How can I generate an email with a subject line with international characters in it?

The content encoding headers define how the body of the message is to be interpreted, but the subject is a header, and isn't subject (ha ha) to the declaration of the conten开发者_如何学Got type/encoding headers.

Is there a way to make international character set subject lines?

https://www.rfc-editor.org/rfc/rfc2047 defines encoding of non-ascii characters in headers.

"=?" charset "?" encoding "?" encoded-text "?="

Yes. RFC 2047 specifies how.