Changing a send connectors / virtual hosts port

There is currently no way to perform this within ECP - although you can add a smarthost easily enough - you are unable to specify a specific port during defining it. This must be performed with the Exchange Shell:

We will get a list of all send connects to identify the one in question:
Get-SendConnector

And then we can change the port number assosiated with it:
Set-SendConnector -Identity <connector-name> -Port 587

And finally to verify the changes:
Get-SendConnector -Identity <connector-name> | FL *Port*