Igorinuk -- two good questions that have been previously discussed.
1) Read and vote for this thread:
http://portal.smartertools.com/community/a362/allow-reporting-of-spam-via-imap.aspx
2) See my suggestion to run Bayes & Cyren on primary mail server and add to the gateway score:
http://portal.smartertools.com/community/a87006/when-using-gateway-spam-checks-are-repeated.aspx