Email size limits (Exchange 2007)
From ben.goodacre.name/tech
The maximum size of an email that can be sent or received can be set either a Global, Connector, Server or indeed the individual user's level. For most purposes it is best to set the limits at the Global level to avoid confusion. The default global limit is 20Mb.
[edit] Get/Set Global message limit
EMS:
Get-TransportConfig
Look for the MaxReceiveSize and the MaxSendSize.
To set the global send and receive limits to 15Mb:
Set-TransportConfig –maxsendsize "15Mb" Set-TransportConfig –maxreceivesize "15Mb"

