GCC and GCC High support
Built for regulated Microsoft 365 organizations that need stronger deployment control.
Microsoft 365 signature enforcement
Server-side email signature enforcement for regulated Microsoft 365
Sigora applies signatures in outbound Microsoft 365 mail flow without Outlook add-ins or endpoint agents. Choose managed, dedicated SaaS, self-hosted, or self-hosted HA deployment to match your infrastructure and data-boundary requirements.
Centralized enforcement without client-side complexity
Flexible deployment paths
Use Managed SaaS, Dedicated SaaS, Self-Hosted, or Self-Hosted HA.
No Outlook add-ins
Enforce signatures without endpoint agents or client-side dependencies.
Server-side enforcement
Apply signatures after Microsoft 365 routes selected outbound messages through Sigora.
Consistent signatures
Centralize template, rule, and sender-based signature behavior.
No persistent message storage
Process message content in memory without storing bodies or attachments.
The challenge
Signature management becomes an infrastructure decision
In regulated Microsoft 365 environments, signature enforcement is not just a branding problem. It affects mail flow, data handling, deployment boundaries, and operational control.
- Endpoint behavior can be inconsistent
- Infrastructure boundaries may not match internal requirements
- Deployment options may be too limited for GCC High teams
- Message handling needs to be clear before rollout
The Sigora approach
Server-side enforcement with deployment choice
Sigora applies signatures in the mail flow and gives organizations a deployment model that fits their operating environment.
- Server-side processing
- Direct GCC and GCC High support
- Managed and self-hosted deployment paths
- No persistent message body or attachment storage
Architecture
How Sigora works
Microsoft 365 / Exchange Online
- Selected outbound messages route through Sigora
- Microsoft 365 remains the mail system of record
Outbound mail flow
Sigora Signature Processing
- Identify sender and matching rules
- Render the assigned signature template
- Apply the signature server-side
- Process content without persistent body or attachment storage
Return to Microsoft 365
Microsoft 365 Outbound Delivery
- Message continues through configured outbound delivery
- Delivered to external recipients
Sender Resolution
Rule Evaluation
Template Rendering
Signature Injection
Audit Visibility
Transit-Only Handling
Deployment
Deployment options that match your boundary
Managed / SaaS
- Managed SaaS / Shared SaaS
- Dedicated SaaS for single-customer infrastructure
- Sigora-operated hosting and platform operations
- No customer-managed servers
Self-Hosted
- Self-Hosted All-in-One
- Self-Hosted HA / Distributed
- Customer-controlled infrastructure
- Strong fit for strict data-boundary requirements
Trust model
Security posture without unnecessary data custody
Sigora is designed around controlled mail flow, reviewable infrastructure, and limited message handling.
TLS in transit
No persistent message storage
Least-privilege access
Audit logging
Self-hosted available
Evaluation path
Move from product fit to deployment planning
- Confirm environment
- Select deployment path
- Review mail flow
- Confirm data handling
- Plan rollout
Ready to evaluate server-side signature enforcement?
Review deployment model, pricing path, and mail-flow requirements with the Sigora team.