I'm working on a multi-lingual site that uses UTF-8 encoding throughout to cope with the many languages in use, including Russian and Polish. The system sends emails to users and I'm having problems with the subject line and non-standard characters. The body of the email can be handled by setting the (HTML) encoding to UTF-8 but what happens with the subject line which, it seems, is a Windows box of some kind? The site is written in PHP and utf8_decode only decodes to ISO8859-1, which is no good for Russian or Polish. How can I get my UTF8 characters to display correctly in the subject line for these languages? Jon