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How to change global message size limits in Exchange

TechRepublic member mbano recently asked a question about the size of attachments allowed to be associated with e-mail messages in Outlook 2003.  If you use Exchange on the server side, this quick tip outlines how to change global message size limits in both Exchange 2003 and Exchange 2007.

Global settings: Exchange 2003

In Exchange 2003's Exchange System Manager, go to Global Settings | Message Delivery.  Right-click Message Delivery and, from the shortcut menu, choose Properties.  From the Properties page, select the Default tab, as you can see in Figure A.

From this page, you can adjust the overall message size allowed to be sent or received through the Exchange server.  Note that all sizes are in KB.  You can also indicate the maximum number of recipients that can be included on a single message.  When you're done, click OK.

Figure A

From this page, you can adjust the overall message size allowed to be sent or received through the Exchange server.  Note that all sizes are in KB.  You can also indicate the maximum number of recipients that can be included on a single message.  When you're done, click OK.

Global settings: Exchange 2007

Exchange 2007 also has global message limits that are viewed and configured using Exchange 2007's command line-based Exchange Management Shell.  To view current settings, use the get-transportconfig command.  Figure B shows the result screen. Note that MaxReceiveSize and MaxSendSize are both set to unlimited in this example.

Figure B

The get-transportconfig command in action

To change the allowed global message size in Exchange 2007, use the set-transportconfig command.  The following command will set both the send and receive message size limit to 20MB:

Set-TransportConfig -MaxReceiveSize 20Mb -MaxSendSize 20Mb

About Scott Lowe

Since 1994, Scott Lowe has been providing technology solutions to a variety of organizations. After spending 10 years in multiple CIO roles, Scott is now an independent consultant, blogger, author, owner of The 1610 Group, and a Senior IT Executive w...

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