Winan
Every 'user' on a linux machine has by default an email address. their email address is usually configured to be username@myredhatbox.net (or whatever the DNS records say is the internet name of that machine.

you can go to the /etc/passwd file and view the file, for a listing of all the users on that machine(thereby getting a email list) if its set up that way.

Or, you would need to configure a LDAP service / server to be running on your Redhat, that way outlook express could point to that ldap service and view the names on your ldap database.

Hope this starts you in the right direction.
Bob Lee

>I use Sendmail for email service in my RedHat 7.2 and I use Outlook express to send and receive mail, and I have a question that I hope any one here can answer it.. the question is: is it possible for me to retrieve all email addresses that located in my RedHat server and then show them in my outlook express? .. if "Yes" .. could any body explain to me in detail please?
>any idea and or suggestion is highly appreciated and thanks a lot in advance.. Have a nice day
>
>Regards
>
>Winan