Forum zhromadźenstwa Thunderbird

Hi, I'm tring to rearrange the order of my email accounts in the left hand pane. The FAQ says sandwich icon -> account settings -> move them around in the desired order. This looks OK in the account settings list when I do that, but when I close it, the accounts order is as before, and this order shows up again when I re-open the account settings list. Is there any way to make this "stick"? Do I need to click some hidden Confirm button? Many thanks in advance!

Thunderbird version number: 148.0.1 Mail provider: Yahoo Client OS: Windows 10

The issue and steps I tried to resolve: On 1 Jan 2026 I switched from Outlook client on my Windows 10 PC to Thunderbird 146.0.1. I did not import any user data from Outlook but started with a clean install of TB for the new year. I use yahoo.com with POP3 as my email provider. Server Settings: Server Name "pop.mail.yahoo.com", port 995, SSL/TLS, OAuth2 Outgoing Server: Server Name "smtp.mail.yahoo.com", port 465, SSL/TLS, OAuth2

it all worked fine and I was very happy with the setup. Then from early to mid-February I was unable to use my computer. When I finally accessed Thunderbird again, it connected to Yahoo and showed that approximately 800 email messages would be downloaded and started downloading them. After downloading about 100 messages, Thunderbird timed out and I haven't been able to get it to work since.

I have read and followed or tried to follow these articles plus others that I may have forgotten about (not listed in any particular order) - OAuth2 Authentication for Yahoo, AOL and ATT | Thunderbird Help - including all the steps in Please check the following before asking for support - POP access settings and instructions for Yahoo Mail | Yahoo Help - Automatic Account Configuration | Thunderbird Help - Manual Account Configuration | Thunderbird Help - Thunderbird and Yahoo | Thunderbird Help - Send and receive messages in Thunderbird | Thunderbird Help - Can no longer get emails | Thunderbird Support Forum | Mozilla Support - Emails suddenly stopped downloading to Thunderbird 140.2.1esr | Thunderbird Support Forum - Get Messages | Thunderbird Support Forum | Mozilla Support - Cannot receive messages | Thunderbird Help - Problem with Thunderbird working with Yahoo Mail acccounts. | Thunderbird Support Forum

I have removed all messages from the Yahoo inbox and tried to find one or more messages that may be affecting the download. I don't know the best way to determine that.

I use Windows Defender for my antivirus. I don't see anything in Defender that blocks or scans email messages which would prevent downloads, although I could be wrong about that. if this might be the issue, please provide some guidance about how to check Defender.

I have uninstalled and re-installed Thunderbird. In the process I downloaded the setup file for Thunderbird Setup 148.0 and installed that version. It later auto-updated to 148.0.1. Before installation, I removed all external connections from my Yahoo account and completely removed Thunderbird from my PC, including the profile and profile.ini. When I reinstall and switch the account to POP3, Thunderbird captures the App password from Yahoo and connects just fine. But it still times out while attempting the first download of a message. The first several times it timed out, an error message was displayed but now it doesn't show anything. Except no messages are downloaded.

At this point, I don't know what else to try. Since I don't have much experience with Thunderbird, I don't know how to troubleshoot the process (logs to look at, etc.). I don't want to go back to Outlook but I need the email client to work and download messages. Any help would be much appreciated.

I have a lot of message filters that I've created over the years to filter out SPAM (as well as other more positive purposes like sorting mail to specific folders). I'd like to clean out the ones that are obsolete.

If I choose Tools > Message Filters, I get a display window on the screen with some of my message filters shown. But the reason it's "some" is that the top and bottom of the window are well off the screen display. I can double click on a Filter and edit its details and I can delete a filter by pressing the delete key. But I can't scroll through the list. Any filters that are out of range are not accessible.

Is this a bug I need to report? Or am I missing something?

Hello everyone. Thanks for all your support.

A few weeks ago I started noticing a pop up window was occurring every (approx) 5 minutes in Thunderbird suggesting that I run a compact to save 992MB. I assumed this would stop happening after a few weeks and a few updates from Mozilla, but the problem has remained, so I'm coming here to ask about it.

Context: I'm on Windows 11. I have multiple email accounts that my Thunderbird reaches out to. At least one of the accounts is retired so reaching out to its historical server fails.

Reproducing: For me to reproduce it, I run the compact. Quit Thunderbird. Start Thunderbird. It reports 992MB can be freed. I let it compact. The main inbox disappears and reappears. I wait a few seconds and restart Thunderbird. It again tells me that it can save 992MB by running a compact.

What I've tried: I've tried repair on the inbox folder of the account I'm typically in. That didn't help. I have many other folders across many accounts and not tried to repair any other folders. I've searched the Mozilla help system.

Logs: It seems to me that a compact is probably failing but I don't know where to look for evidence of the failure.

Hi,

I have three outlook.com email accounts configured. Two accounts open to show all subscribed folders. One account shows the account name only, but no folders.

Activity manager shows: "The current operation on 'Outbox' did not succeed. The mail server for account wasaga72@outlook.com responded: Command Error. 12"

Sometimes all folders show. Sometimes all folders show after a delay.

Tried: 1 deleting all .msf files. 2 removing and re-adding the account

My wife and I both have identical Laptops with the same three outlook.com accounts. Mine using version 148.0.1 (64-bit), hers using 140.8.0 esr (64-bit) both have the same problem.

Any help would be appreciated,

John

I am trying to add a Gmail account to Thunderbird. After clicking Continue from the configuration window, the system shows a 'Waiting for authorisation in login popup' window with a rotating circle, which eventually finishes and the window says 'Authentication error. Unable to log in at server. . . .'. As I understand it, the login popup window should be from Google asking me to confirm that it is OK for Thunderbird to connect to the Gmail server. It looks like that Google popup is being blocked. Does anyone have any suggestions as to how to get the Google permission popup to appear?

The Font list on my Thunderbird email appears to have been completely replaced after I updated my apple macOS to 26.3.1. I have lost familiar fonts like Bookman Old Style and Century Schoolbook but have a very long list of fonts headed Noto. How do I get the original list back?

I'm trying to list future events in the T-bird Calendar without including my numerous daily reminders (mostly when I'm supposed to take my meds). Is there a way to suppress their inclusion? Or is there a way to enter daily events as a separate class that won't show up in the standard future events list? Thank you.

The University of Minnesota makes me change my password for their email IMAP server every year. I use Thunderbird as my email client. I have not had problems in the past, but this time Thunderbird does not connect with the UofM server and I cannot update Thunderbird with my new password. When Thunderbird tries to connect, I get a Google "help" message about clearing my Chrome cache that does nothing. I deleted the old IMAP password in Thunderbird, but that did no good. Is there a way to update my credentials within Thunderbird?

I m using Linux Thunderbird 140.8.0esr Some emails have long unwrapped lines, how can i force a wrap boundary? e.g always wrap at 80 chrs or better yet, wrap to fit the viewing window

The password that was accepted to log into Thunderbird now isn't accepting that password anymore, and when I try to send my father email, it givesves error message. It says, "Sending message from michael.moon@austin.rr.com has failed". Now it doesn't give me a prompt to log into Thunderbird.

I have been trying to add new email accounts to Thunderbird and they never complete the process (I have several that configured correctly prior to this error). I have tried both automated methods (With and without HUB) and the manual method of adding an account. Here is what is happening. When I add an account, I can watch Thunderbird login to the account on the status line. The login goes correctly, however the "Done" tab is always greyed out, the process never completes. I then try configure the account manually at the same screen and I get "the server is already in use" message. I believe that Thunderbird is not correctly closing the connection, leading to the "server is already in use" message, but I am not sure how to correct the issue.

I am currently unable to login into my Thunderbird account. My email provider (Internet Lightspeed) told me to go into Tools>Settings > Privacy & Security > Certificates > Manage Certificates. In the Certificate Manager, go to the Servers tab, click Add Exception, enter the server address which is imap.lightspeed.ca. I did that and got the following response: This site provides valid, verified identification. There is no need to add an exception.

The Certificate Manager/Servers window now shows imap.lightspeed.ca:443 as the Server. Lightspeed says that is correct and need to contact Mozilla Thunderbird. Thunderbird updates are current. Any suggestions? Patrick

When I send a mail with FileLink, I get the message: "The message could not be sent. An error occurred while sending the email. The server responded with: “Spam message rejected.” Please check the message and try again." (actually, in French: "L’envoi du message a échoué. Une erreur est survenue lors de l’envoi de l’e-mail. Le serveur a répondu : Spam message rejected. Veuillez vérifier le message et essayer à nouveau.")

I made different tests:

• change email source (so, change SMTP server): it worked - but I do not want to change the standard SMTP server of the initial email address
• after the first error, the attached file, which is a shortcut to the big file, can be suppressed, and not the link in the body of the message ; sending the message is accepted

So, I suspect the spam filter to refuse the "attached shortcut".

The question: Is there a way to configure the FileLink feature so that it does not attach a file, but just add the link the body of the message?' Or are there other neat workarounds?'

Hi there, it seems I'm suffering from the same problems as others in several countries. I have also not been able to access my gmx.com account via Thunderbird for about a week now. I live in Belgium and use a Proton VPN, in case this is relevant. I can't find how to delete cookies in history, nor any other potential solutions to the problem. Any help offered is greatly appreciated! Best, Doreen

hello, i cannot seem to find a solution online, hopefully someone can help.

i often receive emails with images attached, and most of the time people don't resize their images. you can imagine over time this all adds up in the email storage folder total size.

i dont always need to keep a 6mb image version, it can be reduced after i am done.

i would like a method to resize the received emails image attachment, to at least still have a smaller copy for refence, but not end up with a huge thunderbird email account profile (in the email received not externally saved)

preferably a one click solution, or even a routine i can run on the file system, etc. or some way to edit the received email and its attachment in program.

thanks

I have been using Thunderbird for a fairly long time and have several email accounts in it. Today, I noticed that one of my accounts seems to be filtering the messages for one type of message. When I login to the email account directly, I see all of the messages. I don't have any filters set - none of the filter buttons are on, there is no filter in the filter text box and there are no filters in Tools->Message Filters.

ThB & cPanel filters (a) don't catch all SPAM and (b) send legitimate mail to the Junk folder. Together, the 2 problems cause a large amount of work. Because of (b), I must regularly go through the Junk folder. Because of (a), the Junk folder contains a huge number of messages. (a) Messages from serial spammers trying to spoof Costco, Marriott, AAA, Blue Cross, etc. that I have flagged as SPAM dozens of times IN ALL THEIR VARIATIONS, still appear both in the Junk folder and in the Inbox (including messages with the red SPAM marker turned on, which to remove from the Inbox I must first click to mark them as non-S{AM, then click again to mark them as SPAM). (b) Messages from senders who have sent hundreds of messages before that have gotten through and who are in my contacts list regularly and in significant numbers end up in the Junk folder. I tried to set up filters in Spam Assassin. They made no difference. I tried to set up e-mail filters in cPanel, which entirely removed messages before they even reached ThB. These were quite effective, but although I created them very carefully using regex to capture every variation of COSTCO spelled with Os and 9s, etc., they also ended up removing legitimate messages (and none of my senders mentions AAA or BlueCross in their messages). I really have no clue how to proceed. None of the advice that AI or ISP support provided helped. Thank you for taking the time.

Thunderbird causes my machine to 'hang' from time to time, often for up to a second and usually a number of times in quick succession on each ocasion. Sometimes this happens frequently - say every 5 or 10 minutes - sometimes only after an hour or more since the past occurrance. My machine hangs completely - nothing will work, mouse, keyboard, sound, other apps etc. If I happen to be typing (into any app - including Thunderbird - when this happens, input ceases, the cursor freezes and - if the problem persists for a second or two, Windows reports "[app] is not responding" I cannot be certain, but I believe the problem occurs whilst messages are being retrieved.

This is a very serious problem as it means that I can never leave TB running as the problems it causes are not acceptable. This means I cannot deal with incoming messages without periodically re-starting TB - which is an utter PIA.

I am running Win 11 Professional on a 2-year old machine with 64 Gb of memory. I have run TB in Troubleshoot mode, I have confirmed that the problem occurs regardless or whatever other apps are running (or none) and I have proven conclusively that no other app causes any kind of similar problem.

Looking forward yto hearing if others have had the same issue and what can be done about it.