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More than 1 attached file overridden by the option "Save all" #10965
I have used the search function to see if someone else has already submitted the same bug report.
I will describe the problem with as much detail as possible.
App
Thunderbird for Android
App version
18.0
Where did you get the app from?
F-Droid
Android version
16.0 - LineageOS
Device model
No response
Steps to reproduce
Write a new email
Attach more than 1 file (for example 3 files with the same extension type: text_1.txt, text_2.txt, text_3.txt)
Write your subject and body content
Send it to yourself
Once received, open it and click on the attachments button "View all"
Your three files will be listed at the bottom popup that appears. Click on "Save all"
Select a folder destination and save them
Now open your folder explorer and check the three files... all three are the same (same size, same content). Thunderbird saved correctly the third one, but the first and the second file are just a copy of the third one (renamed).
Expected behavior
I expect to save all my attachments with the original content
Actual behavior
Thunderbird corrupts attachments files when you download more than two files using the option "Save all".
But if I download them individually (not clicking on "Save all") the files keep the original content and works as expected.
Logs
No response
Reacted by Élia „KopfKrieg“, Fabian Thomas, Leo and ykahveci
I have the same problem; also newest app version (18.0) on android 16 (samsung). Multiple different attachment files (in my case it was images) will arbitrarily turn into one of the attachments. But the filenames of the copies will be the same as the original ones shown in the mail.
Reacted by joarod-eu, Élia „KopfKrieg“ and Jonas Bjørge Andersen
We tested this when merging this PR and the fix was found to work. Just to be sure, I tested again in our current beta build available on F-Droid (which is v24.0b2, will be v24.0 in release), and it still works. You should see the fix in the latest full release.
Activity
platform34 commentedon Apr 30, 2026
I'm able to replicate the issue outlined by the OP.
F4400 commentedon May 1, 2026
I have the same problem; also newest app version (18.0) on android 16 (samsung). Multiple different attachment files (in my case it was images) will arbitrarily turn into one of the attachments. But the filenames of the copies will be the same as the original ones shown in the mail.
NotBjoggisAtAll commentedon May 31, 2026
I also have the same issue
aarantala commentedon Jun 5, 2026
I have exactly the same problem - K-9 Mail v. 19.2 and Samsung Galaxy S23/Android v.15 (OneUI 7.0)
androidfan-byte commentedon Jun 14, 2026
Same problem on Thunderbird v19.0, Android 14
WoWi1963 commentedon Jun 26, 2026
I got the same issue, in Thunderbird 20.0 and K9-Mail 20.0
JonnyTech commentedon Oct 6, 2026
From the changelog, this is reported as fixed in v24.0 - has anyone been able to test and confirm?
dani-zilla commentedon Oct 6, 2026
We tested this when merging this PR and the fix was found to work. Just to be sure, I tested again in our current beta build available on F-Droid (which is v24.0b2, will be v24.0 in release), and it still works. You should see the fix in the latest full release.
JonnyTech commentedon Oct 7, 2026
It has now landed in f-droid and I can confirm that it works correctly. Thanks to all.