How to use trigger to send mail via built-in AIX mailer?

Could someone please post or send me offline (scot.balfour_at_lmco.com) a PL/SQL fragment that creates a trigger that can:

1. build a simple message body like: Order #5 was deleted by user: XYZ
2. send this message with a subject to multiple users via AIX sendmail

For now, the fragment could just have hard-coded e-mail addressees; they could be read from a table down the road if the concept works.

Also, what code is added so the trigger can read/include a flat file from the operating system, in the note body, for example? Thanks.

-- 
Scot Balfour
COTS Integration and Support