Procmail

To use Pyzor in a procmail system, consider using the following simple recipe:

:0 Wc
| pyzor check
:0 a
pyzor-caught

If you prefer, you can merely add a header to message marked with Pyzor, instead of immediately filtering them into a separate folder:

:0 Wc
| pyzor check
:0 Waf
| formail -A 'X-Pyzor: spam'