java - UTF-8 characters not getting displayed -

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when run junit test case invoke standalone application sends mail characters getting displayed in mail when application runs on different machine through thread displayed ? instead of real characters. program of mine sends uses sendmail of unix , remote machine uses postfix. can think of possible reasons of problem?

show code. likely, aren't explicitly specifying character encoding want use, , default on 1 platform works expect, , default on doesn't.


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