Fedora 8 + ISPConfig

I set up a server following step by step the directions of "Fedora 8 Server Setup" written by Falco
I setup the ICPConfig 2.2.26 also.
All the e-mail accounts I created with ISPConfig can receive e-mails but they cannot send because the server don't find the receipient's server.
All the users of the network that use the server I setup as DNS server don't have access to internet.
Could you please help me ?

 

Are there any errors in your logs, especially in the mail log?
What's in /etc/resolv.conf?

 

Dear Falco
In /etc/resolv.conf it's written

the name of the server is nestor.org.gr
and the mentioned ip's are the primary and secondary DNS I have gave for the server when I was installing fedora. I gave the same DNS for the domain www.nestor.org.gr in ISPConfig. The server's ip is 194.251.5.3

When I am using webmail (UebiMiau) I can recieve and send e-mails. The problem is only when I use outlook to send e-mail.

Thank you for your prompt reply
GrBase

 

Can you try

Code:

nameserver 145.253.2.75

as the first name server in your resolv.conf?

 

Dear Falko
I change the resolv.conf file and now it is like this

but I still cannot send e-mails with outlook.
The message error from outlook says
The message could not be sent because one of the recipients was rejected by the server. The rejected e-mail address was '[email protected]'. Subject '', Account: 'Secretary', Server: '195.251.5.3', Protocol: SMTP, Server Response: '554 5.7.1 <[email protected]>: Relay access denied', Port: 25, Secure(SSL): No, Server Error: 554, Error Number: 0x800CCC79

 

Did you enable "Server requires authentication" in your email client?