1792383 - Subject display correctly in mail lists and headers with gb2312 encoding while not specified with charset=gb2312

Status: RESOLVED DUPLICATE of bug 1779070

(Thunderbird :: Folder and Message Lists, defect)

Description

[jilinwang]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36 Edg/105.0.1343.50

Steps to reproduce:

received a mail with charset=gb2312

Actual results:

Mail subject not correctly displayed with charset=gb2312, in message lists window and message head window.

Expected results:

Mail subject should be shown correcty with charset=gb2312

Comment 1

[jilinwang]

Attachment: drag_to_mail_list_window.eml

This is a eml file which can show the bug.

Comment 2

[jilinwang]

Attachment: gb2312_multi-part.eml

another mail

Comment 3

[Alfred Peters [:infofrommozilla]]

(In reply to jilinwang from comment #1)

Created attachment 9296306 [details]
drag_to_mail_list_window.eml

There is no charset declared in this email at all.

(In reply to jilinwang from comment #2)

Created attachment 9296309 [details]
gb2312_multi-part.eml

Here the charset is indeed specified in the multipart body, but the header is not MIME-encoded. The specification in the body is irrelevant for the header.

Unless otherwise specified, Thunderbird always uses UTF-8 as default.

Comment 4

[jilinwang]

OK. So it is clear now why the subject isn't shown correctly. Thanks
However it is still a boring issue since I cannot control the sender's mail software.

Comment 5

[jilinwang]

And when there is no charset declared at all, the mail subject use utf-8 while the body use gb2312, it's still incomprehensible.