Data Sovereign Email Signatures and Out-of-Office Replies

Unified Outlook branding everywhere – with zero external data exposure

Peer-Reviewable Core   Agentless Sync   No Mail Rerouting   Sovereign Cloud Ready

With the free and open-source Set-OutlookSignatures and the Benefactor Circle add-on, you turn email signatures and out-of-office replies into a centrally managed business asset — without external data transfer.

By leveraging Microsoft Roaming Signatures and our own direct-to-mailbox technology, we provide the world's only sovereign, native-sync experience that works across all Outlook editions and platforms — Windows, Mac, iOS, Android, Web, Classic and New Outlook, cloud and on-prem in perfect harmony.

📣 Marketing: Design Autonomy Design in Word, save, done. Use familiar placeholders and logic to drive consistent branding without waiting for IT tickets. Test-drive using simulation mode.

🛠️ IT: Full Automation Centralized and decentralized architectures: Combine as required. Native synchronization for Exchange Online, Hybrid, and On-Premises. Supports commercial, national, and sovereign Microsoft 365 clouds.

🛡️ Security: Total Sovereignty Zero external data processing or mail rerouting. Runs within environments you already trust and govern. Open-source, peer-reviewable, and audit-ready core.

The power of the ecosystem

From dynamic branding to enterprise governance, our ecosystem delivers capabilities that conventional cloud relay solutions simply cannot match. Connect any data source, apply unlimited business logic, and synchronize natively across Outlook platforms without rerouting email or exposing data externally.

✨ Frictionless Adoption Invisible to end users, seamless background sync. Intuitive for Marketing and IT.	🧬 Dynamic Content Time-based campaigns, collapse empty lines, rule-based banners.	🔍 Simulation Mode Dry-run your deployment logic centrally or locally before going live.
🏝️ Out-Of-Office Replies Manage and distribute OOF messages consistently and centrally from one location.	📱 Signatures Everywhere Windows, Mac, iOS, Android, Web, Classic and New Outlook, cloud and on-prem in perfect harmony.	🏢 Enterprise Versatility Supports shared mailboxes, delegates, and custom logic.
🧩 Native Integration Direct-to-mailbox synchronization, no mail flow changes required.	🔒 Sovereign by Design No subscription, no auto-renewal, no external data transfer.	🚀 Marketing Impact Design in Word, test-drive from your desk, deploy brand-safe campaigns globally.

Security-conscious and brand-aware organizations worldwide trust our solution — for Microsoft 365 Commercial as well as national and sovereign cloud environments like GCC, GCC High, DoD, China, Bleu, and Delos.

See it in Action

Organizations use our ecosystem to enforce dynamic branding, administrative governance, and cross-platform data sovereignty — all without changing how users work.

Self-Service Quickstart Follow our 3-step process to deploy your first signatures in minutes. Peer-reviewable and production-ready.	Guided Walkthrough Schedule a session with our team to see how the solution adapts to your specific organizational structure, technical setup, and compliance requirements.
Ideal for IT Administrators and Evaluators. No Signup Required.	Ideal for Executives and Decision-Makers from Security, IT, and Marketing.

The Benefactor Circle license funds the open-source mission, ensuring the core engine remains free and peer-reviewable for the global community.