Sending Hotmail from South Korea – would it take a particular route?

We have a legal case, where we are trying to prove an email sent and the email account it was set up from, was setup and used for fraudulent purposes.

The email account is a Hotmail.co.uk email account, however the owner of the account is supposed to reside in South Korea and therefore any emails sent from it, should have originated from a web browser in South Korea.

In practice, we highly suspect they were actually sent from a web browser in the UK, The problem with webmail, is the headers show the email originates from servers in the US. This is understandable as Hotmail is a US service.

My questions:

1)      Is there any chance that emails sent from Hotmail, but based in South Korea are always routed in a certain way. For example, if emails from a web browser in South Korea are always stamped and routed through some particular route, then the absence of this, may be evidence it was not sent from South Korea.

2)      Do we think that Microsoft would retain information such as, what country the browser used was in? Therefore in the case of a court order we could obtain this information?

3)      Anything else anyone can think of that might help us in this case?