ISPC can't do header checks or body checky (yet). However you could set that up manually (or I have created a little form to amend domains to header_checks):
http://www.postfix.org/header_checks.5.html
Code:
/^Subject:.*=\?(big5|euc-kr|ks_c_5601-1987|koi8)\?/ REJECT Spam not tolerated here - hc 1
/^Subject: offizielle sieger/ REJECT Spam not tolerated here - hc 2
/^Content-Type:.*charset="?(GB2312|big5|euc-kr|ks_c_5601-1987|koi8|iso-2022-jp)/ REJECT Spam not tolerated here - hc 3
/^Subject: Sie haben gewonnen/ REJECT Spam not tolerated here - hc 4
/@usa\.com/ REJECT Spam not tolerated here - hc 1000
/@mail\.disatel\.com/ REJECT Spam not tolerated here - hc 1001
/@cantv\.net/ REJECT Spam not tolerated here - hc 1002
/@infotrading\.it/ REJECT Spam not tolerated here - hc 1003
/@rafamt\.org/ REJECT Spam not tolerated here - hc 1004
I also added some info: hc 1000 --> header_checks entry 1000 --> that makes it easier to find out by which rule an email was rejected.