Contact form - windows - iso encoding greek format

Hi. As we solved the problem of the actual sent of the contact form of the Alium theme and now it works, we stambled across a new problem concerning the encoding and the view in Greek format of the mails that are sent.
We replaced the values
Last name
name
Address
Telephone
email
Subject
text

with the greek values\


Επώνυμο
Όνομα
Διεύθυνση
Κινητό τηλέφωνο
email
Θέμα
Κείμενο

we receive the text below:
inside the () I ve input the values that are normally shown in English
Before the parenthesis () the values are in Greek because this is the results from english input of characters

The following example is what we receive when we input greek characters

Ξ•Ο€ΟŽΞ½Ο…ΞΌΞΏ: aaaΞ±Ξ±Ξ±AAAΑΑΑ
Όνομα: BBBΞ’Ξ’Ξ’
ΔιΡύθυνσΕ: Ξ™Ξ“Ξ›Ξ™Ξ˜Ξ“Ξ™Ξ˜Ξ“;G;UGIGUGL
ΞšΞΉΞ½Ξ•Ο„ΟŒ τΕλέφωνο: 6993045000
Email: papanikolopoulos@mycosmos.gr
Θέμα: TEST ΞΕΣΞ
ΜΞΞ½Ο…ΞΌΞ±: Ξ±Ξ²Ξ³ abg test

Please help... Anyone???