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I'm using thunderbird for gmail account, and I struggle to mark some events notification as completed when they are deleted using gmail interface. They keep on poping up but when I hit `Dismiss` it gives me this error: ``` Status Code: 2147500037, The request cannot be processed.

Server Replied with 400 If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view. ```

I don't want to make my calendar read-only because I'm still gonna use it but I can't remove these annoying pop-ups because of the error. Please help what can I do

On 9/10/24, I tried to download my email and got the message: "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox." To my knowledge, nothing had changed on my Win 10 computer, so why this is suddenly showing up is unclear. I have 555 GB of free space on my C: drive, so space isn't an issue. I don't know why the permissions would have changed.

I checked the TB help and found that there was an update, so I installed that. I checked for updates a second time and found another one which I applied too. TB is now at "128.2.0esr (32-bit)" according to Help > About.

I tried restarting TB in troubleshooting mode, but that didn't help. Can someone suggest a way out of this?

Thanks in advance.

I can't find a setting that will allow marking messages as read only after I read them. By that I mean only after I click on the message to open it in its own tab. I view the new messages in a split screen.

The current settings allow me to leave them bold as if I hadn't read them even after I've clicked on the message and viewed it in the full TB pane

or

Mark them as read as soon as they're displayed in the bottom half of the split screen.

I don't find either of these options desirable.

I apologize in advance for the language, I'm writing from a translator. Thunderbird on several accounts, every few days requires a password ... "login to the server failed, enter a new password". Just in case, I changed the passwords on these accounts (with the option to remember), a few days of peace and again the problem. However, logging in with the old passwords before and the new ones now on the server is no problem at all.

I reinstalled TB but unfortunately it doesn't help. The same on the stationary and laptop, what could be the problem? Currently, email is available only on the server, I do not have access to Thunderbird.

Hello and THANK YOU for Thunderbird and I am looking so forward to getting off Outlook! I am about 4/5 way through setting it up on my desktop.

I currently keep my calendar on Outlook. I have been able to import my folders, contacts and mail, but when I go to import the Calendar, the box on import cannot be selected. Is there something else that I need to do to bring over my calendar? Did I miss step when I did the initial set up?

Att made me change my account password. Now Thunderbird cannot access messages. I have entered the new password in out going and incoming but there seems to be more to this than that because nothing happens. Where do I have to put in new passwords? Thanks so much. Marjorie

As you can see in the screenshot, the umlauts are missing in many emails. Unfortunately, the corresponding fonts can no longer be set in Thunderbird; I use version 140.6.0esr (32-bit). Where can I set that ä, ö, ü, ß (...) are displayed normally? Greetings from Berlin, Markus

I made a mistake. I had 128 and went up to 140. It pretty much looks the same, but a big difference is an extension I always use says it will not work with 140. I don't care how good 140 might be; if I can't use my app, QUICKTEXT, then I don't need this. How do I go back to 128 or to a version that works with my extension?

I have been having much trouble with Thunderbird. The latest problem is with the Sent folder. When I try to Compact Folders I get the message "The folder 'Sent on Local' 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 plenty of disk space and have Full Control. I tried creating a temporary folder and moving all the Sent messages to it, so that Sent had zero messages. I still got the same message. The file listing showed Sent to have a size of 182 MB even though it didn't contain any messages. I've tried deleting sent.msf to force Thunderbird to recreate the index - didn't work. I tried using Repair Folder. That worked, but when I tried Compacting Folders again it found another folder with the same problem. I fixed that one and then it said the Sent folder was bad once again. I'm going around in circles!

I've deleted and recreated scores of .msf files for various reasons, trying to get Thunderbird to work without errors, but as soon as I get one problem fixed, another one crops up. I'd conclude that it's my computer, except that I'm not having any problems with other programs.

Any thoughts on this particular problem or Thunderbird problems in general? Thanks.

Hello community!

I use Thunderbird desktop for two emails: personal outlook.com (ms365 or whatever ma calls it) and school exchange account.

Exchange works fine using owl and is able to sync calendar correctly. For personal email, it appears I can only connect via imap instead of MS’s protocol, which limits its ability to sync calendar. I’m wondering if there’s a way to login personal ms email similar to exchange to sync calendar etc.?

Thx in advance for ur help :-)

Using Tbird 115 (or later) can gmail contacts be the listing used in Tbird and be in synch when changes are made in the gmail contacts list. There appear to be various methods and I seek the best and simplest. Thanks

Taskbar icon does not indicate when new mail has arrived. Does not show a count of new/unread messages. 128.3.2 Windows 11

In settings "incoming mail" icon options I have chosen "show count of new emails" and "show a tray icon for unread messages is checked".

I am unable to tell at a glance if new email has arrived. I see from researching the KB I'm not the only to have this issue, but none of the settings seem to help.

Thunderbird Version 142.0 will open when I chose a file to send to mail recipient using win 11, but the new email screen doesn't open so no file attaches. All my defaults are correct, there is a proper mail recipient entry in the appdata sendto file and there is a key in the registry for Thunderbird under client mail.

Two questions:

1) My TBird v115.18 (32-bit, Windows 7) no longer allows me to get emails from the server. This just started today (7/17/25). I get a message that says there are no emails. The emails download properly on my Windows 10 PC with the latest 64-bit program. Is there anything I can do or change that will restore that function on my Win7 PC?

2) Is there a 64-bit version that will run on a Windows 7 PC and perhaps solve the problem in #1 above? If so, how can I get the proper 64-bit version? The latest TBird 64-bit will not run on Windows 7.

Thanks for any and all help.

TC

I get a message like this every time I start Thunderbird. The topic came up last year but the conclusion was along the lines of "...this problem will be fixed in version 128" but it was never clear whether or not the User followed Mozilla's support replies or what they had to do to clear the email message from Thunderbird. .....Well I'm running version 128.1.1esr and the problem still exists.

My questions:

1. What is Thunderbird trying to do? Compact individual email files? Compae from ct the whole Thunderbird Profiles folder?

2. Is the problem the size of the Profiles folder or the overall size of the hard drive the Profiles folder resides on? What is the Hard/solidstate drive is the maximum?

3. Is the problem related to the amount of Free Space left on the Hard/solidstate drive or is the issue the number of individual files?

4. Is the issue related to the number of Thunderbird files and/or folders OR is it related to the total number of files and/or folders on the hard drive?

5. Is there a limit to the number of sub-folder levels that Thunderbird can navigate?

Thank you.

Tom

Tom O'Brien TOBrienArchitect@gmail.com

Hello,

I am running Thunderbird 140.1.1 esr on a Win 10 Pro laptop. In the past, when I inserted an image into an email, Thunderbird offered to resize that image. Now, it just inserts the image, even if it is very large, and doesn't give me that option anymore. So I need to first resize it before adding it.

Is there a setting that will allow the resizing, or has Thunderbird changed how it handles inserted images. I tried the "Advanced Edit" option, but those changes don't "take" and the image is inserted as is.

Also - when I do try to add an image - the inbox becomes the primary window and I need to "find" the compose page to see the email. That didn't used to happen either.

Thanks for any help!

TN

Running Thunderbird with three accounts on my desktop PC - two 'btinternet.com' accounts and one 'gmail.com' account. Inboxes have no more than 20 emails in them, as I delete unwanted ones and transfer others to various sub-folders ( In excess of 40 No.). Today I suddenly found that incoming emails on both bt accounts were not showing the subject or sender and the content is displayed in plain text (txt) format - no problem with the gmail account.

I have compacted and repaired the inbox folders but no difference. If I send a message from either of the bt accounts to the other the problem occurs, but if I send a message from either of the bt accounts to my gmail account, it goes through fine. I can receive bt emails fine on my laptop. I assume this is a thunderbird problem on my PC but not sure where to start - would be really grateful for any guidance.

I have added the android app to my phone and tablet but the messages are not synchronising fully with the version on my windows laptop. The 'sent' messages from my phone / tablet do not appear on my laptop although 'received' messages do. 'Sent' messages using the app do not appear in my Gmail linked account either. Any advice would be welcome please, it's a bit of a hassle having to keep checking things on separate machines.

Hi,

I need help on topic "Outlook, PST, EML and local folders".

I have .. - Win 10, 64 bit - Outlook 2010 - current thunderbird, first time installed 10 days ago (newbie!) - a huge, locally stored PST file with a lot of folders, like "in_2014 / In_2015 / .. / Out_2014 / Out_2015"

I want .. - to have access to the mails in the PST with Thunderbird.

I did .. - read some information and found that there is no direct access - install ImportExportTools NG - tried to import "Via Outlook", but failed: "No profile found". I think Outlook 2010 is too old - install "Outlook Viewer" from CoolUtils. Opened the PST, exported a lot of EML-files, one for every single mail. - defined a "Local folder", called "in_2014" - copied the EMLs to this folder. They appear in the folder-tree of Thunderbird, but not as single "mails". I have to open (doubleclick) every EML to see the mail. - tried to "Import" the data (one by one / many together / from folder) to the local folder, but got a long error message with a lot a strange error-codes - tried to export data from PST to one single EML with many mails in it. Failed, the software does not offer this feature. - tried to "Import" the EML to a folder of a mail account. This was successful, but only the first step. - tried to move / copy the currently imported mails from mail-account to my local folder: failed again without reaction and without message.

What can I do now? How to get mails from a PST to a locally stored, Thunderbird readable structure?

Thanks in advance for help.