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My thunderbird would not open. Said the file location couldn’t be found. I read online it recommended that I uninstall the application and reinstall. This fixed my issue with being able to access thunderbird but during the install all of my local folders were removed. Is there anyway I can get these back? I also lost all of my address book contacts.

Hi There,

I am trying to add my new email address to the thunderbird app for Windows and running into issues syncing it through IMAP settings. The process seems to go smoothly until it gets to the point where I have to enter my email password. After I enter my password and hit "continue" I get the following error message:

Component returned failure code: 0x804b000a (NS_ERROR_MALFORMED_URI) [nsIIOService.newURI]

I have attached the screen shots of my process, as well as the IMAP and SMTP settings from my email provider.

Any help I can get in troubleshooting this error would be greatly appreciated.

Thank you,

Tim

I'm having a lot of trouble with moving my years of POP mail accounts to a new computer using IMAP.

I'm starting with my mail AOL account but Synchronizing TB the web account folder structure just isn't working. My initial installation went fine, but I can't seem to modify the folders and use message filters.

The initial installation basically duplicated the web account folder structure automatically, but making modifications isn't working.

I can't even delete test folders I set up on TB. I select them and try to delete, but they never are deleted. On IMAP accounts, how does the sync work?

My pop email has stopped collecting email, so I guess there is no turning back at this point.

Po użyciu funkcji „Porządkuj folder” w Thunderbirdzie część wiadomości w folderze Odebrane zaczęła wyświetlać się bez Tematu i Nadawcy/Korespondenta. Daty wiadomości są widoczne.

Konto działa przez IMAP. W webmailu wszystkie wiadomości są widoczne poprawnie wraz z tematami i nadawcami, więc problem występuje tylko w Thunderbirdzie.

Próbowałem już:

• Napraw folder – bez efektu,
• usunięcia lokalnych plików INBOX i INBOX.msf.

HELP! My inbox "SUBJECT" and "FROM" are not matching. Thunderbird keeps jumbling my emails in my inbox so that the sender's email does NOT correlate to the correct email they sent... The order of the different columns in the inbox do not lineup - Thunderbird changes the sender name, or the subject. Hope that makes sense. For example I click on an email from my boss regarding a shift and an email from Voile skis comes up about some new products. The subject is the same one that is in the email but the "FROM" is my boss' email! Please help, I have quit re-opened, opened in "troubleshoot" mode, made sure I am in the newest update, etc. Thanks

I have used Thunderbird with the same email account for years, creating subfolders and moving emails to the subfolders with no issues.

With Thunderbird 153.0.1, after creating a new subfolder in the account, when attempting to move emails to the new folder, I receive the following error:

"Thunderbird: The current command did not succeed. The email server responded: APPEND invalid flag list"

Hi, I was trying to find a particular email and was playing with a couple of filters. I ended up with all of my inbox in alphabetical order. In other words, all the senders' names starting with A are at the top, and conversely all the Z' s are at the bottom. How do I put them back in the order received please? Many thanks, John.

Hello,

I am struggling to set up calendar and contacts sync between Thunderbird (v155@ubuntu26.04) and my google account. I use a university account to access google services, so my google account is not some.name@gmail.com but some.name@myuniversity.cz. I understand that Thunderbird somehow needs to invoke OAuth2 process with google, but I do not know, what to fill in the "Hostname" or "Location" fields for Contacts and Calendar, respectively. Any help? Thank you.

I have three AOL accounts for various reasons. Until recently, all three were available and working in Thunderbird - no issues. A few days ago on start-up, I had a pop-up requesting indicating that my password for one of these accounts had not been recognised in Thunderbird. The account was working fine on another device, ipad. Re-entering the password didn't give me access to the account, and in desperation I deleted the account from Thunderbird. I then tried to re-create it, but although Thunderbird shows all the correct(?) details in the account settings, it actually just gets all the ...box contents from another of my accounts. Does anyone have any ideas how Thunderbird references existing account when add a new mail account, or how to stop Thunderbird referencing an existing account please?

After a long explanation, I tried to add a file and lost everything. Starting over! After using TB for over 30 years, I accumulated a large number of personal folders to archive files to. Due to confusion on my part about pass words in Proton Mail and their Bridge, I had to reinstall my ProtonMail account into Thunderbird. Because all my personal folders were connected with the old "account" name, I didn't remove it, and the new addition seemed to be working fine.

After doing some house cleaning to remove duplicate and obsolete files, I wanted to move the folders attached to the old account name, under the new name. I thought I could carefully move my personal folders from the old account, back under the new Protonmail account. Sadly, that doesn't work like that. What I did find was that the original folders which come under the original "account", were created with an older version of TB, which put them in a folder on my HD. But the new default folders ("inbox", "draft", "sent" etc.) are mirrors of the Protonmail Bridge, which is NOT what I want.

So I need someone that knows how to either place the old folders back under the NEW "account", or how to create new folders that ARE on the HD, and then move the files from one place to the other.

Just to help clarify, here's the location of the old folders as per the "properties" info.

mailbox:///E:/thunderbird data/thunderbird/yetudx3p.default/Mail/Local Folders/Friends & family

You can see the address for this folder is on my Drive E: I can go directly to that address on my drive E and see each of the files.

imap://gshantz%40protonmail.com@127.0.0.1/Folders/2009

This folder is from the NEW account of Protonmail - bridge, and is obviously the web address of Protonmail. It is NOT editable, unlike the above location on my HD E:.

Any help or suggestion would be greatly appreciated, gshantz

Hallo zusammen. Ich kann seid etwa 2 Wochen keine Nachrichten mehr in meinen Lokalen Ordner archivieren. Habe schon sehr viel ausprobiert: - Papierkorb geleert - Archiv komprimiert - Lokalen Ordner neu aufgebaut (.msf-Dateien entfernt) - komplett neues leeres Archiv an einem neuen Speicherort erstellt. Es kommt immer die selbe Meldung: Die Nachricht konnte nicht in den Ordner "Archiv/2026/2026-09 in Lokale Ordner" verschoben oder kopiert werden, da das Schreiben in den Ordner fehlgeschlagen ist. Um Speicherplatz frei zu machen, wählen Sie aus dem Menü "Datei" zuerst "Papierkorb leeren" und dann "Alle Ordner des Kontos komprimieren". Versuchen Sie es dann nochmals. Hat jemand eine Idee wie ich das beheben kann?

Most other email clients I've used have had a way to manually "expunge" a mailbox, i.e. delete the messages which are marked for deletion. This includes Thunderbird on a machine at home (I'm traveling right now).

On this laptop I'm using Thunderbird 102.12.0 on macOS 26.6.2. All of my mailboxes use IMAP. Thunderbird is using Maildir for local storage on this laptop, and I believe the same is true on the machine at home (also macOS 26.6.x, not sure of the exact Thunderbird version), but I won't be able to verify this until I get home tomorrow evening.

On both machines, when I delete a message, the message list shows that message with a line through it, corresponding to the IMAP "marked for deletion" flag. The same is true on the other email clients I've used over the years.

On the machine at home , when I right-click on an account's "Inbox" folder, there is a "Compress folder" option which expunges the deleted messages from the mailbox. This option is not present in Thunderbird on this laptop.

So my questions are ...

• Is the menu item I'm talking about, only present when the account uses MBOX for local storage, and maybe I missed a step when I created the account on the machine at home? (If so, I know how to fix that when I get home.)
• Every email client I remember using, all the way back to the original `pine` in the mid-1990's, has had an "expunge" command of some kind. Does Thunderbird really not have a way to manually expunge a mailbox? If so, this seems like a fundamental oversight on the part of the Mozilla developers.
• Or is there a way to do it, and my old eyes just aren't seeing it on the menus? (which is entirely possible)

Thanks.

(Side question, totally unrelated) ... why does the text entry control I'm typing this message into, have its own markup language instead of using standard Markdown? (And yes I am, at least in part, being old and gumbly here ... you kids get off my lawn!)

I moved emails from my inbox to three different folders, including my deleted folder. All have disappeared and I don't know where to look to find them. I thought it might just be the system being slow so exited and re=entered. But the emails have still not shown up in the folders I moved them to. Any suggestions as to where to look or how to recover welcome.

I am in the midst of the long process of moving most (not all!) of my gmail from the gmail server to TBird, using filters as discussed in this thread.

I've started by first using filters on less important emails (ie so that no true disaster occurs if something goes horribly wrong). As I do so, I have questions!

For example, let's say I use a filter to: copy all the emails from @someone.org to a local folder then delete those emails (from the server)

What happens if one of those emails happens to be within a thread, including emails from people who don't match the filter (ie are not @someone.org). Have I broken the thread forever, ie, has something gone horribly wrong? If so, how do I prevent this behavior/have the entire thread move along with the targeted value? If not, I don't see how I can move email without breaking threads, which is a bit of a problem.

(Also - whoops, I see I should update, but the question remains.)

My correspondents keep getting shuffled and applied to the wrong subject line in the inbox. It was suggested that I right-click on the folder, select "properties" and then "repair." That clears it up, but only for a matter of hours. Plus, any emails that I have open get closed and then I have to find them again.

One person who suggested that I right-click the folder and repair it said if that didn't work, there was a more technical fix. I need it!

Help!