MailMessage.Subject Finnish encoding

Question

I'm trying to send a Finnish email with "Käyttörajan muutos" in subject.

Tried different encodings:

message.Subject = "=?iso-8859-1?B?" + Convert.ToBase64String(Encoding.GetEncoding(1252).GetBytes(strSubject)) + "?=";

and

message.Subject = "=?utf-8?B?" + Convert.ToBase64String(Encoding.UTF8.GetBytes(strSubject)) + "?=";

As a result I get:

Käyttörajan muutos

Does anyone have a solution for this problem?

Answer 1

The main problem was, when I was implementing subject from Request, I was using

HttpUtility.HtmlEncode(Request.Form["strSubject"]);

And this already encoded my string to "Käyttörajan muutos" .

So,

message.Subject = "=?utf-8?B?" + Convert.ToBase64String(Encoding.UTF8.GetBytes(strSubject)) + "?=";

works.