Java EE (Java Enterprise Edition) General Discussion

I'm trying to send emails using javamail, it works fine but I would like to send emails with no sender address. When I don't set :

message.setFrom(new InternetAddress("test@test.com"));

or do just

message.setFrom()

I get my_user_name@my_machine_name as the sender address when i recieve the email.
I understand the security problems about sending emails without sender but i need to automate the sending of confirmation messages that recievers can't answer to.

Quentin.