Consulting
Messaging consulting built on practice
I am Rafael Pfister, an independent messaging specialist based in Switzerland and founder of Adeptio GmbH. For more than 14 years I have been building, running and repairing email infrastructure: Exchange Online and Hybrid, encryption gateways, HIN in Swiss healthcare, mail routing and authentication. The articles and tools on this website are real-world examples of how I approach problems. You can hire me per project or as a freelancer part-time.
Services
- Microsoft 365 & Exchange Exchange Online and Hybrid: architecture, operations, hardening and mail routing.
- Secure email & gateways HIN, SEPPmail and encryption gateways in regulated environments.
- Mail flow troubleshooting Systematically resolving delivery issues, NDRs, mail loops and misclassifications.
- SPF, DKIM & DMARC Introducing and repairing email authentication until p=reject is within reach.
- Load testing & sizing Deriving load profiles, simulating bursts, sizing gateways and relays on solid numbers.
- Exchange Online migration Moving mailboxes and mail routing to the cloud in a controlled way, edge cases included.
- Messaging freelancer Per project or part-time: Exchange and gateway expertise embedded in your team.
How I work
- Direct, no intermediaries. You talk to the person who analyses, implements and documents.
- Project-based. Clearly scoped engagements with a defined outcome, from a half-day review to full migration support.
- Transparent. I state terms and availability in the first conversation, not the third.
- Traceable. Every engagement ends with documentation your operations team can maintain; changes are planned so they can be rolled back.
- Remote or on site. German-speaking Switzerland, in German or English.
