Googled just rolled out a new feature inside Gmail that tells you exactly why an email was automatically moved to your spam folder. The fun part is that Gmail offers multiple explanations for why something is spam, like "similar messages were used to steal people's personal information" (for a weight loss pill email), "our systems couldn't verify that this message was really sent by youtube.com" (for a phishing email), and "you clicked 'Report spam' for this message" (for a message you reported as spam a while ago). Gmail will even warn you if it thinks an email might contain a virus or malicious link. To try it out for yourself, head over to your spam box and click an email — you'll find Gmail's explanation just below the address field.
Gmail now tells you why it dumped that email in your spam folder
Google just rolled out a new feature in Gmail that lets you see why Gmail marked an email as spam.