`clamav_heuristic_score`: `<integer> (0 - 1000)` ('default =' `3`)::
-Score for ClamaAV heuristics (Google Safe Browsing database, PhishingScanURLs, ...).
+Score for ClamAV heuristics (Encrypted Archives/Documents, PhishingScanURLs, ...).
+
+`extract_text`: `<boolean>` ('default =' `0`)::
+
+Extract text from attachments (doc, pdf, rtf, images) and scan for spam.
`languages`: `(all|([a-z][a-z])+( ([a-z][a-z])+)*)` ('default =' `all`)::