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I have had to replace my laptop and am trying to set up my new one with an existing outlook account on the new device.

It is a Windows 11 device.

I have used the exact server settings etc from my old lap top for the outlook account but get a variety of error messages.

I have explored the use of the Account Hub and also switched that off/on. Same situation.

I attach five screen captured images so far. The first is the version of TB. The second is the window that appears when the account tries to connect and thirdly the small pop up that appears bottom right hand corner of laptop. The remaining two show the server settings and that they passed the connection test.

Other email accounts (gmail & yahoo) have both been set up on the new device and work well.

The account worked on the old laptop and continues to do so. I have set up the outlook account with, to the best of my knowledge, the same settings. The old lap top was a windows 10 device. The new laptop does not have a third party antivirus on it.

I am baffled as to what is happening and what I should do next. Any advice would be great.

A few days ago I lost all of my saved email messages, plus "sent" emails, and "deleted" emails. I had important information stored there for future use. I am hoping to be able to retrieve it. Any help would be appreciated. Thank you!

I often categorize my mail in differents files and subfolders. This morning I was checking my mail when I discovered that the subfolder "Agile Retraite' under the file called "Retraite" had diseapeared completely from thunderbird. Could you tell me how to get it back ?

Thunderbird 140.7.1 i have a subfolder called "purchases" which I add to on a regular basis. Suddenly no messages appear after May 2014 I have logged in directly to the mail server, and all the missing messages are definitely on the server. I have checked the local filters, none are set. I have tried properties/repair. I have tried removing ~/.thunderbird/xxx/ImapMail/mail.myserver.com.au/INBOX.sbd/purchases.msf

Could it be a problem with dovecot indexing on the server? all the other subfolders seem to work fine. It's just this one.

Windooze 11. TBird 152.0 installed on June 20th. Now it seems like TBird is not displaying HTML emails properly. They are displayed but not at the beginning. The first line is sometimes just the bottom half of a sentence in the email (if that makes sense). I can't scroll back to the beginning. If I go to outlook and display the same email it displays fine.

Did something change in 152.0 to cause this?

Thanks, Ed Mazurek

Hallo, ich habe gesehen dass ältere Mails in meinem Posteingang zwar noch von der Überschrift vorhanden waren aber wenn ich drauf klickte waren die Mail leer, ohne Inhalt. Ich habe dann den Rechtsklick gemacht und auf reparieren gedrückt - jetzt sind diese Mails ganz aus dem Posteingang verschwunden!

Ich hab nun im Internet ein bisschen gelesen, da wird davon gesprochen die msf (?) datei zu suchen und diese zu löschen. Und beim neuen öffnen von Thundermail würden dann die Mails alle geladen werden...Ehrlich, da traue ich mich nicht so wirklich dran, löschen hört sich immer so "böse" an...

Zur Verdeutlichung: ich habe den reinen Posteingangsordner und in diesem Posteingangsordner liegen viele Unterordner als seperate Ordner. Und eben diese separten Ordner die als Unterordner im Posteingangsordern sind dürfen NICHT gelöscht werden!

Also Hände davon lassen oder kann da nichts passieren?

Danke schonmal für Eure Hilfe.

I made a folder and saved emails in that folder. A few days later they were all gone, empty folder. I followed suggestions on here, did the repair, erased password and replaced it, did the subscribe, and now even the folder is gone. I spent hours trying to research this and repair it and now I have nothing.

I apologize for the unhelpful summary line, but I am totally new to Thunderbird and the Unified Inbox is acting so strangely that I don't have any simple way to describe it.

Many (but not all) of the emails are displayed twice in the list of messages.

When I delete a message that isn't doubled, the message disappears from the inbox (as it should).

But when I delete one of the doubled messages ONE disappears as it should and on the other Thunderbird clears the From and Subject fields and changes the date to 12/31/1969, 19:00 -- the changed entry stays in the list and the body of the email is still shown in the lower pane. The only way I can get rid of the message is by selecting another folder (ANY other folder) then when I return to the Unified Inbox the deleted messages will be gone from the list.

I can't believe that this is how Thunderbird is supposed to work, so I assume I have something configured incorrectly (although nearly everything is still at the defaults that the installation gave me).

Hello all,

Apologies if this is going over old ground. I've tried the usual Repair Folder fix without success and I'm cautious about trying anything further without some expert input for fear of doing more damage.

Thunderbird version: 140.12.1esr (64-bit) Windows version: 11 Server type: POP, messages not left on server Inbox " Folder properties" reports: 16384 messages. 13.8GB on disk

The Entire contents of Inbox disappeared after the following sequence of actions: 1. Tagging a selection of messages (in Inbox). 2. Making only those tagged messages visible (using Quick Filter). 3. Selecting all of the visible messages (select first, shift-select last). 4. Deleting the selected messages (Del key) The intended messages were successfully moved to the Deleted folder.

The Inbox now appeared empty. At this point only tagged messages were set to be visible but these had been deleted so an empty Inbox pane seemed correct. Resetting the tags visibility of Quick Filter did not make the messages reappear.

The messages are however visible and openable when doing either a straight folder search or when using a search folder. Inbox Folder Properties reports that the messages are still present and the reported size on disk seems appropriate for the number of messages.

Messages in all of the other folders are visible.

At this point I did a complete Export of the profile. When I discovered that Windows would not recognise the resulting .zip file I also did a straight copy of the Inbox file within the profile folder to a safe location (I understand that the export .zip file is intended for re-import to Thunderbird and that Windows might not recognise it).

I then did a Repair Folder (within Folder Properties dialogue). This made no difference although the size of the Inbox.msf file reduced dramatically (I didn't make a note of the before and after sizes).

I then quit and restarted Thunderbird several times. This at first made no difference. After perhaps 3 or 4 restarts however a relatively small number of files have reappeared in Inbox (a tiny percentage of the correct total). Curiously, most of these (but not all) are marked as spam. Ordinarily I would delete all messages marked as spam but there are probably some that I have missed. It looks rather as if the files which are now visible in Inbox are ALL of the spam messages plus a handful of others. Of the 172 messages which are now visible they were initially correctly reported in the folder pane as being 172 unread messages.

Another strange thing is that when selecting the Inbox on the folder pane, the small number of messages which become visible only appear after a delay of perhaps 10 seconds (previously this was instantaneous). When selecting any other folder, the messages are displayed instantly.

I'm not quite sure what best to do next. I haven't yet tried deleting the Inbox.msf file. Any wisdom will be gratefully received.

Thanks in advance.

I just can't get Thunderbird to work. Will not send or receive emails. I had chat gpt help, still nothing. I tried last year when I had windows 10, still didn't work.

Guy

Name Thunderbird Version 152.0 Build ID 20260612011159

[edited email from public] @gmail.com

This has been happening for a long long time - probably a few years' worth of versions. I have just put up with it... currently running Tbird 147 and it just happened.

When editing an email (either the body or the Subject), if you use the backspace button (the one that deletes to the left) to delete some text sometimes the cursor will incorrectly be positioned about 5 or 6 characters further left than it should.

For example, if I had the text: "Quick brown fox jumps over the moon"

If I were to highlight "fox" in the above example, and hit backspace, I would expect the cursor to end up positioned between the remaining spaces after 'brown' ( pipe symbol here is meant to represent the cursor position): "brown | jumps"

But instead what happens is that the cursor ends up somewhere among/before the word "brown". It's always further left than it should be, by 5 or 6 characters.

I believe it only happens when highlighting multiple characters and then hitting backspace. It may be more (only?) prevalent when editing/replying to an existing email. (But I'm still only editing the new portions that I add at the top of the email; I'm almost never editing in amongst the original quoted email content.)

I also haven't ever been able to figure out how to make it happen, sorry. It is just random...It will happen once in an email, but then not again. But it happens frequently - 3-6 times a day perhaps. (Depends on how many emails I am editing.  :) )

I don't believe that I have noticed this issue if I were using the Delete button (deletes things to the right). I don't think it happens when backspacing one character at a time...but it might. I also use Option-Backspace to delete whole words at a time (instead of highlighting the word); not exactly sure if it happens only if highlighting a word, or only if Option-Backspace, or single key press... sorry, it is so random and unexpected that I don't have more specifics.

Hello, so finally this happens to me too. I lost all my emails in Inbox before August 2025. I think it happened after one of these usual alerts 'you should compress emails'. I did this in the past 6, 7 years and nothing was lost so far. I also have plenty of space on my computer, that's not a thing. I tried a couple things I found in web but doesn't help. Couple emails that I had for example in an 'important' folder are still there. I'm really annoyed. I didn't had a glue at all that this compression alert will delete files in the inbox one day, only those in the trash box. Maybe there is a last chance to get them back but I'm afraid that they are gone forever and I will put everything from my inbox into an other folder in future or maybe even better go back to Apple Email where this never ever happened in the past 25 years.

Thank you, Chris

I am really in a panic: Using ubuntu 22.04 and Thunderbird 140.7.1.esr For my main account I keep some 40 sub-folders and sub-sub-folders. All but the most recent mails in my sub folders are gone, something like 4 years of email. I asked chatGPT for help and found inside the /mail folder that most of the files with the names of my sub folders with no extension have 0 kb. I don't use IMAPS because I wanted my mails on my computer so I use only POP. :-( The interesting thing is that this only happend to my main account. I have 6 more accounts in Thunderbird and they seem to be fine, at least for now. Thank you for any help. Kind regards Frank

Incoming messages are interspersed with old messages without any order. I tried to corrrect this by pressing "date" in the installation column to the right, but that does not help.

Cut the cable a couple months ago. Have been using Firefox/Tbird many years. Stopped being able to access old email address of 25 years a couple days ago. When opened Tbird would always got to old email and say "couldn't log in" or something. Would cancel out of that twice, click on new address and collect new address email. Old email was always there, used it as reference during transition. At settings chose new as default and deleted old address. Looks like the boxes checked would not have deleted old email but it's gone. 3500+ of them. No warning, message, choice, nothing. took zero time. Cannot change in Mozilla login to new email address. Tried Tbird import tool, could seem to figure it out. Also need to update email in Mozilla. Help. Tks. x@yahoo.com

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