how to find correct email and undeliverable email in javamail

[kiran manohar]

hi,
i have used in my project javamail to track new messages in my inbox and store them in a table.now i want to know how to differentiate between correct email and email messages which are undelivered. for example if i sent a mail to an address and if that address is not available then when i retrieve all the messages from my inbox i need to store the message which are right in one table and those which have not been delivered to another table.does anyone know a way of tracking this.
Regards
Kiranmanohar