Clean your pc from Trojans
http://www.geocities.com/amixsoundrnb/cleaners.htm for some trojans and viruses

Test your anti-trojan defenses with trojan attacks
http://www.am20forces.cjb.net/ trojans to download

Look if you have any trojan traffic on your network or pc

http://www.glocksoft.com/trojan_port.htm trojan port list
http://www.silentnight2004.com/trojanports.htm trojan port list There are the ports that trojans use most of time, but you have to be careful by just going to block those outright, some of them are also used by specific programmers and normal programs. Someone should tell those programmers to stay away from these ports, but at the other side trojans - as other malware - are moving to the normal porst (such as dns, http) because they can never be closed.
specific trojan email attacks http://www.us-cert.gov/cas/techalerts/TA05-189A.html