for checking use:
get-transportconfig | ft maxsendsize, maxreceivesize
get-receiveconnector | ft name, maxmessagesize
get-sendconnector | ft name, maxmessagesize
for setting use:
Set-ReceiveConnector “Windows SBS Internet Receive Servername” –MaxMessageSize 29MB
or for all connectors:
get-receiveconnector | Set-ReceiveConnector -MaxMessageSize 30MB
Set-SendConnector “Windows SBS Internet Receive Servername” –MaxMessageSize 29MB
get-transportconfig | Set-TransportConfig -MaxReceiveSize 30MB -MaxSendSize 30MB
http://www.nogeekleftbehind.com/2011/12/09/show-exchange-message-size-limits-in-sbs-20082011/
