Client Zero ChangeOpen StandardBuilt-in Enterprise CAAutomated PKI
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.

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.
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.

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.

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) 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 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.
A digital signature helps recipients verify: ◆ Who signed the email and document◆ Whether the email and document was altered after signing
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.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.
Enterprise deployments use redundant dual gateway architecture to ensure continuous cryptographic services: Dual Gateway Cluster, High availability, Load balancing, Service continuity
The Gateway integrates hardware security modules (HSMs) to protect critical CA keys and support secure certificate issuance and lifecycle management.
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.
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.
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.
S/MIME Encryption and Document Signing for Every Organization, Automated. AI, Your Key.