the.com/gmail spam filter
a machine that reads all your mail so you don't have to read the bad parts.
means google's automated system that scans incoming email and quarantines anything it judges to be junk, scams, or bulk mail before you ever see it.
from launched with gmail in 2004, built on early bayesian filtering techniques but rapidly evolved into a machine-learning system trained on the spam patterns of over a billion inboxes.
accuracy claimblocks over 99.9 percent of spam and phishing
training datalearns from collective reports across all gmail users
false positive fearlegit emails sometimes vanish with zero warning
signals usedchecks sender history, links, formatting, even send time
for instance
nigerian prince scam — classic 2000s spam archetype, now almost extinct thanks to filtering
promotions tab — a softer cousin, sorting marketing mail since 2013
phishing alerts — gmail flags suspicious login-request emails in red banners