Exchange 2013 Sender Callout FIX

For those having issues with Sender callout, the easiest thing to do (if you are protected behind a spam filter like I am) is to move the receive connector to the HubTransport role from the FrontendTransport role. $ReceiveConnector = “Default Frontend $env:computername” Set-ReceiveConnector -TransportRole HubTransport -Identity $ReceiveConnector