Email width differs if language changes

[orange_juice]

Thank you very much for your answer.

When I go to Admin -> Customers -> Email and write in english, the email received appears with normal width.

If I write in Greek, the email received appears with half the width.

Here is an example:

-----------------------------------------------------------------------
σδφποξσδ φποσκδφ ποσκδφ ποςερ ποσδφ
ποσξεδφ ποσκδφ [0ι;ς [οσδφπ οαξκσδ
ολξσδφοπ ιξσδω ιηζδχψι υγβσαδφ ιθηβδωψ
κβξασδφ κθξζσδφ κθξνσαδφιθ ξκνσδφθκξ
νσδφ
This email address was given to us by you or by one of our customers. If you
feel that you have received this email in error, please send an email to
***********removed******
This e-mail is sent in accordance with the US CAN-SPAM Law in effect
01/01/2004. Removal requests can be sent to this address and will be honored
and respected.
---------------------------------------------------------------------------------------

I assume that this raw text email has nothing to do with the language settings, but I am completely unaware of the parameters that define it. Is there a text-email css file?

My shop successfully uses UTF8 characters.

This happens either with Configuration -> Email Options -> E-mail transport method= PHP or SMTPAUTH

Where do you think I should start looking?

Kind regards,
orange_juice