No one here knows anything about your email service or how you access your personal files when you're away from home, so it's all guesswork for us, unless you have more information to share.
Here's my guess: Since whatever problems you are having apparently happen when you are overseas, it may be that the software you are using is setup not to accept requests from overseas. That would likely be a security feature, to stop attackers from other countries from accessing your personal data.