how to fix spam action notify encode problem

[jeff chen]

the subject charset display correct if we use thunderbird to get notify(utf8) mail.
it will get wrong charset of subject (outlook) at same notify mail. Is it Possible to fix the problem? Or where is send mail module file that we can fix it by our self.

Thunderbird   notify  subject: {Spam not delivered} NOVA台中英才店》迎夏動茲動 一起i運動
Outlook           notify  subject: {Spam not delivered} NOVA?唬葉?望?摨€?憭??脣? 銝€韏搏??

Jeff Chen
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