That gets asked frequently https://hn.algolia.com/?dateRange=pastYear&query=ask+gmail+spam https://hn.algolia.com/?dateRange=pastYear&query=ask+gmail+s... Best

That gets asked frequently https://hn.algolia.com/?dateRange=pastYear&query=ask+gmail+spam https://hn.algolia.com/?dateRange=pastYear&query=ask+gmail+s... Best theory I've read is that sometimes Gmail needs to let some unclassified spam through and have users report it to get feedback on an algorithm change.