OpenText Core Email EncryptionOpenText
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Related Products
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About
Aster Mail is a free, open-source, end-to-end encrypted email service for people who want real privacy without the technical overhead. All encryption happens on your device before anything reaches our servers, so we have zero access to your messages or metadata.
Aster uses standard OpenPGP with portable RSA-4096 keys, so you're never locked in. Your keys work with GPG, Thunderbird, or any PGP client, and they're discoverable through WKD and public keyservers. Aster-to-Aster messages use a Signal-inspired X3DH and Double Ratchet protocol for forward secrecy.
Every plan includes encrypted email, custom domain support, free aliases, tracker protection, and full access across web and desktop. The entire codebase is published under AGPL v3 on GitHub, fully auditable, with a public warrant canary and documented vulnerability disclosure.
Free plan includes 10 GB encrypted storage, 5 aliases, and 1 custom domain. Paid plans start at $2.99/month. Servers located in Germany.
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About
OpenText Core Email Encryption protects sensitive information by automatically encrypting emails based on customizable DLP policies and content filters. It secures outbound communication without interrupting user workflows, ensuring compliance for regulated industries such as healthcare, finance, and government. The platform evaluates email subjects, bodies, and attachments in real time to determine whether to encrypt, quarantine, or block messages. Its Best Method of Delivery engine selects the most secure transmission option—S/MIME, TLS, or a secure messaging portal—to guarantee protected delivery to any recipient. Users can communicate securely across devices, while administrators gain full visibility through graphical reporting and compliance dashboards. By reducing human error and automating enforcement, the solution strengthens security posture and supports safe collaboration inside and outside the organization.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Privacy-conscious users
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Audience
OpenText Core Email Encryption is ideal for organizations in regulated or data-sensitive industries that need automated, reliable protection for confidential email communication
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and VideosNo images available
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Pricing
No information available.
Free Version
Free Trial
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Pricing
No information available.
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationAster Mail
Founded: 2025
United States
astermail.org
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Company InformationOpenText
Founded: 1991
Canada
cybersecurity.opentext.com/products/email-security/email-encryption/
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Integrations
HostBill
OpenText Core Email Threat Protection
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