I-Thunderbird Community Forum

When I open Thunderbird (Mozilla), my files are not current. In other words, the most recent emails, probably since the last time I used Thunderbird, in my file folders are missing. I have tried changing the server settings but I think they are correct. Please be patient with me, I am unfamiliar with all the terminology, etc. Also, when I first enter Thunderbird, it does not recognize my password. A window opens with the message "Login to server imap.postoffice.net with username john.fn@usa.net failed." That message also appears when I click on Get Messages. Thanks for any help.

For some reason, I am getting message that the Certificate for server is not valid (etc.). I can not get or send my emails as of this morning. Is there something I can do to resolve this issue?

This is a continuation of a problem I reported earlier... https://support.mozilla.org/en-US/questions/1442170

Updating to version 115.9 did not solve the problem. Today I updated to 115.10.1 and the problem persists. Thunderbird is also recommending that I update to version 116, but I don't even see that listed on the Mozilla web page for the change logs.

Thunderbird 115.10.1, Mac OS 10.13.6, iMac 20-in Early 2008 model.

I can open Thunderbird and check mail in multiple accounts. If I close the Thunderbird window (but leave the app running), CPU usage will eventually jump up to more than 100%. It does not happen right away, but could take 10 minutes or so. Currently it is at 115% processor usage. If I open the Thunderbird window again, the processor usage drops to under 8%, then drops again to below 0.4%.

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

HI, I have TBird 102.15.1 64Bit installed on several different PCs and laptops. On my main Laptop I checked the Roaming\Thunderbird folder properties and found the following: Size on Disk: 35.8 GB Contains 253,172 files and 1,533 Folders. Is their anyway I can reduce the size? My TBird seems to be running slowly and occasionally stalls. I do not want to switch back to Outlook client program, I am not a Microsoft supporter. I do know I could move mail to local folders but would that mean I could only access them from one machine? Thanks.

I have used Thunderbird for years without issue. In the last 2 days, it keeps crashing on one of my laptops (fine on the other). I sent a crash report, but I can't reopen Thunderbird. I tried both quitting and restarting. I shut down my computer and restarted it. I tried updating by downloading the latest version, but that didn't work either. I completely uninstalled it, reinstalled it, and it worked for a few hours. Now, it is back to the Crash Report.

Any suggestions? I love TB and don't want to switch to something else.

Christine

I've been using Thunderbird for years and never had any major problems until a few days ago. But ever since you automatically installed Version 128.4.2esr on my HP desktop running Windows 11, all I can get from Thunderbird is a blank screen unless I go into Troubleshoot mode. Subsequent automatic installation of Version 128.4.3esr did not help.

Thunderbird gobbles up too much of my SSD space!

How can I prevent this from happening?

I'm using Thunderbird 128.2.3esr (64-bit) Safari browser Version 18.0 (19619.1.26.111.10, 19619) Macbook Air M2 15" running OS 14.7

See attached screenshot

Thunderbird is not synchronizing with Mailfence. My other email accounts (Outlook, Gmail) work fine. TB connects to them, downloads message headers and displays the number of messages correctly. With Mailfence, the messages stop at "connected to imap.mailfence.com" and stalls there. The message disappears after a few seconds and nothing else happens. This happened this morning when I first launched TB. I then got an update to 128.11.1. No change. I did receive the Windows Update 2025-06 Cumulative Update sometime overnight prior to launching TB.

Hi I’m a very grateful Thunderbird user, for at least 10+yrs - and its always worked for me. I have done some pretty regular donations as well, to express my gratitude. On Wed my Thunderbird seized up on startup “Not Responding” and after about 5minutes of waiting I killed it with right hand top x. I have one imap and two pop accounts, plus about 7.2G of filed local mail The size on disk of my <profile> is 9.6G My connection to the mail server imap.sonic.net is a DSL ~ 1Mbits For the last two weeks, the writing emails, and saving has been a bit jerky – I assume having I’m Windows 11 latest (i7-9750H CPU @ 2.60GHz ram 16G.) with a C: drive 256G and d: 1000G. I have C:\Program Files\Mozilla Thunderbird - and been on the update channel, though not beta. D:\usr\a\n\AppData\Roaming\Thunderbird\Profiles\<MyProfileName> I copied the profile to a NAS for safe keeping. I ran through https://support.mozilla.org/en-US/kb/troubleshoot-mode-thunderbird

https://support.microsoft.com/en-us/help/12376/windows-10-start-your-pc-in-safe-mode

and for all same result on startup – seized up. I reinstalled Thunderbird Ver 128.4.3esr (64-bit) – seized up. I created a new profile – and starts ok I started using “thunderbird -p” and choosing profile and “work offline” to not pull in the pop account. I copied in the old profile 10G, deleted contents of imap – still seizing up, So I started judiciously deleting older .sqlite though didn’t keep track initially – and then was able to startup, though sometimes also went into being seized up. I went through local folders – folder properties – repair folder. I still have the orginal 10G that was seizing up - so I could do some debug if useful.

At startup of Thunderbird, get error related to Outlook which I do not use. Get message - "UserHasNoMailboxandNoLicenseAssignedError"

How do I get rid of this error, has been present since last esr release and expected it to go away with new release - did not. Do I have to reinstall Thunderbird to clear.

Am getting this message along with a recurring download of a specific email (keeps coming back even after deletion) that does not allow any other new messages to be downloaded. I do see new emails on my phone but will not read into Thunderbird??

Error: "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."

Tried: Troubleshooting, closing Thunberbird and reopening, rebooting windows system, compacting, etc. to no avail....

when i oppened tbird on windows 10, it showed a page to obly my for a donation. i had made a donation short ago, but eventhough, i just made another one time donation. when i open tbird again, i can not get out of the donation page. what should i do please???????

I was using Thunderbird for Windows 10 normally for many months. Recently, whenever I launch the app it immediately freezes, and I have to force quit the application. Reinstalling the app does not fix the issue. I haven't tried deleting my profiles yet, but I would like to avoid that if possible.

I have an e-mail in my TB in-box. The mail contains a hyperlink to Facebook. When I click on the hyperlink, I get the message copied above in the Subject of this problem. In almost all cases, if I re-click on the icon in the e-mail, the re-click takes me to the desired URL in Firefox. My Thunderbird is 128.11.1esr (64-bit). Why is the first click producing the error message? Would there be anything in the TB Error Console?

MESSAGES IN 'INFOLDER' ARE DELETED AFTER ABOUT 5-7 DAYS, and can't be found I have looked in all settings to try to find the reason, but don't find anything helpful tnx, Al email [edited from public] @ec.rr.com

When I use Mozilla's VPN service...many mozilla vpn servers will block me from sending out emails giving this error message:

Sending of the message failed. An error occurred while sending mail. The mail server responded: Service unavailable; Client host [23.234.88.xxx] blocked using clients.rbl.e-scout.net; host 23.234.88.xxx blocked due to abusive behavior from your network. Please contact servers@ispn.net for resolution.. Please check the message recipient "xxxxxxx@xxxxxxxxx.com" and try again.

Mosilla's VPN service is blocking its own Thunderbird software from functioning...lolol Are you going to fix this Mozilla??? Looks like you're tripping over your own feet...

Hi, tbird 128.3.0 esr 64b w11p. A prob new to me. Only for MS outlook mail (aka office365 email, but no ofc365 on my laptop, just the email in tbird). -in unified folder view, my MS mail acct (it still has the "hotmail.com" address, but works), is not present -- that's the problem. A workaround is that I can choose both "unified" and "all" views together -- but while the MS mail acct now appears in the folder pane at the top, as well as in its own "place" at the "accounts" area below, that MS mail acct not longer has its messages appearing in the "message list" pane. I have to go to MS Mail's own place below, in the folder pane (as stated above),to see its msgs. in msg pane.

 I could use the "all" view, but it's not as nice & I never have had to choose that before this prob.

- I did run "repair folder" for MS mail's own inbox (again, below, in its own place below, in folder pane, accts). And I restarted t-bird.No change in behavior, unified view does NOT list my hotmail emails.

I have used & am comfortable w/config ed, but only when I have the proper instructions you may post in your potential reply (I am not a coder).

Please advise, thank you.

сегодня столкнулся с проблемой, что не могу создать учетную запись, используя домены от mail.ru. на скриншоте показал результат моих действий: я как обычно ввел почту, поставил пароль, заранее в самой mail почте разрешил использование imap, а когда нажал готово и разрешил доступ в самом thundebird, то окошко с входом просто закрывается и пишет "не могу войти на сервер", хотя я даже не ввел пароль. это происходит со всеми доменами типо inbox и т.д, с gmail все работает нормально. помогите пожалуйста