Tickets :: Comment on [#14011] filename becomes ???.txt if not English of .txt

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Comment	> if I compose new email and attach a file with non English characters > (e.g.: ????.txt / ??.txt) , the attachment filename will be changed > to ???.txt > > This only happen for .txt file, but no problem for .png > > Even I just save it in draft, it is also ???.txt > > Below is part of mail source, you can see .png is using utf-8 but > .txt is using us-ascii, I think it is the core problem. > > --=_niDwCrm6H6ppSnSrbXnJVqo > Content-Type: text/plain; name=us-ascii''%3F%3F%3F%3F.txt > Content-Disposition: attachment; size=10; > filename=us-ascii''%3F%3F%3F%3F.txt > > fjskafjsal > --=_niDwCrm6H6ppSnSrbXnJVqo > Content-Type: image/png; > name=utf-8''%E3%82%81%E3%81%BE%E3%81%97%E3%81%A6.png > Content-Disposition: attachment; size=7736; > filename=utf-8''%E3%82%81%E3%81%BE%E3%81%97%E3%81%A6.png > Content-Transfer-Encoding: base64
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