The Hellenic Post (ELTA) is the national mail carrier of Greece:
However, there are a number of private courier services, both local and international, which deliver countrywide.
Update 31/12/2008
When you move internationally you are taking a big step. Lots of things are changing and you have a million things to think about and take care of. If you are able to select a top of the line moving company that moves for a modest price, it can take a big weight of your shoulders in busy times.
Our network of international removal companies can move your furniture & possessions to Greece and anywhere overseas.
Filling in the form will allow you to request up to 5 quotes from various moving companies. This service is free of charge and will help you select an international moving company that suits your needs and budget.