Dear friend, Recently we have upgraded an old MsExchange machine to FC4 and Postfix 2.2.2 .We have no problem with our webmail,squirrel mail and it pop service works fine when we want to retrieve messages from the server but when we want to send email to outside world,like lycos mail boxes,we got Relat access denied. I have studied documents and it seems to me that the reason refers to the default amount of $relay_domains which is equal to $mydestination. Do you have any idea to solve this probem and enable our users to send their emails via outlook AND keep out server protected against SPAMMERS. Thank you, __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com