Javamail recieved mail send back to sender as bounce mail

I am quite confuse handling a mail. Once i received mail in my inbox e.g. (gmail), can i able to send back to user as it is bounce mail. What i am d开发者_StackOverflow中文版oing in here is, my application read mail from gmail using Javamail API and i want to send back them as that their email has not been delivered.

Any one have face this kind of scenario?

Thank you

Bouncing a message is MTA's job, not a client's such as JavaMail. You can however fake a bounce message but anyone looking into the message's source will be able to tell it was sent from a client.