I want to create a read only mailbox in my exchange server 2003. Actually, I like this user can just login to his mail box to check and receive his own mail, and the read only settings should include: cannot reply, forward, send mails.but I cannot do it, can anyone help? Thanks a lots.

This works for me- they can create an e-mail, but the delivery fails with a NDR (not elegant,but may be what you're looking for): AD Users and Computers, properties on the User, Exchange General tab, Delivery Options button, Recipient limits, Maximum recipients: 0 G