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Donovan also mentioned USPS validation processing - so that we can filter out addresses that the USPS knows are not deliverable.
His words:
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I liked our discussion of having a validation date for the USPS deliverability –
one thought I had is that it could be real-time validation if the validation date was stale (older than 6 months).
Validation would then be stored in the db upon use -
this would solve the problem of stale metadata but also save on USPS validation costs.
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