Why are non-Roman characters are sent as ?-marks recently?
For the past couple of months non-Roman characters (e.g. Japanese language and punctuation marks) are sent as ? marks. Use to be OK. How can this be corrected?
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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