Are you sure email headers may have an UTF-8 encoding? IIRC you can only use ASCII in headers.

this site at least claims so:

In general, email headers must contain only US-ASCII characters. Headers that contain non US-ASCII characters must be encoded so that they contain only US-ASCII characters. This process involves using either "B"(BASE64) or "Q"(Quoted-Printable) to encode certain characters.
If you could use an alternative encoding in the headers, there would be the slight problem of how to read the "Content-type" header if it could be in any encoding? :-)

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Sending UTF-8 e-mail by Joost
in thread Sending UTF-8 e-mail by angus_w_chan

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