anyone implemented postfix and exchange solution where external mail comes into postfix is passed to exchange.
sending mail, leaves exchange via a send connector, goes to exchange and heads off to the interwebs.
I've managed to get postfix working so external mail comes in and goes to exchange.
But when i send mail from exchange it doesn't work and i get the following error
Your message wasn't delivered because of security policies. Microsoft Exchange will not try to redeliver this message for you. Please provide the following diagnostic text to your system administrator.
The following organization rejected your message: 192.168.1.239.
Diagnostic information for administrators:
Generating server: **
192.168.1.239 #<192.168.1.239 #5.7.1 smtp; 550 5.7.1 Unable to relay> #SMTP#
Original message headers:
Received: from localhost (emerald [127.0.0.1]) by domain.com
(Postfix) with ESMTP id 10ADB17776E for <firstname.lastname@example.org>; Thu, 8 Oct
2009 14:08:24 +0100 (BST)
X-Virus-Scanned: amavisd-new at domain.com
Received: from domain.com ([127.0.0.1])
by localhost (mail.domain.com [127.0.0.1]) (amavisd-new, port 10024)
with LMTP id CWewW+To43VB for <email@example.com>;
Thu, 8 Oct 2009 14:08:21 +0100 (BST)
Received: from exchange.** (exchange.** [192.168.1.239])
by domain.com (Postfix) with ESMTP id 159A517776A
for <>; Thu, 8 Oct 2009 14:08:21 +0100 (BST)
Received: from EXCHANGECLUSTER.** ([192.168.0.13]) by
exchange.** ([192.168.1.239]) with mapi; Thu, 8 Oct
2009 13:53:49 +0100
if anyone is able to help, it would be greatly appreciated