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misconversion (mojibake) of some mails in Japanese

Thunderbird Languages
tishi replied 13 hours ago
tishi
tishi

misconversion (mojibake) does not happen when a mail header is as below. Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64

misconversion (mojibake) happens when a mail header is as below. Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit

It seems encoding in my Thunderbird does not match 8bit. Several years ago Thunderbird had an option to modify text encoding but I cannot find such an option in the recent versions. It would be really appreciated if anyone help. Thank you.

misconversion (mojibake) does not happen when a mail header is as below. Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: base64 misconversion (mojibake) happens when a mail header is as below. Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit It seems encoding in my Thunderbird does not match 8bit. Several years ago Thunderbird had an option to modify text encoding but I cannot find such an option in the recent versions. It would be really appreciated if anyone help. Thank you.

All Replies (2)

Yu5tiqX9og
Yu5tiqX9og

The following link might be helpful: https://support.mozilla.org/en-US/questions/1552171#answer-1783787

tishi
tishi Question owner

Thank you for your suggestion. I tried it but unfortunately it does not work...

I think this problem is caused by a sender and by a receiver separately. At least a mail from a sender with encoding by base64 does not cause this problem. And there is a receiver who can read a mail without misconversion (mojibake) even if encoded by 8bit. I would like to know the latter case in detail.

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