exchange 2010 and exchange 2003

I am current running exchange 2010 and 2003.  I will be mirgrating from 03 soon.  I added a few people to the 2010 exchange server but if anyone(that is on exchange 2010) receives a 6 meg or bigger attachment from the 2003 exchange box it gets kicked back saying the attachments are too big. Any suggestions
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rescheteAsked:
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duraswitchCommented:
Open the EMS and run "Get-TransportConfig" and view the MaxReceiveSize & MaxSendSize.  You'll also want to run "get-sendconnector | fl" and "get-receiveConnector | fl" and check the same to properties.  The default for all of them is 10 MB.  

You can increase them by using the corresponding "set-" command.  For example, "set-transportconfig -MaxReceiveSize 20mb"
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