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Attachment displays size unknown. I am unable to save, download or open. Most of the online fixes suggest searching for mime under config editor. This does not seem to exist in this version. Using windows 11, TB 137.0.2

A mail folder appears suddenly corrupted. The imap folder in question is duplicated but both folders are empty. In my Profile Folder the three associated files/folders have been duplicated - the new variants have weird file names. See screenshot.

If someone can advise on the best strategy to fix this I would be most grateful!

Thank you

Graham

In the past I have had no problems creating email subfolders for the various accounts I have configured. Specifically, my folder structure hierarchy for the problem at hand looks like this:

MyAccountName |- Templates {what is this? A system folder?} |- Expected subfolder A |- Expected subfolder B |- etcetera

When I try to create a new subfolder directly under MyAccountName (right click on MyAccountName > New Folder), Thunderbird creates the folder, but as a subfolder of the account inbox. I can't drag it from my inbox down to MyAccountName. I don't want it as an inbox subfolder, I want it in line with the rest of my subfolder hierarchy. Does this weird "Templates" thing have anything to do with it? And what am I doing wrong?

We use multiple emails that share the same folders. I have been trying to sort the emails using filters, so obviously I have to create the folders prior to sorting. It allows me to create the following pathway. Under one user but seen by all users Winter 2025-2026/Registered Soccer/11v11/2018 GIRLS U8/TEAM NAME 1/REGISTRATION Winter 2025-2026/Registered Soccer/11v11/2018 GIRLS U8/TEAM NAME 1/WAIVERS Winter 2025-2026/Registered Soccer/11v11/2018 GIRLS U8/TEAM NAME 1/CONFLICTS Winter 2025-2026/Registered Soccer/11v11/2018 BOYS U8/TEAM NAME 1/REGISTRATION Winter 2025-2026/Registered Soccer/11v11/2018 BOYS U8/TEAM NAME 1/WAIVERS Winter 2025-2026/Registered Soccer/11v11/2018 BOYS U8/TEAM NAME 1.......THIS IS WHERE IT STOPS LETTING ME CREATE THE SUBFOLDERS AND NOW ITS NOT LETTING US DELETE THE FOLDER EITHER. Is there a limit on the number of subfolders each parent folder can have ?? If not what is causing it to not allow me to create the folder? when I say will not allow I am referring to the create button being grayed out and if I change the name of the file and it ends up showing me the create folder button and upon hitting the botton the pop up screen disappears but it does not create the folder. can someone please help me resolve this issue

From the moment i changed my mobile phone end august, which I used as internet connection for my 2 computers, connected by a usb cable to each computer, connection by cable is now on refused, so i had to install wifi connection which works. BUT => from my address michel.balawender@wanadoo.fr, host orange, thunderbird ask repetitively password, and refuses any sending. Once I had somebody to check : a new installation of thunderbird did work ... for 2 days. Then somebody did change my password at orange contract, (which caused hours for getting back again all messages); it worked for one day ... I have no problem with other mailing adresses for instance gmail. There after, my help message in french without any help from ubuntu forum. Thank you for your benevolence. Michel Balawender

Problème récurrent sur mes 2 pc "Échec de la connexion depuis le serveur smtp.orange avec le nom d'utilisateur "adresse mail". Saisir un nouveau mot de passe => annuler => réessayer"

Je reçois des mails, mais impossible d'en envoyer à partir de thunderbird. Un informaticien m'avait supprimé l'adresse mail chez orange, puis l'a re créée avec un nouveau mdp, sur chacun de mes pc.

Eh bien patatras, ça recommence sur le pc fixe d'abord (version thunderbird 102.11.0) puis le pc portable (version 115.16.0) est contaminé. Je suis passé entretemps de la 16.04 à la 18.04.6 sur le fixe, et suis sur la 20.04 sur le portable : je n'ai pas le sentiment que la version d'ubuntu soit concernée par le pb.

Il faut donc que je règle le pb créé par thunderbird. En attendant, je passe par l'application mail orange, ce qui est bien fastidieux.

J'ai fouillé sur le forum, sans trouver de piste. Merci pour votre bienveillance.

День добрый! Был архив почты, который всегда открывался. Сегодня почта пуста, нет писем и ничего более. Проблема вся в том, что я когда-то работал в компании, которая уже закрылась и больше не работает, а почту использовал как базу данных. Теперь у меня нет доступа не к почте, не к базе данных. Что делать в такой ситуации?

Hi, I have been using Thunderbird for a long time and never had any issues until last Thursday. I was able to connect to my ISP email server but it ended up showing no new emails even though I know that I have emails as I am able to see them on my iPhone. So thinking that something changed, I removed my account details from Thunderbird and try to reconnect. The first stage, the detection of my ISP email server passed with no problems.

See the first attachment.

So after seeing this, I click on the Done button and then the problem arises.

See the second attachment.

Now to cover some other important information. I talked with my ISP and we checked the configuration manually that is shown in both attachments and they were completely correct to their files. No deviation in any manner. We trip POP3 and also IMAP settings and still got the same error as the second attachment. I and the tech support person from my ISP also checked the typing of my password, the original one and even the new password 10x. I also typed each character of my password slowly, just in case I typed it wrong having it visible to me and invisible to me and still got the same error as the second attachment. Also the images are from today January 29, 2025 approximately from the last 20 minutes. So this is fresh for an attempt to connect to my ISP email server, not just from some previous attempt.

Hopefully I can get a work around from the forum. Oh, one more thing I have the latest Mozilla Thunderbird that is available and that is Version 128.6.1esr (64-bit) as I had updated it before I attempted to connect to the ISP email server. I have done no uninstalls.

I had Thunderbird suddenly quit responding last night. None of my past emails or menus or panels showed or anything. Just everything gray. I tried reloading, looking at settings, etc., and finally ended up uninstalling and reinstalling. That brought my email back, and my old emails, but no address book contents. I finally got the address book loading screens, and when I loaded in the Collected address book using the automatic import feature, I got 8800 gobbledygook meaningless entries. I can't find a legit profile folder for any legible addresses, so I am going to simply re-create my 50 or so addresses, but I need to get rid of 8800+ garbage address book entries.

HOWEVER, these 8800 meaningless, mostly empty, addresses are clogging up my Collected Addresses, and I have tried Mozilla's advice, Windows 10's advice, etc. through several means, to EMPTY this address file. It's the same old problem of nothing works, or the instructions are invalid for the latest version ( just like Windows 10 ! ). I am surely not going to hand-delete 8800 bad addresses ! Is there no straightforward way to EMPTY an entire address folder ? It does not seem so. I have even tried all the "You should be able to ..." suggestions online. I am stuck. I understand I cannot delete the folder proper; I just want to clear it out. Thanks for any help.

Bryan Glett Bellefontaine, OH sbglett@embarqmail.com OR Aussage55@gmail.com contributing user

Thunderbird v. 115.10.1 (64-bit) Windows 10

Several months ago I experienced Inbox email loss whenever I clicked "Compact now" in the "Compact folders" dialog. After a couple of occurrences I trained myself to only click "Remind me later" thus avoiding the email loss. Today I goofed and clicked "Compact now". Many important opened and unopened emails disappeared from my Inbox as a result. I waited a while to make sure Compact folders had completed the operation but no lost emails reappeared. I shut down and relaunched Thunderbird but no lost emails reappeared. I don't know if any of my other folders have experienced this email loss.

My most recent backup will restore some of what was lost from my Inbox. But not the new unread emails.

What can I do to prevent this from happening again? Can I disable "Compact folders" completely so the problem never re-occurs?

I haven't upgraded to Thunderbird 116.0 because my backups are from v. 115.10.1 and I have experienced problems restoring Thunderbird with a previous versioned backup.

Thanks in advance for your advice.

Can I use Thunderbird to build an incremental local backup/archive of all messages transiting (incoming/outgoing) a webmail account ?

Any idea how to achieve this ?

My problem is:

• A POP3 account will miss all folders except the Inbox. (It's a pity that POP4 has not gained traction yet.)
• An IMAP account creates a mirror, not a backup. Remote deletions in the webmail account must not delete messages from my backup and vice versa.

detailed requirements:

• one-way sync only, since a local backup/archive must be built, not a mirror (two-way synchronization):
• Remote deletions must not cause local deletions (otherwise it would be a mirror, not an archive/backup).
• Local move/delete operations must not be reflected back to the mail server.
• Read‐only access to the mail server: no moves, deletes or flags remotely.
• All messages in all folders must be included in the backup: Inbox, Sent, custom folders, etc. Since POP3 can only back up the Inbox, I will probably have to settle for IMAP to include all folders.
• No duplicates: Messages must not be stored locally more than once.
• Messages must be stored as full offline copies locally (not just headers).

Not able to connect Mailbox.org account with Thunderbird. I've attempted signing in with my email-app specific password from the service, normal password for logging in and made sure the settings are all correct. It works on Thunderbird for Android instantaneously but not for Thunderbird nor the standard Linux email app on my laptop running the latest version of Fedora

I use Mozilla Thunderbird to import and manage my GMail account. It has always worked very well. I have a large number of folders in the Mozilla Thunderbird program (parallels those in Gmail) and, frankly, use it as a filing system. This morning when I went into Thunderbird I discovered that the emails stored in the folders were all gone, except for those from about May 14th 2025 or more recent than that. I have lost a huge amount of information that was kept in those emails in folders. I checked the ALL MAIL folder in Thunderbird and those emails are gone from that folder as well. I followed the instructions Google gave me to check Trash and Spam folders and try to repair the folder but this is doing nothing. I also went directly to GMail and these same emails have been deleted from those folders as well. I have years of important information stored in emails in the Mozilla Thunderbird account and want to know why they disappeared and, most importantly, how they can be retrieved and I can orpevent this happening againin the future! Thanks you for helping solve this problem. I cannot stress enough how much of my professional and personal life is captured in the emails I had stored in the Thunderbird folders so anything you can do to help will be greatly appreciated. Thanks,

Harvey Weingarten

Subfolders within a saves subfolder have disappeared! They contain important information and emails. I need them back. How do I get them back? In 2025? On a Mac computer?