91%
Of cyberattacks start with email
100%
Tamper-proof signature deployment
0
Unauthorized signature modifications
Security-First Email Signature Management
Tamper-Proof Signatures
Employees cannot modify, replace, or remove their managed signatures, preventing impersonation and ensuring consistent sender identity.
Centralized Control
Only authorized administrators can create, modify, and deploy signatures. No shadow IT or rogue signature edits.
Role-Based Access Control
Define who can manage signatures with granular permissions. Limit access to trusted administrators and compliance officers.
Signature Integrity Monitoring
Monitor all signature deployments and changes. Get alerts if any anomalies or unauthorized modifications are detected.
Complete Audit Trail
Every signature creation, modification, deployment, and deactivation is logged for security review and incident investigation.
Email Signature Security Best Practices
Use centrally managed signatures instead of user-edited ones
Lock all brand elements to prevent impersonation
Maintain an audit trail of all signature changes
Implement role-based access control for signature administration
Automatically deactivate signatures for departed employees
Regularly review and update signature compliance policies
"We experienced a phishing incident where someone impersonated our CEO using a copied email signature. After switching to Siggly, our signatures are centrally controlled and tamper-proof. That attack vector is now closed."
Adriana Costa
CISO, Sentinel Risk Advisors
Frequently Asked Questions
How does Siggly prevent email signature impersonation?
Siggly centrally manages all signatures so employees cannot create or modify their own. This eliminates the risk of anyone copying or forging a company signature for phishing purposes.
Can employees modify their managed signatures?
No. Managed signatures are deployed centrally and cannot be edited, replaced, or removed by employees. Only authorized administrators can make changes.
Does Siggly maintain a log of all signature changes?
Yes. Every action taken on signatures including creation, modification, deployment, and deactivation is logged with timestamps and user attribution for complete auditability.
How does role-based access control work?
You define which team members have admin access to manage signatures. Permissions can be scoped by department, location, or function to ensure least-privilege access.