It did work!!! finally i can read the messages sent by php with mail() command. However sending e mails is not possible. I have created just one mail account, and i tried to send an email to myself however i receive the following messagge from Mozilla Mail: "Sending of messagge failed, The message could not be sent because connecting to SMTP server linux.site failed. The server may be unavailable or is refusing SMTP connections. Please verify your SMTP server setting is correct and try again, or else contact your network administrator" Of course the server is totally available, i think probably is refusing SMTP connections. How can i figure this out?? What parameters should i change at postfix configuration files?? thanks for yuor help