The basic functionality that the FormMail package must provide is to send an e-mail that is packaged with both an HTML and a non-HTML version of the same content, which you appear to be saying that it is correctly doing. But perhaps the configuration setting isn't inserting the proper header into the HTML, to tell the recipient to expect UTF-8. (Just as web pages should do. Same thing.) And, pragmatically speaking, it just might be simplest to insert that yourself – e.g. using a Template. You need to be sending, in that portion of the message, a complete HTML package including both header and body portions ... after verifying that your mail client isn't the actual culprit by virtue of being clueless. If you can get it to hand you the body of the message ... or telnet into the mail server and get the message for yourself ... you should immediately be able to see if the encoding-spec is present or not in what the mail server is sending you.