Set the Protocol logging level on the receive connector to "Verbose", and check your smtp protocol logs for the message rejection.
From: Damien Solodow [mailto:damien.solo...@harrison.edu] Sent: Tuesday, September 20, 2011 12:25 PM To: MS-Exchange Admin Issues Subject: NDR tracking? Ok, I'm having an issue with an externally originating message bouncing and I'm apparently having a brain fart. Hopefully someone can help me clear the air. Use from Gmail is sending a message to one of our recipients; total attachment size is about 9.8 MB. Our SMTP gateway (Brightmail) allows attachments of up to 10240 KB, and is accepting the message from Gmail. However, when it goes to hand it off to our Exchange 2010 SP1 HT server, it gets a 5.3.4 Too large. I checked the receive connector as well as the Org level settings for Transport, and it is set to allow messages of up to 10240 KB. I found a KB article for Brightmail gateway saying that due to format conversion, etc, the message passed through to the downstream server can be up to 30% larger. So, I updated the receive connector and the Org level settings to 13312 KB (10240 * 1.3). However, the message is still bouncing. What's even more frustrating is that the Message Tracking and Tracking Log Explorer don't have any record of the message. On both Hub Transports I increased the Diagnostic Logging for MSExchangeTransport\DSN and MSExchangeTransport\SmtpReceive to High but nothing in the logs. What log(s) do I need to increase to find out how big the message is when the HT tries to accept it so I can see how large it needs to accept? Help me Obi-Wan... DAMIEN SOLODOW Systems Engineer 317.447.6033 (office) 317.447.6014 (fax) HARRISON COLLEGE 500 North Meridian St Suite 500 Indianapolis, IN 46204-1213 www.harrison.edu<http://www.harrison.edu/> --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com<mailto:listmana...@lyris.sunbeltsoftware.com> with the body: unsubscribe exchangelist ************************************************************************************************** Note: The information contained in this message may be privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer. ************************************************************************************************** --- To manage subscriptions click here: http://lyris.sunbelt-software.com/read/my_forums/ or send an email to listmana...@lyris.sunbeltsoftware.com with the body: unsubscribe exchangelist
