ZTmail Cryptographic Application Automation Gateway

A hardware gateway for enterprise cryptographic applications, providing automated cryptographic security for emails, chats, and documents.

Client Zero ChangeOpen StandardBuilt-in Enterprise CAAutomated PKI

One Gateway. Three Services. Fully Automated.

ZTmail Cryptographic Application Automation Gateway sits between an organization's existing security infrastructure, business systems, and external networks. It automates digital signing, encryption, decryption, signature validation, certificate management, and trusted identity management for email, chat, and documents, while working in conjunction with the corresponding systems already in place.

Built-in dedicated sub-CA and HSM-protected keys automatically issue and manage ZTmail-trusted S/MIME certificates and document certificates for the organization, without quantity limits.
Optionally for global-trusted S/MIME certificates and document certificates to meet global trust application needs.
Centralized management of private keys for email and document encryption.
Automate cryptographic operations for email, chat, and documents, including digital signing, encryption, decryption, signature validation, and timestamping.
Work with an existing email security gateway to decrypt and inspect inbound encrypted email, and inspect outbound email before encrypting it.
Work with existing business systems to automate bulk signing and encryption of business documents.
Employees can continue using their existing email clients and document readers without managing email or document certificates themselves.

One Gateway. Configurable to Meet Different Needs.

ZTmail Cryptographic Application Automation Gateway is an integrated, multifunctional gateway solution. Customers can select the functional components that best meet their specific application requirements, including an S/MIME Automation Gateway, a Document Cryptographic Application Automation Gateway, an Enterprise Instant Messaging Encryption Gateway, an Enterprise Key Management System, and a Timestamping Service System.

S/MIME Automation Gateway

Built-in enterprise CA for local, automated S/MIME certificate issuance.
Provide trusted digital email identities at organizational scale and centrally manage keys.
Automatically sign, encrypt, decrypt, and validate signatures on email.
Employees keep their existing email clients and do not need to manage S/MIME certificates.

Document Cryptographic Application Automation Gateway

Built-in enterprise CA for local, automated document certificate issuance.
Provide trusted digital document identities at organizational scale and centrally manage keys.
Automatically perform bulk document signing, encryption, decryption, and signature validation.
Each employee can have document encryption and signing certificates.

Enterprise Instant Messaging Encryption Gateway

Built-in enterprise CA for local, automated S/MIME certificate issuance.
Provide trusted digital email identities at organizational scale and centrally manage keys.
Support chats between ZTmail App users, and between ZTmail App and existing email clients.

Enterprise Key Management System

Centrally manage email and chat certificate keys.
Provide private keys to the ZTmail App.
Manage S/MIME certificates.
Key archival management.
Support document encryption and other data encryption.

Timestamping Service System

Provide a local timestamping service for document signing.
Includes a ZTmail-trusted timestamping certificate.
Automated timestamping certificate management (application and renewal).

S/MIME Automation Gateway

ZTmail S/MIME Automation Gateway sits between an organization's existing email security infrastructure and external networks. It automates S/MIME encryption, decryption, digital signing, and S/MIME certificate management, allowing employees to continue using their existing email clients.

Don't Replace. Complete. Let Each System Do What It Does Best.
ZTmail S/MIME Automation Gateway Works with the Existing Email Security Infrastructure.

ZTmail S/MIME Automation Gateway adds the cryptographic application layer without replacing the email security systems already used. All employees still use their usual email clients, but now emails are automatically encrypted during transmission and storage.
Inbound
Decrypted by ZTmail Gateway
→ Security Inspection → Deliver
Outbound
Security Inspection → Signed & Encrypted by ZTmail Gateway → Send
Works with existing email security infrastructure.
Add S/MIME Automation. Keep Your Existing Security Infrastructure.

Document Cryptographic Application Automation Gateway

ZTmail Document Cryptographic Application Automation Gateway is designed for large and medium-sized organizations that need to digitally sign documents in bulk. It also provides the in-house document certificate issuance and key management required to support organization-wide document signing and encryption. The gateway automates document digital signing, timestamping, encryption, decryption, signature validation, and certificate lifecycle management.

Built-in dedicated sub-CA and HSM-protected keys automatically issue and manage ZTmail-trusted document certificates for the organization, without quantity limits.
Connect to ZTmail cloud cryptographic services to automatically obtain Adobe-trusted document signing certificates for use cases requiring global trust.
Centralized management of private keys for document encryption.
Automatically sign and encrypt PDF documents generated by business management systems in bulk.
Employees can manually sign and encrypt documents using ZTmail App.
An integrated timestamping system is optional and can provide local timestamping for document signatures.

Enterprise Instant Messaging Encryption Gateway

ZTmail Enterprise Instant Messaging Encryption Gateway is designed for instant messaging management in medium-sized and large organizations. Built on the organization's email infrastructure, it provides encrypted chat services for both internal and external communications. It also provides the in-house S/MIME certificate issuance, automated certificate management, and key management required to enable encrypted chat across the organization.

ZTmail Enterprise Key Management System (EKMS)

ZTmail Enterprise Key Management System (EKMS) is designed to provide centralized cryptographic key management for medium-sized and large organizations. Encryption keys are generated and managed within the EKMS. The ZTmail App retrieves employees' certificate keys from the EKMS for use on their local devices.

ZTmail Timestamping Service System

ZTmail Timestamping Service System is designed to provide local timestamping services for medium and large organizations. It comes with a built-in ZTmail-trusted timestamp signing certificate, offering timestamp signing services for batch document signing or other applications. It can also provide local timestamping services for employees using ZTmail App or other software.

From “Who Is This?” to an Actionable Security Signal S/MIME certificates can represent different levels of identity validation for each email. Document signing certificates can represent different levels of identity validation for each document.

MV

Mailbox Validated

IV

Individual Validated

OV

Organization Validated

SV

Sponsor Validated

ZTmail Gateway can use these trust identity signals as part of configurable email security and document security policies.

  • Higher-assurance identity→ Allow / Prioritize
  • Unknown or unverified identity→ Inspect / Warn
  • Invalid signature→ Alert / Quarantine

Every Email, Every Document, Can Carry a Trusted Digital Identity.

Many organizations send emails and documents to people outside the organization. To make sure emails and documents are trusted, use ZTmail Cryptography application automation gateway to automatically digitally sign public emails and public documents.

Government

Official notices, application results and public-service communications.

Banking

Statements, transaction notifications and customer communications.

Utilities & Public Services

Bills, service notifications and account communications.

Enterprise

Legal, financial, executive and other high-trust communications.

A digital signature helps recipients verify: ◆ Who signed the email and document◆ Whether the email and document was altered after signing

Digital signatures don't just protect email and document integrity, also prove the trusted identity behind it.


Built-in CA for Your Organization. Public CA When You Need It.

Certificate Automation from Issuance to Renewal
With its built-in enterprise CA, the ZTmail Gateway automatically issues and manages organizational trusted S/MIME certificates and document certificates for employees — at organizational scale for S/MIME automation and Document signing automation.

Organization Setup

Establish a dedicated ZTmail Trust Domain for your organization.

Identity & Policy

Define employees and the trusted identity level for their S/MIME certificates and document certificates.

Issuance

Gateway automatically issues ZTmail-trusted S/MIME certificates for employees.

Deployment

Gateway automatically manages certificates and private keys for S/MIME operations and document signing.

Renewal

Certificates are automatically renewed before expiration.

Revocation

The organization can revoke certificates whenever necessary.

Built-in CA for Your Organization. Public CA When You Need It.

ZTmail Gateway's built-in enterprise CA automatically issues and manages ZTmail-trusted S/MIME certificates and document certificates for employees across your organization. For a small number of mailboxes that need global trust for external communication, Gateway can automatically obtain globally trusted S/MIME certificates and document certificates from Public CAs.

One Gateway. Two Certificate Sources. Multiple Trust Models. One Optimized Certificate Strategy.

Built-in Enterprise CA

  • S/MIME and document certificates across the organization
  • ZTmail ecosystem trust and organizational trust
  • Automated issuance and lifecycle management
  • No per-certificate fees; unlimited issuance

External Public CA

  • Selected mailboxes for external communications
  • Globally trusted MV S/MIME certificates, with OV/SV certificates optional
  • Optional globally trusted cloud document e-signing service or globally trusted OV/SV document certificates
Organizational Trust by Default. Global Trust When Needed. Multiple trust models and automates certificate lifecycle across organizational and global trust environments.

Dedicated Hardware Cryptographic Infrastructure for Organizational Trust

ZTmail Cryptographic Application Automation Gateway is delivered as a dedicated hardware cryptographic appliance, providing a secure foundation for your organization's email and document trust domain. With built-in enterprise CA capabilities and hardware-protected CA keys, the Gateway automatically issues and manages organizational trusted and global trusted S/MIME certificates and document certificates for your organization.

High Availability Architecture

Enterprise deployments use redundant dual gateway architecture to ensure continuous cryptographic services: Dual Gateway Cluster, High availability, Load balancing, Service continuity

Secure Cryptographic Foundation

The Gateway integrates hardware security modules (HSMs) to protect critical CA keys and support secure certificate issuance and lifecycle management.

Optional: SOFTWARE CRYPTOGRAPHIC GATEWAY

Client-Cloud based certificate automation for growing organizations that do not require dedicated hardware CA infrastructure, ZTmail Software Cryptographic Application Automation Gateway provides automated S/MIME certificate and document certificates management through ZTmail Cloud Cryptographic Service including certificate application, issuance, renewal, revocation etc.

One Gateway. Two Trust Domains.

  • ZTmail Trust: ZTmail-trusted OV/SV S/MIME certificates and document certificates are issued through ZTmail Cloud Cryptographic Service, trusted identity within the ZTmail ecosystem
  • Global Trust: S/MIME certificates and document certificates from public CAs for external communication requirements. Publicly trusted certificates for external interoperability

AI Ensures Email Security and Document Security

Bring Your Own AI Provider and API Key.

AI security is optional. If your organization already has an email security gateway, keep using its security and AI capabilities.

If you do not have one, ZTmail Gateway can optionally integrate AI-powered email and document analysis using your preferred AI provider and your own API key.

Possible applications include:
Phishing AnalysisBEC AnalysisSuspicious Email DetectionEmail Content AnalysisDocument Content Analysis
Your AI Provider. Your API Key. Your Choice.

One Gateway. Complete Cryptographic Lifecycle Management.

AUTOMATE
Certificate issuance · deployment · renewal · revocation
PROTECT
S/MIME encryption · decryption · private key security · hardware-protected CA keys
PROVE
Digital signature · signature validation · trusted identity
ADAPT
Built-in Enterprise CA · Organizational Trust · Global Trust · Hybrid Trust

Ready to Build Trusted Cryptographic Infrastructure at Scale?

ZTmail helps organizations automate S/MIME encryption, document signing, trusted identity, and certificate management with flexible Gateway deployment options.

From dedicated hardware cryptographic infrastructure to cloud-based certificate automation, build the trusted email and document environment your organization needs.

Start Your Enterprise Trusted Email and Document Journey

S/MIME Encryption and Document Signing for Every Organization, Automated. AI, Your Key.

Talk to Our Enterprise Team