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Suddenly I cannot send foreign language font with Thunderbird. I still can receive in foreign language font though.

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I used to be able to send and receive Japanese language through Thunderbird. Starting a few days ago that the messages I sent in Japanese garbled at receiving end. I don't have problem sending and receiving in Japanese by Yahoo Mail or bu Gmail. It would be appreciated if someone can help me find a solution.

I used to be able to send and receive Japanese language through Thunderbird. Starting a few days ago that the messages I sent in Japanese garbled at receiving end. I don't have problem sending and receiving in Japanese by Yahoo Mail or bu Gmail. It would be appreciated if someone can help me find a solution.

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Yahoo mail servers affect any message with accented characters, special symbols, double spaces etc. unless you change a preference in TB:

https://support.mozilla.org/en-US/questions/1260169

http://kb.mozillazine.org/Yahoo#Characters_are_replaced_by_question_marks