`bounce_score`: `<integer> (0 - 1000)` ('default =' `0`)::

Additional score for bounce mails.

`clamav_heuristic_score`: `<integer> (0 - 1000)` ('default =' `3`)::

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`)::

This option is used to specify which languages are considered OK for incoming mail.

`maxspamsize`: `<integer> (64 - N)` ('default =' `262144`)::

Maximum size of spam messages in bytes.

`rbl_checks`: `<boolean>` ('default =' `1`)::

Enable real time blacklists (RBL) checks.

`use_awl`: `<boolean>` ('default =' `0`)::

Use the Auto-Whitelist plugin.

`use_bayes`: `<boolean>` ('default =' `0`)::

Whether to use the naive-Bayesian-style classifier.

`use_razor`: `<boolean>` ('default =' `1`)::

Whether to use Razor2, if it is available.

`wl_bounce_relays`: `<string>` ::

Whitelist legitimate bounce relays.