Assuming you have Coldfusion on both servers you could post it across with a server side http post.
In this case the file would travel directly from one server to another server.
Have a look at CFHTTP. The sending server would CFHTTP POST the file to the receiving server.
You can attach files using an http request.
You would post the file to a cfm on the receiving server which would retrieve the content and save it with cffile locally.
Let me know if you would like more detail on any of these steps - assuming this solution fits your requirements. Otherwise please be more specific about what you are trying to achieve.
Thanks
