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I thought mail forwarding was done at the initial address scan, not the final address scan. I did a bunch of research on this a few months ago, but unfortunate

I thought mail forwarding was done at the initial address scan, not the final address scan. I did a bunch of research on this a few months ago, but unfortunately I can't find a source right now.

mindslight 15y ago
That would make the most sense, but I've observed contradictory behavior with MA->CA->MA mail taking ~10 days. Also, the CA post office not respecting the "end forward" date, and mail getting sent back and forth a few times. I suppose I could have been seeing corner cases due to some unknown facet, but to me they indicate an antiquated system.