RT IncomingEmail Action

Hi

I was looking at RT2 IncomingEmail ScripCondition:

http://www.fsck.com/pub/rt/contrib/2.0/IncomingEmail/

This is a ScripCondition to fire if the transaction is originated via
Email.

How can I patch RT (RT2 or RT3), if I don’t want RT to sent mail out
of RT, if the transaction is originated via Email ?

Best regards,
David