Best 12 Email Security Solutions For MSPs (2026)

• M365 integration via MX record change with basic policy setup and immediate filtering.
• Multi-layered detection catches what Microsoft’s native filtering misses, particularly phishing simulations and zero-day threats.
• Outbound filtering and DLP with SPF, DKIM, and DMARC checks running automatically.
• Architecture scales across multiple tenants without adding per-tenant complexity.
• Pricing at $1.95 per user monthly at 250 users works for MSP billing models.

We think TitanHQ, powered by CyberSentriq, is well worth considering if you’re managing email security across multiple SMB clients and want solid inbound filtering without per-tenant complexity. The pricing makes it easy to build into MSP billing models. If you need advanced outbound DLP or enterprise-scale threat intel integrations, you’ll want to look elsewhere. For straightforward email security you can deploy across clients without ongoing hand-holding, TitanHQ, powered by CyberSentriq, delivers.

• Live tracker shows every email across all customer tenants in one searchable view with two-click cross-tenant remediation.
• Global policy templates apply automatically when onboarding new customers, with per-domain and per-organization customization.
• Three deployment options: MX-based gateway, API-only for Microsoft 365, and combined gateway-plus-API.
• Every administrator action on email content is audit-logged against the operator for accountability.

We would recommend Bitdefender for MSPs running Microsoft 365 who are looking for email security with easy management of multiple clients from a single dashboard, with cost-effective single-SKU pricing. It’s an even better fit for teams that are already reselling Bitdefender endpoint security. Overall, Bitdefender offers a strong solution, and MSPs frustrated with the license complexity, cost, or complexity of their email security platform should evaluate this seriously.

• Zero trust model filters emails by learning trusted sender patterns and routing unverified messages to junk.
• Users manage trusted senders via New Sender Review with real-time behavioral analysis blocking high-volume spam and phishing.
• Shield Pro adds Bundler for non-critical email digests and Lockbox for sensitive message MFA.
• Spy Tracker Blocking removes email tracking pixels.
• Multi-tenant dashboard with API support and GDPR, HIPAA, and PCI DSS compliance support.

We think Mailprotector Shield is a strong fit for MSPs seeking a zero trust email security platform that reduces spam and phishing without complex deployment. The user-driven trust model is effective against AI-generated spam where traditional rule-based filters struggle, and the multi-tenant dashboard keeps MSP administration straightforward.

• Inline filtering deployment gets operational in under five minutes without MX record changes.
• Spam and graymail detection with minimal false positives, powered by Cloudmark scanning over one billion messages per day.
• Predictive URL Defense sandboxes links before delivery and Advanced BEC Defense uses behavioral ML for impersonation detection.
• Email warning tags flag external emails and DMARC failures with color-coded banners.
• Granular per-tenant controls, solid reporting, and Filter Policies replace complex regex with flexible rules.

We found Proofpoint Essentials highly effective at blocking spam and phishing, with checks completing relatively quickly; it generally takes no more than 15 minutes to scan, sandbox, and deliver an unknown email with an attachment. The platform’s interface is simple and intuitive, which reduces per-client management overhead. With six pricing tiers from approximately $36 to $82 per user per year, it scales well across different client budgets. Proofpoint Essentials was designed for organizations up to 500 users but can be deployed effectively for larger businesses up to around 1,500 users. For MSP clients needing serious archiving or running at enterprise scale, Proofpoint Core Email Protection is worth evaluating instead.

• API deployment with no MX record changes enables MSPs to onboard new clients without disrupting mail flow.
• Themis virtual SOC conducts autonomous investigation and remediation, reducing per-tenant workload that eats into MSP margins.
• One-click employee reporting feeds into detection across 17,000+ customer organizations, so smaller clients benefit from larger account intelligence.
• Machine learning, AV engines, URL scanning with standalone spam and grey-mail filtering.
• Built-in AI phishing simulations and deepfake meeting protection for Microsoft Teams.

We are impressed by IRONSCALES. The platform is constantly adding new features, like email spam filtering, encryption, and deepfake protection. The core of the product is the crowdsourced threat intelligence built on end-user email reporting, which is an effective way of blocking phishing, alongside powerful threat protection engines. If you are an MSP looking for a dedicated email security tool that deploys quickly across client environments with built-in phishing awareness training, IRONSCALES delivers. The free Starter tier offers phishing simulation and testing for up to 500 mailboxes, though full email protection requires a paid plan.

• Automatic account isolation with forced logout and password reset when accounts show signs of compromise.
• URL rewriting and visual warning banners give users context without blocking everything.
• Campaign-level remediation pulls all related phishing messages after one is flagged, saving MSP teams investigation time across client environments.
• AI mailbox handles reported messages with low false positive rates.

MSP teams consistently praise detection accuracy. Technicians report spending far less time managing email queues and chasing false positives compared to traditional gateways like Mimecast or Barracuda. Setup runs fast via API integration. Some customer reviews note that the interface needs better responsiveness, and outbound email monitoring is missing. Based on customer feedback, filtering settings don’t always persist between menus, creating friction when searching. Pricing sits at the premium end.

We think Abnormal is well worth considering for MSPs whose clients face sophisticated social engineering attempts. The behavioral AI catches attacks that signature-based tools miss entirely, and the low false positive rates reduce alert fatigue across your managed accounts. It won’t suit clients using email platforms outside M365 or Google Workspace. For MSPs managing those environments, it delivers real operational efficiency alongside strong detection.

• ML-based phishing detection with zero-day and BEC detection identifying subtle threats that bypass native Microsoft protections.
• URL protection and sandboxing add depth beyond basic filtering.
• API integration with M365 deploys without mail flow changes or complex setup.
• Cross-channel visibility across email, Teams, and shared files helps with audit and compliance reporting across client environments.

Customers say the interface is simple and integration is quick. Account teams get strong marks for responsiveness. Organizations highlight how rarely emails bypass the filters during normal operations. Some customer reviews note that the reporting interface is difficult to work with for detailed analytics, and large attachment handling can cause performance issues at scale.

We think Check Point Email Security fits MSPs managing clients on Microsoft 365 and collaboration tools who want unified protection from a single console. If your existing security stack already runs on Check Point, the integration story gets stronger. The DLP capabilities add visibility for clients where data loss prevention is on the roadmap. It’s well worth considering for MSPs expanding into broader workspace security.

• Bulk policy application across all tenants cuts daily administration time.
• Outlook add-in lets users report suspicious emails from within their inbox without a separate tool.
• Covers spam filtering, backup, archiving, encryption, and permission management in one interface.
• 99.99% spam detection and 99.9% virus detection with real-time Advanced Threat Protection sandbox.
• AI risk scoring helps teams triage flagged emails without reading each one individually.

Customers say the multi-tenant policy management is the standout operational benefit, and junk mail volumes drop sharply after rollout. Integration across Outlook, Teams, and SharePoint runs reliably with minimal training required. Some users report that reporting lacks the depth needed for thorough log reviews. Based on customer feedback, backup navigation makes locating specific restore points slower than expected, and initial setup requires real effort.

We think Hornetsecurity is a strong fit for MSPs running Microsoft 365 environments who need email security, backup, and permissions consolidated in one platform. The Proofpoint acquisition adds enterprise credibility and should expand global integration options over time. If your environment sits outside Microsoft 365, look elsewhere. For multi-tenant efficiency and platform consolidation, it’s well worth considering.

• Scans historical mail for sensitive data like tax records and invoices, then wraps content with MFA.
• API deployment in under 30 minutes with no MX changes.
• Real-time remediation clusters similar malicious messages across managed clients automatically.
• SIEM, SOAR, and identity tool integrations feed into existing MSP security stacks.

MSP teams value the automatic clustering of similar malicious messages across client organizations. The Google Workspace integration gets praise as a first-class experience, not an afterthought. Support gets high marks for responsiveness and acting on feedback. Some customer reviews note that the ticketing dashboard needs polish for multi-client workflows, and initial setup can overwhelm less technical teams.

We think Material is well worth considering if you’re managing M365 or Google Workspace clients and want one platform covering email, data, and identity risks per tenant. It treats Google Workspace as a first-party integration. If clients need protection beyond cloud productivity suites, you’ll need to pair it with additional tools. For its target use case across managed M365 and Google environments, Material delivers.

• Safe Links rewrites URLs at click time and Safe Attachments detonates suspicious files in a sandbox.
• Automated Investigation and Response reduces manual workload for security teams.
• Real-time scanning catches phishing, malware, and zero-day exploits before they reach users.
• SIEM integration with tools like Splunk works smoothly.
• Plan 1 at $2/user/month covers basics; Plan 2 at $5/user/month adds investigation and response.

MSPs consistently praise the ease of deployment across client tenants. Threat analysis reports help teams understand what’s hitting each client environment. Some customer reviews note that configuration and policy management complexity overwhelms new administrators. According to customer feedback, alert noise makes it difficult to distinguish high-priority threats from low-risk items.

We think Defender works well for MSPs whose clients are standardized on Microsoft. The native integration is hard to beat, and you avoid adding another vendor to your stack. If you need granular policy control or face sophisticated targeted attacks, a dedicated third-party solution alongside it adds value. For most M365 environments, this delivers solid protection without adding complexity.

• Scanning within the M365 tenant catches internal threats that gateway solutions miss.
• Phishing, impersonation, and malware detection across all mail directions.
• DLP content examination filters catch credit cards and SSN in transit.
• 350+ security vendor integrations across endpoint, XDR, SIEM, SOAR, and identity tools.
• CrowdStrike integration and Outlook reporting plugin simplify investigation workflows.

Customers say daily monitoring and policy management are straightforward, and phishing protection runs with low noise. Small security teams praise the out-of-the-box effectiveness. Implementation with M365 draws positive feedback for minimal disruption. Some customer reviews note that archive retrieval requires Mimecast professional services if switching providers, which is worth weighing for MSPs managing client migrations.

We think Mimecast fits MSPs whose clients need email security bundled with compliance tools. If archiving, eDiscovery, and encryption are on the requirements list alongside threat detection, this consolidates what would otherwise be three or four separate vendors. The March 2026 update addressing API deployment and 350+ vendor integrations strengthens the platform’s position in modern security stacks. It’s well worth considering for compliance-heavy MSP client bases.

• MQL query language for custom detections, automated triage workflows, and Slack or email alert integration.
• AI-assisted policy builder combines MQL with GenAI to simplify rule creation without sacrificing control.
• Threat hunting with search and backtesting to proactively find attacks that slipped through.
• API integration connects email intelligence into broader security platform alongside identity and endpoint detections.
• Over 700 built-in rules give teams a strong starting point.

Customers say the POC experience is eye-opening, with multiple teams discovering threats their existing tools missed within days of deployment. Support earns consistent praise for responsiveness and technical depth. Some customer reviews note that the query language requires investment to use effectively for custom rules, and the post-delivery API model means emails can arrive in inboxes before scanning completes.

We think Sublime fits MSPs with security engineers who want full visibility into detection logic and the ability to tune rules across client environments. If your team prefers transparency over convenience, this delivers. The free tier for single accounts lets you evaluate before committing to enterprise pricing. Organizations wanting awareness training and broader tooling bundled in will need to pair Sublime with other vendors.