1 - PHP mail function doesn't function under Windows. To solve the problem,
use a recent version of php. The envoi_message.php file was written on the basis
that you have a recent php.
2 - When a mail with more than 900 KB of attached file(s) is sent,
the copy is not done in Sent items, under Windows.
You have found a bug ?
Do you have think of going to see in the FAQ ? Much of is saying bugs
are simply errors of appreciation, problems of configuration, specific problems
involved in an application.