header __TOCC_EXISTS exists:ToCc
-header X_PRIORITY_CC ALL =~ /^X-Priority:[^\n]{0,80}^Cc:/msi
+header X_PRIORITY_CC ALL =~ /^X-Priority:.*?^Cc:/msi
describe X_PRIORITY_CC Cc: after X-Priority: (bulk email fingerprint)
# catch non-RFC2047 compliant messages