One way to test this is to write a test script, and call that.
You can do that with acs-automated-testing, or just write a tcl script that calls the procedures you need.
In your case you need to
1) Make sure the email ends up in the correct Maildir
2) Make sure acs-mail-lite reads the maildir and finds the email
3) amke sure acs-mail-lite decodes the email prefix and calls the bugtracker incoming email handler.
You should be able to do all that by putting ns_logs in the procedures that handle the mail.
NOTE: if you change a tcl procedure called by a scheduled procedure you need to restart aolserver for it to be reloaded. Using the APM reload feature will not work.
