yes, you can do that.
i signed up in the 90s for yahoo brazil account. then ichanged the settings to be in italy - still conserving the mail address as usernamewhatever.. @yahoo.com.br - i could with yahoo italy use the popmaila (load yahoo mail from mail apps) untill last year. or maybe untill being in US? it worked fine in uk, everywhere else in europe. hm. :-/
yahoo is not the only alternative. altern.org gives you 15 or 20 mb space, and you can use it with mail apps or in its minimal webmail. also email.it gives 15 mb space, it adds an advertising line in the end of the mails, but that works when you are in US too. altern adds nothing.