Set up a bank account :
Greece
Set up a bank account
Opening a bank account in Greece is not difficult. Hopefully, these sites should give you the information you need. Remember, like with most things, research is the key.
Expat Focus - Banking
Helleniccomserve - Banking
Be aware that without the Greek authorities permission, it is illegal to send cash or cheques by post from greece to another country. If you need to take money back out of Greece, ensure you know the law!