JavaMail

I am using javamail to send mail, and I have it working fine. I want to set a flag/attribite to trigger the "Request a Delivery Receipt for this message" and the "Request a Read receipt for this message". I have had a look at the api for a number of classes (Message, MimeMessage, Tr5ansport) but I do not see anything that looks like this. Any pointers?

is this of any help?

Looks just about right.............thanks