Event Notification Fallback: Design Choices for Email-to-SMS Polling Explained

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A property management signup flow can use a scheduled worker as a state machine to handle a verification link, polling email status before escalating to SMS if the outcome remains uncertain. The design is not instantaneous and relies on approximate fallback timing without webhooks. Implementation choices depend on team priorities, such as operational simplicity or integration with existing cloud platforms. Each option, including unified APIs or separate vendor services, involves trade-offs in credentials, billing, and state management, but none can guarantee real-time delivery confirmation.

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