Hello, This morning I received this NDR: Name@recipientdomain.com # <# 5.6.1 smtp; 554 5.6.1 Body type not supported by Remote Host> # SMTP # So I did some research but I do not understand what I need to do. Here is my architecture, I'm in the final phase of a migration from Exchange 2003 to 2007 . I did the following command on my Exchange 2007 get-SendConnector Name | fl, I saw that ForceHELO is false, on several websites I read that this setting must be true. What does this setting impact to true or false? Thank you for your help DS

So you're getting this NDR on mail sent from your server or to your server? I suggest that this is likely not caused by Exchange but by a firewall that's "helping" you secure SMTP or by another server. Please provide a description of the message flow and what devices are in the path.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

I received this NDR when we tried to send an email from my server (exch2007.mydomain.com, exch2003.mydomain.com) to their server (recipient address cmartin@beveragedistr.com). This is the full NDR Generated Server : bdc-exch01.BDCO.CSG-IT.NET CMartin@sunbeltholding.microsoftonline.com #< #5.6.1 smtp;554 5.6.1 Body type not supported by Remote Host> #SMTP# En-têtes de message d'origine : Received: from BDC-SPAM.beveragedistr.com ([10.26.2.31]) by bdc-exch01.BDCO.CSG-IT.NET with Microsoft SMTPSVC(6.0.3790.4675); Sun, 31 Oct 2010 20:39:38 -0600 X-ASG-Debug-ID: 1288579177-624e75510001-kyQpP1 Received: from exch2007.mydomain.com (exch2007.mydomain.com [IP_EXCH2007]) by BDC-SPAM.beveragedistr.com with ESMTP id SLXtUUaNhLkQlyVu for <cmartin@beveragedistr.com>; Sun, 31 Oct 2010 20:39:37 -0600 (MDT) X-Barracuda-Envelope-From: myuser@mydomain.com X-Barracuda-Apparent-Source-IP: IP_EXCH2007 Received: from exch2003.mydomain.com (192.168.127.30) by exch2007.mydomain.com (192.168.127.37) with Microsoft SMTP Server id 8.3.106.1; Sun, 31 Oct 2010 22:39:29 -0400 Received: from www.mydomain.com ([192.168.127.21]) by exch2003.mydomain.com with Microsoft SMTPSVC(6.0.3790.4675); Sun, 31 Oct 2010 22:39:29 -0400 Date: Sun, 31 Oct 2010 22:39:29 -0400 To: <cmartin@beveragedistr.com> From: Tech Support Self Help <myuser@mydomain.com> Subject: Thank you for registering at Tech Support Self Help Message-ID: <ee56d7cd32f99017bf575ed69ba7eddf@www.mydomain.com> X-ASG-Orig-Subj: Thank you for registering at Tech Support Self Help X-Priority: 3 X-Mailer: PHPMailer (phpmailer.sourceforge.net) [version 2.0.2] MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="b1_ee56d7cd32f99017bf575ed69ba7eddf" X-OriginalArrivalTime: 01 Nov 2010 02:39:29.0581 (UTC) FILETIME=[01EC2DD0:01CB796E] X-Barracuda-Connect: exch2007.mydomain.com[IP_EXCH2007] X-Barracuda-Start-Time: 1288579177 X-Barracuda-URL: http://10.26.2.31:8000/cgi-mod/mark.cgi X-Virus-Scanned: by bsmtpd at beveragedistr.com X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using global scores of TAG_LEVEL=3.5 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=5.0 tests=HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.45324 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message Return-Path: myuser@mydomain.com Thanks

If this is the only domain bouncing your e-mail, then I propose that the problem is theirs. It looks like their mail is being hosted by Microsoft Online, as indicated by the address CMartin@sunbeltholding.microsoftonline.com. You might want to call Microsoft Online and see if they can tell you why they bounced your message.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

Hi, Is this maybe a fake NDR? The postmaster of this NDR is postmaster@CSG-IT.NET, the email of the guy is CMartin@sunbeltholding.microsoftonline.com and cmartin@beveragedistr.com, I'm lost ;-) I received the NDR after this guy registered to our forum. DS

Actually, that combination of addresses is perfectly reasonable. In Microsoft Online, everyone gets an address of companyname.microsoftonline.com, and then comapnyname.com gets added when the customer validates the domain. (I've done several Microsoft Online migrations!) It certainly could be an NDR caused by spam with your domain's address being spoofed. If the sender didn't send anything to that address, then I'd just forget about it. Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."