Not every employee should be able to email anyone. Service accounts, automated systems, and certain staff roles need restricted communication channels. Without proper controls, a misconfigured account or malicious insider can cause devastating data leaks.
SecZim's Sender Restrictions give you precise control over who can send to whom.
The Data Leak Scenario
Your automated notification system has email access. A misconfiguration causes it to send customer data to an external address. Without sender restrictions, there's nothing stopping this. With SecZim, the email is blocked before it leaves your server.
How Sender Restrictions Work
Define rules that limit which recipients a sender can reach. If a sender tries to email someone not on their allowed list, the message is rejected with a customizable error message.
Real-World Use Cases
Service Accounts
Automated systems like backup notifications, monitoring alerts, and CRM updates should only email internal addresses or specific external contacts. Restrict them to prevent misuse if compromised.
Temporary Staff
Contractors and interns often need email but shouldn't communicate externally. Restrict them to internal domains only during their assignment.
Department Isolation
Finance teams handling sensitive data can be restricted to internal communication and specific banking partners only.
Compliance Requirements
Healthcare, legal, and financial organizations often require strict email controls for regulatory compliance. Document exactly who can email whom.
Flexible Recipient Matching
Define allowed recipients with precision:
- → Exact addresses:
john@partner.com - → Entire domains:
*@company.com - → Domain wildcards:
*@*.company.com(all subdomains) - → Distribution lists:
sales-team@company.com
Custom Rejection Messages
When a restricted sender tries to email an unauthorized recipient, they receive a clear message explaining why. Customize this message to provide guidance:
Instant Application
Sender restrictions take effect immediately when created or modified. No server restarts, no delays. Block a compromised account in seconds.
Easy Management
Manage all sender restrictions through SecZim's web dashboard:
- → View all restrictions at a glance
- → Add or remove allowed recipients instantly
- → Enable/disable restrictions with one click
- → See violation logs for each restricted sender
Integration with Other Controls
Sender restrictions work alongside SecZim's other security features:
- → Rate limiting: Restricted senders still respect rate limits
- → Logging: All restriction violations are logged
- → Alerts: Get notified when restrictions are triggered
- → Audit trail: Complete history for compliance audits
Take Control of Email Flow
Prevent data leaks and enforce communication policies with granular sender restrictions.
Start Free TrialThe Principle of Least Privilege
In security, accounts should have only the access they need—nothing more. Sender restrictions apply this principle to email. Not every account needs to email the entire internet.
Control the flow. Prevent the leak. Protect your organization.