ZIP File filename turns into garbled text

for Google Workspace Microsoft 365


The ZIP encrypted attachment file has shown filename in Garbled text.


Garbled text filename can result from many causes. Below are some of the conditions that frequently cause the issue.
Cause 1) Mailer could not recognize the language correctly
 Filename became「=?gb2312?」or「=?gb18030?」or the similar
 Ex)Filename became "=?gb2312?<Original Filename>.txt?="
 【Cause & Countermeasure】
Mailer has mistakenly recognized Japanese filename as Chinese.
You can confirm with Mailer Support for the solution to avoid this issue, or use English character instead.
Cause 2) Filename contains characters that are not included ISO-2022-JP
Filename that contains platform-dependent character such as "①②㈱" and "〠" or other special symbolic characters, or languages that contain double-bytes or multi-bytes characters.
**Note: Chinese and Thai languages are not supported.
 【Cause & Countermeasure】
Not only our encryption system, but many other systems also have issues in processing the special characters. To avoid the filename turning into garbled text, please use the English character instead.
Cause 3) File extraction system issue
Caused by the file extraction system or use the file extraction method that is not supported by our encryption system.
 【Cause & Countermeasure】
Please use the default extraction tool of your OS
Cause 4) Cause by the environment of WebUI that you've downloaded the ZIP file from
When using Japanese filename on Internet Explorer11
 【Cause & Countermeasure】
There is a possibility that the Internet Explorer browser is not in a good condition. You can try upgrading the version or use other browsers such as Google Chrome or Firefox instead.
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