Hi Guys. I did an Install on Cent OS 4 and all has gone very well. Every thing seams to be working fine. I have created a reseller/client and one site. All Access is good everything is working as it should, however there's just one bit I'm not too sure on. I ran an external open relay test which passed ok (it denyed sending any mail) I setup an account in Outlook 2003. Under Accounts -> more setting-> outgoing server I clicked outgoing server requires auth + log into incoming mail before sending. I can get mail ok, but when I try to send I found the following error in the log, however the mail still got sent. Dec 22 23:08:22 webserver postfix/smtpd: NOQUEUE: reject: RCPT from unknown[192.168.1.120]: 554 <[email protected][email protected] however It arrived into my hotmail account shortly afterwards, what have I got setup wrong. Thanks for any help. Keith.