitive, regulated, or proprietary information and need to prevent data leaks via email. The solution is intended for security and compliance teams that require centralized visibility, policy control, and automated enforcement to securely manage and monitor outbound email communications.

Choosing email monitoring software

Your decision to monitor your company’s email will be driven by a need for spam filtering, data loss protection, or both. Your security priorities will dictate which of these products suit you best. You might also consider whether an appliance would be of more interest to you or whether you think that you would prefer an edge service cloud solution.

The options on our list of recommendations are all excellent email security services. Whichever you choose, getting protection from attack or data theft through email should be your priority.

Here’s a side-by-side comparison of the email monitoring tools covered in this guide

Our methodology for choosing the best email monitoring software

We used a structured process to identify email monitoring platforms that offer reliable performance and practical usability. The goal was to assess long-term strategic value, not just features. Our evaluation focused on: Core Monitoring Capabilities: We assessed how well the tools detect sensitive or high-risk email content across inbound, outbound, and internal communications.

• Policy Flexibility and Customization: We evaluated how easily you can adjust data-handling rules as business needs or regulations change.
• Data Governance and Global Support: Reviewed alignment with multi-tenant, cross-border, and compliance-specific environments.
• Incident Response and Visibility: Examined the depth of insights into user behavior, data-movement trends, and event traceability.
• Threat Detection Maturity: Considered the use of analytics and intelligence to identify emerging or subtle threats.
• Scalability and Operational Fit: Evaluated ease of deployment, integration with existing workflows, and support for organizational growth.
• Vendor Maturity and Updates: Finally, we reviewed the provider’s development pace, roadmap clarity, and responsiveness to evolving threats.

Broader B2B Software Selection Methodology

We evaluate B2B software using a consistent, objective framework that focuses on how well a product solves meaningful business problems at a justified cost. This includes assessing overall performance, scalability, stability, and user experience quality. We examine real-world feedback from practitioners to understand how the software behaves outside of controlled demos.

We also review vendor transparency, roadmap clarity, support responsiveness, and the pace at which meaningful improvements are released. This approach ensures each recommendation is grounded in practical value, long-term viability, and operational impact, not marketing claims.

Check out our detailed B2B software methodology page to learn more.

Why Trust Us?

Our work is produced by a team of IT and business software professionals with extensive hands-on experience evaluating, deploying, and managing enterprise technology. We analyze software independently, using evidence-based methods and industry best practices to ensure our assessments remain unbiased and technically sound.

Our goal is to provide you with clear, reliable insights that help reduce risk, shorten evaluation cycles, and support confident decision-making when selecting complex business technology.

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