charset=utf8 and Mac mailers

[John Delacour]

Can someone tell me if "utf8" is valid in a charset declaration. I ask because I notice that neither Mail.app nor Eudora on the Macintosh (MacOS 10.2.8) will recognise it and decode text so sent and will insist on "utf-8" or "UTF-8" in the Content-Type decalration, presumably because the Text Encoding Converter lists only the hyphenated version.


JD