For some reason, gmail classifies nearly all of the transactional email I get from Amazon (order acknowledgements, shipping notifications, etc) as spam, and no matter how many I catch and un-mark, it won't stop.
Spam classification is a hard problem, but I don't think they've put the false-positive/false-negative tradeoff in the right place, and they really need some safety valves like offering to whitelist an address when you un-mark it as spam.
Spam classification is a hard problem, but I don't think they've put the false-positive/false-negative tradeoff in the right place, and they really need some safety valves like offering to whitelist an address when you un-mark it as spam.