290 votesRick Horvath commented
Just simply bring back a feature you had in the past - manual spam training. But make it for the entire server, not just for individual domains.This makes it easier to control server wide. If you don't recall the feature - it showed email address and subject line. There was a checkbox to mark it as spam for the filter to learn. No need for sensitivity filters - this concept is flawed at best.Rick Horvath commented
Sensitivity Filters are flawed at best!