1917941 - saving message locally fails without notice because of non allowed characters <> on exfat partition

Status: RESOLVED DUPLICATE of bug 2018026

(Thunderbird :: Untriaged, defect)

Description

[Eric Forgeot]

User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0

Steps to reproduce:

I'm trying to save a message on an exfat partition.

Open a message, select "save as" (ctrl +s). A dialog appears, and the file name is premade from subject, name, email address and date, like that:

Subject - "Surname Name" <[e-mail]> - 2024-08-22 1350.eml

I clic on save, the dialog close and doesn't return any error, as if the email was correctly saved locally.

Actual results:

< and > characters are not allowed on this exfat filesystem. Because of the email address surrounded by <> , it will failed to save, silently.

After "saving" the file, we can't find it, and no error was reported.

Expected results:

1/ the template for the save file name should rather be:
Subject - "Surname Name" [e-mail] - 2024-08-22 1350.eml

2/ in the case the file can't be saved, thunderbird should report a feedback to the user, telling about the error, prompting to rename the file

3/ for most problematics characters (<> ? , : ! etc), TB could display a warning to the user, suggesting to change the problematic characters

I've seen the option value mail.save_msg_filename_underscores_for_space it could have something similar to automatically rename such characters with underscore.