use a mail proxy, but the Chinese characters of some mails will turn into question marks or garbled characters.

[NICK_k]

I use a mail proxy, but the Chinese characters of some mails will turn into question marks or garbled characters..
This is not the case with every email, and some emails can display Chinese characters normally.
How can I solve this problem

 

[hata_ph]

try compare the raw format of the email to determine which unicode is having the problem.