Lessons from Mail-Based EDI Processing
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Part 3 of 3 — EDI Mail-In Series
Back to Part 2 — Modular Processing
Designing a solution is one thing. Operating it in real environments is another.
Lesson 1: not all emails behave alike
Internal emails are often simple.
External emails can arrive as complex multipart structures.
Lesson 2: JMS prefers simple payloads
Stable formats include:
- String
- byte[]
Complex payloads can cause errors such as conversion or parsing issues.
The solution is to normalize payloads before JMS handover.
Lesson 3: archive timing matters
Early archive handling introduced unnecessary complexity.
Moving archive processing to a later stage improved robustness and stability.
Lesson 4: external dependencies
Microsoft Graph API is used for mailbox operations.
It is a valid dependency that should be documented, but it does not require overengineering unless failures become frequent.
Lesson 5: testing limitations
Using a single shared mailbox limits full end-to-end testing scenarios.
Testing therefore focuses more on the integration layer than on complete mailbox simulation.
Lesson 6: duplicate handling
Duplicate detection was intentionally not implemented.
From a business perspective, messages may need to be resent or reprocessed, and strict duplicate prevention could block valid operations.
Conclusion
Robust integration is not about perfection.
It is about understanding real-world behavior and adapting the architecture accordingly.
Strong solutions evolve over time based on real runtime insights.
End of Series