Thunderbird Community Forum

I used to click the incoming Email and a box was highlighted for Reply? I have no desire to move from Windows 10. Why make it annoyingly difficult for older users?

Hi, I'm using Version 140.12.1e (64b). Is there any way to block and delete undesirable E-Mails om my Incoming box ? Even while being marked 'Undesirable', they stil coming again. Is there a way to erase them automatically ? Many thanks, Have a good day, Dan

Changed our broadband provider on Friday from PlusNet to EE and, since then, have been unable to reply to emails on my Thunderbird Mozilla account. I am still receiving them but when I attempt to reply I get the message:

"Sending of the message failed.

An error occurred while sending mail. The mail server responded: <X@dolhun.co.uk> recipient rejected - relay denied. Please check the message recipient "X@dolhun.co.uk" and try again."

Can anyone offer any help please? I am not very computer savvy unfortunately 'Regarding the question below which I have answered 149.0, to be honest I don't know which Thunderbird version I have but I had to fill in something!!

I'm trying to move from Windows to Linux without downloading all my imap messages again. What I've tried: 1. Install tbird on Linux, create new profile. 2. Close tbird. 3. Using Linux file manager,

 - delete contents of new profile folder
 - copy contents of old profile folder into new folder
 - delete Compatibility.ini in the copy

4. Open tbird with -p (profile manager)

I've tried twice with different results. The first time at step 4 I started offline. Thunderbird opened will all my previous tabs open, except that all the internet tabs reported connection failure - as expected. Under account settings, both local folders and my gmail account reported the correct (new, linux) path. When I went online and completed the gmail OAuth dialog thunderbird reported an inbox summary folder error, and deleted all the imap mbox files. I closed and restarted tbird- which failed with a crash dump. the terminal window reported successful minidump creation- the file manager showed the minidump file at zero size.

I repeated the process (recreating the original unmodified profile). This time at step 4 I started online, and tbird never opened- it generated the crash dump immediately.

Two questions: 1. Is it possible to transfer an imap profile and avoid re-downloading all the old messages? 2. What am I doing wrong that I'm getting the crash dumps?

Windows: [Compatibility] LastVersion=147.0_20260108190847/20260108190847 LastOSABI=WINNT_x86_64-msvc LastPlatformDir=C:\Program Files\Mozilla Thunderbird LastAppDir=C:\Program Files\Mozilla Thunderbird

Linux: [Compatibility] LastVersion=140.12.1_20260628021646/20260628021646 LastOSABI=Linux_x86_64-gcc3 LastPlatformDir=/initrd/mnt/dev_save/Thunderbird-portable64/thunderbird64 LastAppDir=/initrd/mnt/dev_save/Thunderbird-portable64/thunderbird64

It was working fine on the new computer until yesterday. Now I get a pop-up box that says: ' Unable to connect The connection was refused when attempting to contact localhost.

The site could be temporarily unavailable or too busy. Try again in a few moments.

If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure Thunderbird is permitted to access the web.

win10/tbird v140.12.1.esr wont d/l from yahoo. logon appears ok but the d/l bar starts & then just times out. This just started 3-4 days ago. gmail & fastmail ok.

Someone hacked my thunderbird account and I can't get to it. How can I find the password that is now associate with it? I was told the provider has to do that, but Spectrum can't do it. I tried independent software, but the password it recovered is an old one and it doesn't work. It doesn't show up in the list of saved passwords.

I have 3 email accounts which i unified. when log in I get prompted to enter password for all three accounts which I do, then I get prompted again to enter the password to all Password Manager to save my passwords which I do not want and therefore I uncheck it for all three; I then get prompted again for all three which I enter password, then I get imap login error on my main account which I click cancel a few times before it goes away,

I use Thunderbird portable. How do I fix this issue. it should be that one enters the password for each account once not three to four times. I do not want to use Password Manager to Save my accounts.

Also if ever I have to change password how do I do that? thank for your help.

I have the portable version, download from portable apps website.

Probably related to a Microsoft update, Thunderbird started asking for the password of my internet provider almost daily several weeks ago when sending or receiving messages. I am on Windows 11 and that is up to date.

In the Move Thunderbird data to a new computer article, it says under "An alternative method for Mac":

"CAUTION: Do not open Thunderbird again on the original computer - unless you repeat the process in reverse to transfer the folder contents back to the original computer before opening the app. (If you forget, you can manually check one version against the other to ensure important messages are retained, but it's messy and time consuming.)"

It's not entirely clear to me why this would be an issue, but it makes me wonder if that would make the following use case problematic:

1. The user already has Thunderbird on "Computer A" set up, and wants to copy their Thunderbird profile onto "Computer B" to get the same setup and email accounts on both computers. They intend on using both "Computer A" and "Computer B" simultaneously. For simplicity's sake, let's assume all email accounts use IMAP, so emails are synced with the server, and thus simultaneous access between multiple clients is possible.
2. The user follows the instructions to copy their Thunderbird profile from "Computer A" to "Computer B".
3. The user opens Thunderbird on "Computer B" to make sure everything is working (let's say it's working and emails are syncing to "Computer B").
4. The user then opens Thunderbird on "Computer A". Their expectation would be that they would see the same emails and settings as on "Computer B". If they composed/moved/deleted an email on either computer, those changes would sync and be visible on the other computer.

Would this be an issue? Or should the user just start anew on "Computer B" and manually sign in to all of their email accounts again?

Martin Belonje

Jul 15, 2026, 13:24 CST

Goodday,

Unfortunately I could not add a screenshot to this message. Under my account [redacted]@zonnet.nl there is a "Postvak IN". This means inbox. In this inbox should new mails appear. Right now there comes nothing in it. However, two lines below there is suddenly another "Postvak IN 22". New emails appear here now. I already tried to drag this inbox into the inbox under [redacted]@zonnet.nl but that doesn't work.

New emails now appear with a yellow bar: The text in the yellow bar at the bottom says: (I translated)

No unique identity was found matching the sender address. The message will be sent using the sender field and the settings of the identity Martin Belonje <[redacted]@zonnet.nl>.

To my opinion this has to do with the fact that the inbox has moved from its original position.

I hope you can help me out.

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.

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

1. il m'est demandé de me connecter à mon adresse [[mail|https://accounts.google.com/v3/signin/identifier?opparams=%253F&dsh=S453932297%3A1784021273638275&client_id=406964657835-aq8lmia8j95dhl1a2bvharmfk3t1hgqj.apps.googleusercontent.com&login_hint=michel.prevost32%40gmail.com&o2v=1&redirect_uri=http%3A%2F%2Flocalhost&response_type=code&scope=https%3A%2F%2Fmail.google.com%2F&service=lso&flowName=GeneralOAuthLite&continue=https%3A%2F%2Faccounts.google.com%2Fsignin%2Foauth%2Flegacy%2Fconsent%3Fauthuser%3Dunknown%26part%3DAJi8hANVRLcqE03NldyjSOQKD_ICIw-S2SCBh-6vI4e-27LKaMkwOFsE4ZsbM4KuR9h1phP_R5MTBFNrHmlexCie4O3pYyxa0C1iaZ7KlW7iDhD81uqkpGXCUp40Sa5ojDAHbs4R4qubHhWyiKnYjYFSEln6Fb-xUdqsiv0Ub8egIAQ6zcw7b3UoDeUOROPOnCsX-UWBXV04QuFZW_OrhIewatCn_QzrrLrRjHpNxS0nYNrK-MsMIMUd2F_NMQU0pAuEMK4YqwyWb3kzPS8hS9vbwFDb6X89fob2CCD11Ao3a76Gnc5qtR4bNek6uVX10vZwJtztrMDawovZONiyF9_kG8EeHcBtXhm1snMpm74e-AYhgEwqF0ZmrAHo5gVQa3wwN63tbrE8evUJxTpbofiAh598-FbaSZg1xiww-wzqjeY3UmcAPXkOW2AV5oi8m1I3Aoa_ApsL%26flowName%3DGeneralOAuthFlow%26as%3DS453932297%253A1784021273638275%26client_id%3D406964657835-aq8lmia8j95dhl1a2bvharmfk3t1hgqj.apps.googleusercontent.com%23&app_domain=http%3A%2F%2Flocalhost&rart=ANgoxcfiR05M5QkoVyIE0hpFkMCItNQ0h5RdqQk9Hem3ZYYJ85-l3JFKwD3nFA3uiM3Ybf26hJx1Dk4FfURpF4jxkODkEEefdunI4EhgFoES9OCpHsbQS20]] google: lorsque je coche "suivant" j'ai erreur 400

que faire sans détruire mes mails? salutations respectueuses

When an email that is part of a thread is selected the delete button changes places with archive so I end up with a bunch of archives I don't want because I get a lot of mail and delete is my favorite key to spam.

Is there a way of changing this placement behavior or do I need to hack the source and if I do need to go hacking can someone point me in the direction of the file with this evil thing.

Good morning,

I’m reaching out because I’m having trouble with my Thunderbird email and need some assistance.

I was using Thunderbird without any issues before, but now all my old emails have disappeared. I can still receive new messages, but I’m unable to send emails like I used to. I also can’t recover or view any of my previous emails.

It seems like something may have reset or become corrupted, and I’m not sure how to restore my old messages or fix the sending issue.

Could you please help me get Thunderbird working properly again and recover my old emails if possible?

Thank you for your support.

Dee