>But Word client should use some type of encoding right?

I don't know what it uses but there are a lot of weird things in that one. For example, it eats BASE HREF and stylesheet. In Outlook, those appears as is. When I send the encoding, I see that it resolves issue with the subjects but causes some really bad conversion on the next email. So, one causes problems on the other. This is really an issue that I do not know how to resolve. This interface is really primitive and I will just send the email as is for now until a new version is released.