OpenText Core Email Threat Protection
OpenText Core Email Threat Protection: A Microsoft 365-focused gateway combining filtering, remediation and centralized oversight. Ranked #8 of 20 in Cloud Email Security by our editors (8.6/10); pricing: Pricing on request; best for microsoft 365-focused email security.
At a glance
- Editor score8.6 / 10
- PricingPricing on request
- Best forMicrosoft 365-focused email security
- Deployment modelGateway
- Founded1991 · Waterloo, Ontario, Canada
- Facts checked24 Sep 2026
Where it wins
- Filters inbound, outbound and internal messages with multilayer threat detection
- Click-time link scanning plus attachment disarming and sandbox analysis
- Retracts delivered Microsoft 365 messages and protects against impersonation
Where it doesn't
- Subscription pricing requires contacting OpenText or a partner
- Email platform coverage centers on Microsoft 365
- Support is provided through tickets, even with 24/7 availability
Our verdict on OpenText Core Email Threat Protection
OpenText Core Email Threat Protection is a cloud-deployed gateway service for businesses of all sizes, including MSPs and VARs, that use Microsoft 365. It filters inbound, outbound and internal email, detecting phishing, ransomware, zero-day malware, viruses, impersonation, business email compromise, spoofing and spam. Machine learning, traffic analysis, link inspection and attachment analysis work across the mail flow, while central dashboards, logging and reporting give administrators a consolidated view.
The service uses subscription licensing with purchasing handled through OpenText or a partner. Microsoft 365 is the primary email integration, and LDAP/Active Directory support can connect identity information to policy and protection workflows. Administrators manage the service through the web, with mobile access available for management tasks. A ticket-based support channel is available around the clock, which may suit organizations that want continuous coverage but prefer structured support requests.
Its strongest distinction is the breadth of controls within a Microsoft 365 workflow. Link rewriting scans destinations at click time, attachments can be quarantined, disarmed or sandboxed, and identity and domain impersonation defenses address business email compromise. Internal user-to-user filtering and outbound controls extend protection beyond the perimeter, while message retraction can remove emails already delivered to Microsoft 365 mailboxes. Organizations seeking layered protection and centralized oversight around Microsoft 365 should find the feature set well aligned. Teams running other primary email platforms should evaluate services with broader platform coverage.
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OpenText Core Email Threat Protection pricing
OpenText Core Email Threat Protection fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Deployment model | Gateway |
| Threat detection | phishing, ransomware, zero-day malware, viruses, impersonation, business email compromise, spoofing, spam |
| Email platforms | Microsoft 365 |
| Post-delivery remediation | Yes |
| Data loss prevention | Not verified |
| Maximum users | Not verified |
| Deployment | Cloud |
| Platforms | Web |
| Support | Tickets · 24/7 |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 2 integrations: Microsoft 365, LDAP/Active Directory |
| Pricing | Pricing on request |
| Website | cybersecurity.opentext.com |
| Facts checked | 24 Sep 2026 |
OpenText Core Email Threat Protection integrations
OpenText Core Email Threat Protection lists 2 integrations on its own site.
- Microsoft 365
- LDAP/Active Directory
Alternatives to OpenText Core Email Threat Protection
- Mimecast Email SecurityBroad email protection with gateway, API, continuity, and 300 integrations.9.3
- Sophos EmailA broad cloud defense stack for organizations securing Microsoft 365 or Google Workspace mail.9.2
- Darktrace / EMAILBroad email and collaboration protection with behavioral detection and automated response.9.1
See all OpenText Core Email Threat Protection alternatives →
OpenText Core Email Threat Protection vs the competition
- OpenText Core Email Threat Protection vs Mimecast Email Security
- OpenText Core Email Threat Protection vs Sophos Email
- OpenText Core Email Threat Protection vs Darktrace / EMAIL
- OpenText Core Email Threat Protection vs Check Point Email Security
- OpenText Core Email Threat Protection vs Cloudflare Email Security (formerly Area 1)
- OpenText Core Email Threat Protection vs Perception Point Advanced Email Security
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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