Hi! Is there anybody having experience using exchange and postfix? Due to chost reason I want to use postfix as external MTA. In our DMZ we have an Exchange-Server with OWA. Our users want to have Webaccess for External use. If there comes the question why I don't use imp/horde or something like that - I gave it a try but it wasn't accepted. My config is, that postfix gets mail and redirects it to amavis and then transmitts virus free mails to the exchange-server via the .forward. This way is secure and is scanned. The users then may send mails to external servers with the exchange-server and the recipient may return mail to this account. Is it possible to rewrite headers of the exchange-server's outgoing mails, that all mails are from the linux-server? Or is there any other way? This would minimize my problem. Philippe