The conversion from emoticons to wingding J's occurred at the server level. I've sent emails in Mutt through an exchange server that, when quoted back to me, ha

The conversion from emoticons to wingding J's occurred at the server level. I've sent emails in Mutt through an exchange server that, when quoted back to me, had the ASCII smileys converted to J's. Exchange converts all emails that go through it to HTML; it's wrapping the J in <font> tags to select Wingdings. Some Exchange installations do not provide plain-text copies of emails sent through them.