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Transactional email evidence gaps can hide behind accepted API requests

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A DEV Community article argues that marketplaces should choose transactional email services based on the evidence they can retain after a payment settles. It says an accepted API submission is only a checkpoint and does not prove a buyer received a receipt. The author recommends tracking which settled orders lack receipt evidence, how old those gaps are, and where in the workflow progress stopped. The piece suggests separating missing submission evidence from missing delivery evidence, since each requires different owners and access. Its alert thresholds are presented as illustrative starting points rather than vendor performance guarantees.

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