Javamail changing charset of subject line

I am using Javamail (javax.mail) to send mails. I successfully adjusted contents of my mail as utf-8. However I could not set subject line as a utf-8 encoded string.

I tried even

mail.setSubject(new String(subject.getBytes("utf-8"), "utf-8"));
 

on subject however it still sends as Cp1252. Example headers from mail are given below:

Any ideas?

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