Exchange 2007 and attachment sizes

SteelValley used Ask the Experts™
Hi, I have an Exchange Server 2007 running on SBS 2008.

We have an issue where our attachments exceed the default 10MB Exchange file limit.  I've gone into Exchange>Hub Transport > Transport Settings and adjusted them to 40MB.  I've restarted the Exchange services and SMTP services.  Still I am unable to send above 10MB.

I've looked into this and people mentioned a Global setting, but that was for Exchange 2003 and upgrade installs of 2007.  

Where else should I look for this setting?

Here's a dump from a failure message.

Delivery has failed to these recipients or distribution lists:
This message exceeds the maximum message size allowed. Microsoft Exchange will not try to redeliver this message for you. Please make the message smaller -- by removing attachments, for example -- and try sending it again, or provide the following diagnostic text to your system administrator.


Sent by Microsoft Exchange Server 2007

Diagnostic information for administrators:

Generating server: LERFS.lernet.local
#550 5.3.4 ROUTING.SizeLimit; message size exceeds fixed maximum size for route ##

Original message headers:

Received: from LERFS.lernet.local ([fe80::51a2:bbb8:fd00:79c9]) by
 LERFS.lernet.local ([fe80::51a2:bbb8:fd00:79c9%10]) with mapi; Wed, 6 Apr
 2011 00:06:20 -0400
Content-Type: application/ms-tnef; name="winmail.dat"
Content-Transfer-Encoding: binary
From: xxxxxxx <>
To: "" <>
Date: Wed, 6 Apr 2011 00:06:12 -0400
Subject: test of attachment size limits
Thread-Topic: test of attachment size limits
Thread-Index: Acv0D+bOOZXCEqnJQVG+W7lK5SyElQ==
Message-ID: <641CF6EDBDEFE14EA8BE47532214CD8F29A84979DD@LERFS.lernet.local>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach: yes
X-MS-TNEF-Correlator: <641CF6EDBDEFE14EA8BE47532214CD8F29A84979DD@LERFS.lernet.local>
MIME-Version: 1.0
X-TM-AS-Product-Ver: SMEX-
X-TM-AS-Result: No--43.146500-5.000000-31
X-TM-AS-User-Approved-Sender: No
X-TM-AS-User-Blocked-Sender: No
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you need to check some places:

for receiving and sending as well:
Organization Configuration->Hub Transport->Global Settings->Properties of Transport Settings
then you can set your transport send/receive limit

Receive Connector:
Server Configuration->Hub Transport->Receive Connectors Pane->Properties of Default <hostname>
then you can set your receive connectors default maximum message size

Send Connector
Organization Configuration->Hub Transport->Send Connectors->Properties of Default Send
then you can set your send connectors default maximum message size

also check the database limits and user mailbox limits, if you have configured before

for more information please check the below URL:


We can now send larger attachments using the steps above, but receiving mail with large attachments is still causing issues.  Get a rejected message saying attachment size exceeds limits.

Did u check your receive connectors

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