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In this video, I delved deep into the complexities of the email classification service at Slack, revealing how seemingly simple features can present unexpected challenges in implementation. I highlighted the importance of classifying emails as internal or external for smooth onboarding processes, emphasizing the need for an email classification service. I discussed the use of heuristics and the implementation of an email domain tracking system to classify emails effectively. Additionally, I explained the significance of using upsert statements for data consistency and addressed challenges related to message duplication in event processing.
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