Exchange 2003 - incoming mail

[iownitcouk]

Ive had an exchange 2003 server set up for a while now but only ever used it myself so never noticed any problems. I have now decided to add other users

they are all set in AD with their SMTP email addresses but all incoming mail regardless of what email address comes to my mailbox and wont go to theirs...I must have missed something really stupid here...been at it for hours to no avail..