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Your latest request for donations has evidently come with a forced upgrade which I did not authorise. I have been happily using an older version of TB because it supports my add-ons and themes. Now because of your uninvited intrusion they no longer work. Furthermore it seems that I can no longer download an older version that supports my requirements. NOT HAPPY!

I like to setup a bulk email where it would make send. Is there way I can add all emails in the collection address without having to go to all of them.

i attached the address book. So when I open a new message. How can I ensure all collected address are grabbed to the BCC field?

We been using Thunderbird for over 20 years and used MozBackup while it was supported and used it a few times when something got corrupted. To migrate from one PC to a new PC, we always used the "manual method" described below. As our files are 10.2 GB (mine) and 6.4 GBMB(wife's) in size, that goes like this:

If your profile folder is larger than 2 GB, you need to use your file manager and create a backup copy of your profile folder yourself.

1. To find your profile folder, you can use the Open profile folder link in the first step of the Export tool. You will see the contents of your profile folder in your file manager. The profile folder has a name like abc12defg.default-release. 2. Select and copy the entire content (content only, not the folder) of your profile folder. 3. Create an empty folder where you want to keep your backup, e.g. on a USB flash drive. You can choose a helpful folder name like Thunderbird_profile_backup_2022-06-28. 4. Paste the contents of your profile folder into your empty target folder.

On the larger 10.2 GB filetransfer, after launching TB on the new machine there was a lot of the spinning circle icon appearing / disappearing ... then it just stopped, gave it some time. Rebooted and all was fine with the world. Most accounts were accessible, one was not and I copied that from the desktop open on the same desk.

With the 6.4 GB file transfer to wife's laptop, it did not work ... tried again, no luck.

Tried my 10.2 GB file on wife's laptop and it worked fine. Can't understand why, after each attempt TB was uninstalled and everything TB related was removed from roaming folder. System was rebooted, searched for anything TB related, rebooted, installed TB, closed it, copied folder contents into profile folder on laptop, Rebooted and no go.

It will take the 10.2 GB file but not the 6.4 ... I'm confused.

How is this supposed to work? I am hoping to have a couple of folders from my IMAP configured email account automatically synchronized to LOCAL FOLDERS. But under the 'Synchronization' tab there are not a lot of options, and really only a 'download' button. But does that really synchronize? prevent duplicates? Someone smarter than me, please advise? Thanks in advance John

In the new 140.0.1esr eclipse version the menu bar has lost Tools. When I right click and go to "Customize toolbar" there is not an option to add either 'Tools' or 'Message Filters', the later being what I would prefer to add to the tool bar (see attached image). I now have to click the hamburger icon -> select Tools -> Message Filters. If I could add 'Tools' or 'Message Filters' into the menu bar (for Mail messages since there are segregated menu bars now) it would be so much easier. I use the Message Filters function frequently so having to go through several steps to get to it now is very inconvenient in this new version.

When I change a setting in TB it doesn't save it and reverts to old settings on restart. There is no "Save" button on the settings screen. I have looked for the Prefs.js file in the Profile folder to see if it's read only but it doesn't exist. I have checked that hidden files are not hidden in the explorer view setting. I have searched my entire c drive for prefs.js and the only ones there are in the Firefox profile folder. I have looked for any .js, .json files that resemble anything to do with preferences or configurations and see none. All the advice I can find on Google has been exhausted. Help!!

T B 128.12 The Window which shows saved passwords is TOO SMALL. Cannot see the full entries. Also, the little 2 sided window to expand the entry does NOT work. As it is, it is practically useless.

I was forced to erase my PC because it was infected with malware. I saved my Tbird profile to my HDD before erasing. I pasted the saved profile to %Appdata% >Thunderbird, copying 1,777 items. When I brought up Tbird, I got the Account Setup window, so I don't think the profile was actually there. What did I do wrong?

Keep getting this message: "The folder "inbox on [email address]' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

I have tons of space, but I don't know which folder you are referring me to. Does it have a name? Does it reside in a specific subfolder? Can you give me some hints to locate the folder? Is this really the problem, or does the message indicate something else is amiss.

Thanks, Don

Is there a font setting to change JUST the font size (event title field) that is displayed on the TB Calendar monthly grid view. Was able to change overall size in TB, but did not really want same change on mail views? Perhaps a specific TB setting (or userchrome command)?

Yes, I did see the question on Calendar Event font size changes, but not applicable to this as I read it...

Thanks for any suggestions, if any....

I have used the same reply header (set up using Config Editor, IIRC) for so many years that I have forgotten the syntax - which should not be a problem, except that I cannot find it anywhere - certainly not in Help. Can someone direct me to the reply header syntax description?

If I receive and save emails as a .eml file and open in a text editor, I can see there is a "received" day and time and then further down I see a "date" day and time. Thunderbird seems to default to the "date" day and time when the email shows in the message list whereas other email clients use the "received" day and time.

As an example, a large group email written/sent at 10:06 am today - the "date" field is 10:06. The "received field" shows 11:39 am. In this example, the original writer did send at 10:06 but it did not arrive in my inbox until 11:39. Thunderbird shows/sorts the email to 10:06. Other email apps like Gmail, Outlook and Ipads mail app all show/sort the email as 11:39.

I've tried sorting Thunderbird by Date and by Received but the order stays the same regardless.

This issue isn't always noticeable because in most cases, the "Date" and "Received" are within a few seconds of each other.

I can appreciate Thunderbird lists sorting by Date and Received, but it seems like its not working correctly.

TB 140 on Win 10 and 11, and TB for Android - same on all apps.

Updated to Thunderbird 116 for Mac and now cannot send emails -- on two different machines: one an iMac (OS 18.5), the other a MacBook (OS 17.x).

About 10 or 20 seconds after hitting "Send", we get an error message saying "Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: EHLO [13 hex characters] internal error AUP#EML-005."

Our settings and password have not changed, and they are all correct according to our ISP.

Have tried a clean re-install. Did not help.

What to do?

I changed hosting services because support on the former one gradually became nonexistent. Okay, now I have two sets of mailboxes on Thunderbird, one set on the old server (messages up to February 2025) and one set on the new server (all messages thereafter). Yesterday I set about migrating to get all the messages onto the new server so that I can discontinue the old service entirely. Mailbox by mailbox I copied my entire email filing system successfully – with one exception. When I tried to do this with my "Sent" mailbox, the messages just don't move.

Okay, try a workaround: on the old server I created a new mailbox called "Sent messages" (in contrast to the built-in "Sent" mailbox). I moved all my messages from the "Sent" mailbox to that one. Success. Now I tried moving (or copying using the alt key) messages from "sent messages" to a mailbox of the same name on the new server. Nothing happens. Or perhaps, sometimes it copies the one message that I directly pointed to but will not do a mass move or copy.

I'm guessing that it has an issue with moving messages that are 'from me'. But I really want to save this history! is there some good way around this issue?

Hello, I'm trying to deploy a dynamic HTML signature on Thunderbird 140 ESR using policies.json. The goal is to pull user data (full name, job title, phone number) from our Active Directory.

The PostMessage policy for setting the signature is completely ignored. However, other policies like DisableAppUpdate work perfectly, so I know policies.json is being read correctly.

Troubleshooting has confirmed this is not a path or permission issue, as the signature also fails when using a local file (file:///C:/...) and even when the signature is set as direct text inside the policy itself.

Is this a known bug or issue in v140 ESR? Is there a reliable method to deploy a dynamic signature from AD via policy?

Thank you.

Hi Folks - This is a silly question, I'm sure and if there's something in Settings I'm missing, my apologies!

But, with the new version, when I leave my Inbox - whether it's to write an email or read one that has been sent to me - and I return, the Inbox is very briefly empty, then all of the emails in the Inbox show up in a, for lack of a better term, cascading effect.

Everything's working fine - but seeing this every single time is a bit disconcerting. Help?

TB New V140 has an issue: when adding a new email account the wizard stays in a loop, no information why and no option any more to add the account data manually. No idea why it's necessary to keep users out from a manual setup and let them use a not working apple style wizard....

Me and my colleague are using the same email account on Thunderbird. How do I delete the account from only my Thunderbird app? My colleague will still need access to it.

In Thunderbird mail I set Appearance to my personal preferences...

For me my preferences are : Table View, Non Threaded and Sort By Date In Descending Order Applied to all folders...

There does not seem to be any specific function to save these settings.

So... Whenever I restart my computer my preference settings are ignored and my email account subsequently displays the opposite settings.

Am I missing something --- Or is this a new bug ? It never used to be an issue !