The default email attachment size limit in Exchange 2007 and Exchange 2003 is 10 MB. Here is how to change that setting for both systems.
First, Exchange 2007. Use the Exchange Management Shell to enter the following commands:
Get-TransportConfig | ft MaxSendSize, MaxRecieveSize
- Output will show current transport send receive attachment size limits. This is the most restrictive setting and overrides all other less restrictive size limits set elsewhere (i.e. individual mailboxes / receive-connector)
Set-TransportConfig -MaxSendSize 100MB -MaxReceiveSize 100MB
- Note: commands are not case sensitive and are capitalized for readability. This will set send and receive size limit to 100MB per email.
Get-ReceiveConnector | ft Name, MaxMessageSize
- Make note of “Windows SBS Internet Receive SERVERNAME” and “Default SERVERNAME” for set-receiveconnector command
Set-ReceiveConnector “Windows SBS Internet Receive SERVERNAME” -MaxMessageSize 100MB
Set-ReceiveConnector “Default SERVERNAME” -MaxMessageSize 100MB
- Note: If the TransportConfig size is more restrictive, it will override this setting. Also, “Windows SBS Internet Receive SERVERNAME” may be case sensitive as it is in quotes.
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