Migrating from [very] old Thunderbird to current version

I've been using Thunderbird for many years. My current version is 45.2.0. My computer runs Linux Kubuntu 15.10 So yes, it's ten years old and it's showing its age. I hav… (read more)

I've been using Thunderbird for many years. My current version is 45.2.0. My computer runs Linux Kubuntu 15.10

So yes, it's ten years old and it's showing its age. I have a new box I built, and have Kubuntu 25.04 installed. It installed the then current version of TB. I have yet to set things up, but migrating is a priority now.

Some solutions say (on ubuntu/kubuntu) to just copy the directory "/home/username/.thunderbird/profile.default" from the old to the new box. I would likely do it by zip, rar or ssh transfer.

If I do that, when opening up TB on the new box, does the data get converted? and if so, is it automatic? It seems to me that after then years, the data format would have some changes.

I'd appreciate any insight on this. Thank you.

Asked by zyzoff 26 minutes ago

Last reply by david 12 minutes ago

Profile Folder Rename/ESR to Release

I recently upgraded Thunderbird from v140.7-ESR to v147-Release and would be grateful if someone could answer some questions. After upgrading I noticed there are 3 pro… (read more)

I recently upgraded Thunderbird from v140.7-ESR to v147-Release and would be grateful if someone could answer some questions.

After upgrading I noticed there are 3 profile folders even though I am the only user of my Win11 laptop.

Profile Folders 92yfgi88.default-esr - 3.654 GB - 2026/01/23 12:50:27 >> My profile jf63jfuk.default-default - 1.533 GB - 2024/06/05 21:27:32 y9efj7q9.default - 47 Byte - 2026/01/23 12:30:15

The folder y9efj7q9.default only contains 2 files - parent.lock (0kb) and times.json (1kb).

1. Can I safely delete profiles I don't use?

2. Why is -ESR still shown at end of my profile folder name? - I thought it would be renamed when I changed to the release channel version.

3. Can I manually rename my profile folder? - I know I can rename a profile using Profile Manager but this doesn't rename the folder.

4. If not possible to rename my "92yfgi88.default-esr" folder, I assume I can just copy it's contents to another new profile folder and tell TBird to start using that?

5. Can I use Windows File Explorer to delete/rename profiles, or must this be done from within Thunderbird?

Also, any idea why Thunderbird Notifications still show as coming from Mozilla Thunderbird ESR, even though I now use the Release version? I've checked Windows 11 System > Notifications and it is still shown there as Mozilla Thunderbird ESR.. Why? and how to fix?

Thanks in advance..

Asked by VeeBee 1 day ago

Last reply by david 15 minutes ago

  • Solved

why are account numbers not sequential?

I have 4 IMAP accounts and 1 local account. I would expect them to be shown as account 1,2,3,4,5, but Thunderbird's troubleshooting info shows them as 1,2,5,7,8. Please … (read more)

I have 4 IMAP accounts and 1 local account. I would expect them to be shown as account 1,2,3,4,5, but Thunderbird's troubleshooting info shows them as 1,2,5,7,8. Please see attached picture.

Any idea why? Has something gone wrong? They all seem to be working ok.

Asked by VeeBee 22 hours ago

Answered by david 22 hours ago

I tried to save an out going sent message as it was being sent. After the message was sent all of my saved messages in all folders and subfolders are gone.

bold text As a message was being sent I tried to save it before the message was completely sent. When the dust cleared all of my saved messages are gone in all folders a… (read more)

bold text As a message was being sent I tried to save it before the message was completely sent.

When the dust cleared all of my saved messages are gone in all folders and subfolders.

I closed Thuderbird and reopened it. - no saved messages.

I restarted my Macbook Air and opened Thunderbird - no saved messages.

All software was up to date. All other programs seem to be OK.

Now what?

Asked by Firefox on Bryan's Devices 2 hours ago

Thunderbird mail viser tekniske detaljer ved vidersend

Jeg har modtaget en mail som jeg vil videresende til en anden person. De modtagene mail ser sådan ud se billede Skærmbillede 2026-01-28 152737.jpg Når jeg sende denne bes… (read more)

Jeg har modtaget en mail som jeg vil videresende til en anden person. De modtagene mail ser sådan ud se billede Skærmbillede 2026-01-28 152737.jpg Når jeg sende denne besked videre kommer der først en lang teknisk liste, se skærmbillede Skærmbillede 2026-01-28 153123.jpg

Hvordan undgår jeg at få al den unødvendig information ?

Med venlig hilsen Michail Grunnet mobil 40559069

Asked by Michail Grunnet 2 hours ago

An error occurred while sending mail.

I have 2 parallel accounts with the same ISP. As of 2 days ago, whenever I try to send mail, I get this message: “Sending of the message failed. An error occurred while s… (read more)

I have 2 parallel accounts with the same ISP. As of 2 days ago, whenever I try to send mail, I get this message: “Sending of the message failed. An error occurred while sending mail. The mail server responded: Command rejected. Please verify that your email address is correct in your account settings and try again.” I receive mail as normal. Using the other address with exactly the same settings allows me to send normally as I have for the past ten years! Nothing appears different anywhere in the settings. There were no upgrades that I am aware of. I have since found that I can send from my basic little "travel" computer without issue. Any ideas? BTW, using POP mail settings.

Asked by wayne.mackinnon 1 day ago

Last reply by david 4 hours ago

Failed to connect to server

Good Afternoon Theres 2 accounts under the same username.One is working fine and the other one displays the error notification "Failed to connect to server mackie. when I… (read more)

Good Afternoon Theres 2 accounts under the same username.One is working fine and the other one displays the error notification "Failed to connect to server mackie. when I press on inbox. What confuses me is that it has the same names but has different folders underneath it.I need the one that displays the error messages to be fixed.

Asked by Keith Mackie 1 day ago

Last reply by david 4 hours ago

how to add a account gmail to thunderbird

I had an account gmail in thunderbird I lost it because I had to change the password and did not find to change it in thunderbird. I want to add this account in thinderbi… (read more)

I had an account gmail in thunderbird I lost it because I had to change the password and did not find to change it in thunderbird. I want to add this account in thinderbird but did not succeed. Can you tell me all what to do, I had always a window of Google that open but I do not understand what to do with it.

Asked by legeran0 1 day ago

Last reply by david 4 hours ago

Clicking on unread messages makes first conversation thread expand

Hello, As per title, when I step on a new message not belonging to the first thread, the first thread expands automatically. This does not happen when I step on an alrea… (read more)

Hello,

As per title, when I step on a new message not belonging to the first thread, the first thread expands automatically. This does not happen when I step on an already read message. I also tried to mark old messages as unread, and the same thing happens. Apparently, it started doing this today, which sounds weird as thunderbird last updated on the 15th, but I didn't notice this type of behaviour before today.

Thunderbird version: Thunderbird Windows MSIX package 1.0 - 140.7.0esr (64 bits)

Vertical view - Cards view

Asked by tgab 8 hours ago

Google workspace OAuth

I'm trying to set up my thunderbird client (Version 147.0) to work with my Google Workspace. I understand that I should choose OAuth as the login method. The problem is t… (read more)

I'm trying to set up my thunderbird client (Version 147.0) to work with my Google Workspace. I understand that I should choose OAuth as the login method. The problem is that the option is not available when I try to create the account. There are only "normal password", "Encrypted password", "Kerberos/GSSAIP", "NTML" and "TLS certificate". What am I doing wrong?

Asked by Anders Astridsson 1 day ago

Last reply by Anders Astridsson 8 hours ago

Peer's certificate has expired

Hi. I'm using Thunderbird for my POP account and it has stopped sending messages. It just says, Sending of the message failed. Peer's certificate has expired. The config… (read more)

Hi. I'm using Thunderbird for my POP account and it has stopped sending messages. It just says, Sending of the message failed. Peer's certificate has expired. The configuration related to (my server name) must be corrected. What am I to do?

Asked by earthfrequency 10 hours ago