Mailu/core/rspamd/conf/classifier-bayes.conf

autolearn {
  spam_threshold = 6.0; # When to learn spam (score >= threshold)
  ham_threshold = -0.5; # When to learn ham (score <= threshold)
  check_balance = true; # Check spam and ham balance
  min_balance = 0.9; # Keep diff for spam/ham learns for at least this value
}