#2872 Garbled Japanese text

[KAZUTOMO ISHIDA]

SquirrelMail バージョン 1.4.23 [SVN]
(squirrelmail-20261029_0200-SVN.stable)
The body text of the Japanese-language emails I receive appears garbled.
It seems that either the sm_encode_html_special_chars() function is not working correctly, or the $encoding parameter passed to it is incorrect.