Thunderbird コミュニティフォーラム

I recently set up Thunderbird for Windows as a troubleshooting step for my Yahoo Mail account which has been generating an incessant number of authentication pop-ups in Microsoft Outlook (Classic) for Windows. I had been using New Outlook for many months before switching to Classic Outlook a couple of weeks ago. With New Outlook, there had been no authentication issues nor pop-ups appearing. I have been using the OAuth authentication, not app passwords, in all cases.

Setup within Thunderbird was relatively easy and the OAuth authentication went through without issues. The account has synchronized and seems to be continuing to do so as I read, delete, and send messages.

However, when I went in to the Activity Manager, I'm seeing a number of errors, appearing every 10-15 minutes or so. They read as follows:

• Alert from account xxx@yahoo.com: AUTHENTICATE Server error - Please try again later

• The current operation on 'Inbox' did not succeed. The mail server for account xxx@yahoo.com responded: UID FETCH completed.

• The current operation on 'Inbox' did not succeed. The mail server for account xxx@yahoo.com responded: p.

Can anyone help me understand what they mean? It would help me stabilize Thunderbird and might give some clues as to what is happening in Outlook Classic for me. It would seem some have authentication issues with Yahoo on different platforms while the service works perfectly fine for others. I would like to move away from Yahoo as I find it finicky with a number of its features, but I'm a long-term user (25+ years) and don't see that being a practical solution at the moment.

Thanks!

My email used to put all my new emails at the top of the inbox. But recently it has started putting them in between the emails already in my inbox. How can I get my inbox to load my new emails at the top of the inbox?

I need to increase the font size of the display. It is about 8 point. I cannot find an article that says how to increase the display when I first open Thunderbird. I can increase the font form the actual message or replies.

Meine Festplatte ging kaputt. Auf der neuen Festplatte können meine in den dortigen lokalen Ordnern abgespeicherten emails nicht mehr gelesen werden. Ich weiß, dass diese noch irgendwo vorhanden sind. Wie komme ich wieder an diese?

I had to change my Google password and I cannot get to my mail. I tried to uninstall/reinstall Thunderbird with no joy. When I try to open Thunderbird, Google responds: "The server cannot process the request because it is malformed. It should not be retried. That is all we know."

An email displayed in dark mode modifies the formatting of the email. For example I received an email from Zillow. If in dark mode the images are cropped but in normal/white mode email is normal and I can see the whole imaged.

I am using Thunderbird 158.0 (64-bit) on Windows 11 and cannot connect a newly created Outlook.com email account.

The account works correctly through Outlook.com webmail, but Thunderbird consistently reports:

"Authentication error — Unable to log in at server. Probably wrong configuration, username or password."

I have spent considerable time troubleshooting this problem and have already completed the following checks:

Confirmed that IMAP access is enabled in Outlook.com.

Verified incoming IMAP settings:

Server: outlook.office365.com

Port: 993

Security: SSL/TLS

Authentication: OAuth2

Verified outgoing SMTP settings:

Server: smtp-mail.outlook.com

Port: 587

Security: STARTTLS

Authentication: OAuth2

Confirmed both usernames are my full new Outlook.com email address.

Confirmed that Microsoft lists "Mozilla Thunderbird" as an authorised application, with permission to read, write and send email.

Tested network connectivity using Windows PowerShell. Test-NetConnection outlook.office365.com -Port 993 returned TcpTestSucceeded : True.

Created a completely new Thunderbird profile containing only this Outlook.com account. The same authentication error occurred.

Tested Thunderbird Troubleshoot Mode without success.

Confirmed cookies are enabled and Windows is not using a manually configured proxy.

Removed saved OAuth2 credentials and retried authentication, without success.

Tested both external-browser and internal-browser OAuth2 authentication using mailnews.oauth.useExternalBrowser. Neither worked, and I restored the original value of true.

During an earlier attempt, the Microsoft authentication process displayed the error 127.0.0.1 refused to connect.

Microsoft's authorised applications page confirms Thunderbird has the necessary permissions, but Thunderbird still cannot authenticate. I have not successfully been prompted to enter my new Outlook.com account password through Thunderbird.

My existing Hotmail account works in Thunderbird.

Could this be a known Thunderbird 158 OAuth2 problem affecting newly created Outlook.com accounts?

As the usual configuration, password, permissions and network checks have already been completed, I would appreciate advice on identifying the underlying authentication failure rather than repeating those steps.

Thank you for your assistance.

I use T-bird for my email accounts and have for decades. This includes accessing an enterprize version (work) as well as basic personal gmails and even another non-google web based email account. I'm an ardent fan. I recently had to reinstall on wiped/cleaned laptop (workplace IT situation). Since then, the 2-factor authorizations have been creating problems. Including: a pop-up whenever I open T-Bird on my laptop, requiring me to sign-in to a ghost Google account. This would be less of a problem if either:

1] the account in the pop-up window hadn't been disabled over a year ago, OR
2] I could change the account in the pop-up to one I still have (can't) 

3] PS: yes, my settings for my other google accounts are at SSL/TLS & OAuth2 (except for the one that requires 4]PPS: No, the ghost account is not listed as one of my 6 accounts in T-Bird, and it was deleted long before I had to re-install T-Bird on the newly wiped hard drive... 5] I cannot log into the ghost account and disable the 'sign-in with google' option, because it's disabled/shuttered/NoLongerLive. 6] Yes, I've cleared the cache. Multiple times. 7] Yes, I've updated to the most recent T-Bird (158.0)

The popup only happens with T-bird, and only on one laptop (ot others I use, which also have T-Bird). I really don't think this is a problem at the google end, much as I'd be happy to blame them.

• MY QUESTION*: Where would T-bird, supposedly a fresh install on a recently wiped drive, be pulling the ghost of a previous account as part of the 2-factor authentifications, from? Would it be in the Config Editor? Bottom line: How can I make it stop?

I've received the following message the last few days when I send an email with Thunderbird:

Your message was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. (I am sure neither of those errors apply.)

It then gave me the option to "save" (I didn't get the exact wording before I clicked on "save") and I don't see it anywhere. This was a very important email and I need to find it.

Hello, I have been trying to use Thunderbird for the past 3 days, but my attempts to set up an account fail every single time—even though my email address and password are correct.

What do you recommend I do? Thank you.

mguinet EmgNettoyage [redacted phone# from community support forum]

Have got a replacement computer, and downloaded the latest TBird (having used it with AOL) for years). Following initial set up procedure, TB detects correct settings for AOL and the "enter password" page opens from AOL succcessfully for authorisation. AOL requires 2 factor authorisation, and I use a phone code for this.

However the speed at which the code arrives from AOL has always varied quite a bit, and today it is taking almost a minute so the TB set up screen is timing out long before the code arrives. Cant go on retrying as I will get locked out of the account. No point in going for manual set up as the auto settings are correct, so the same problem is going to occur. I have three AOL e-mail addresses to set up! Is there a workaround of some sort for this - its terribly frustrating and the set up screen "connect your e-mail settings" timeout period does seem quite short if you have to wait for a 2FA phone code or e-mail code - any delay in the arrival of which is completely ouside your control . Dave

T'bird 153.5.0 esr on Windows 11 25H2.

Main Inbox folder (using POP3) is about 13 GB

Thunderbird crashes and/or becomes unresponsive on opening. This happens in both normal mode and safe mode.

Typically, there first is this error message: "The account is being processed. Please wait until processing is complete to get messages." I click OK on that message, and after a while, Tbird becomes "unresponsive."

I've tried deleting Inbox.msf, but that didn't help.

Sometimes, I get this error: "Unable to write to the mailbox. Please ensure the file system allows you write privileges and you have enough disk space to copy the mailbox." There have been no changes in Windows accounts, so it seems highly unlikely that there is a permission issue.

The hard drive on this system has about 233 GB free.

Where do I go from here?

I have multiple email accounts on Thunderbird (on MX Linux)... att.net, gmail.com and aol.com

While traveling without my computer, i had to reset my aol password on my iphone.

Now that I'm back at my desk, and being unable to find how to change the aol password on Thunderbird, I deleted the AOL imap account and have tried much of today to add a new AOL account.

In the past, I could create an 'app password' within AOL (browser) and use that password in Thunderbird... but that is no longer working.

Any guidance/suggestions?

I am running the latest Thunderbird version 140.17.0esr (64-bit) available in my MX Linux.

Hello:

In Thunderbird, a double-click no longer opened a highlighted email in a new tab as the 'Classic' setup used to do.

I ended up in system setting for the mouse/touchpad. The 'double click' slider had NO value set to it. The 'double click' test did not work.

I set 'a' value to the slider. Viola! The double click test works. Thunderbird works as it used to, as it has.

SOMEthing put a null value in the system settings. I had been nowhere around that function setting.

I have been using Thunderbird for years. My current version is 158.0 (32-bit). In recent months Thunderbird has become increasingly weird and annoying. These problems have occurred individually, not all at once, and each persists--that is, they are all and always present.

1. T'bird's counts of messages in folders is always much higher than the actual counts. 2. I tag messages with color, but T'bird deletes the color tags within a day. 3. Clicking a message doesn't change the message from Unread to Read--that is, the title stays bold. I can change the read/unread indication by clicking the button, but the change doesn't happen automatically. 4. If I drag a message to my wife's T'bird inbox, the act removes the message from my T'bird inbox, but it doesn't always remove it from the inbox at the Server. 5. Deleting a message from my T'bird inbox often also deletes the message just above it. This is the oldest problem, and when it first occurred I found that if I closed and immediately reopened T'bird the message would reappear in my T'bird inbox. Now it does not, although the message might still be in my inbox at the Server. 6. While I am reading a message, the list of messages often pops up to the top (oldest) message. The message I was reading doesn't disappear or otherwise change, but I have to scroll back down to it and click it again in order to delete it or move it to another folder.

These problems are more than annoying. Can anybody help?

I can't match field names in Thunderbird 158.0 (64-bit) on Win 11 when importing addresses from Google .csv file. The dropdowns to pick TB fields to match the .csv header fields only show one item, usually (and obviously) the wrong one . For example, Last Name is not matched with Last Name and cannot be changed.

Screenshot: https://www.dropbox.com/scl/fi/8usw6dgucrkd71l9m4hk3/ImportAddressBookMatchFieldNames.png?rlkey=216i5dyax4it6sz4909b7ujfy&dl=0

I was referred here from Thunderbird Bugzilla report 2081665.

We are experiencing a recurring problem with Thunderbird 153 on several Windows workstations in a business environment.

The important point is that the problem also occurs with completely new Thunderbird profiles created from scratch. It is not limited to migrated or old profiles.

On one workstation this has already happened to three separate Thunderbird profiles.

Typical sequence:

1. Thunderbird 153 is installed. 2. A completely new profile is created. 3. Mail accounts are configured manually. 4. Everything initially works normally. 5. After some time the profile begins to malfunction. 6. Thunderbird Settings no longer open/respond. 7. The address books still exist, but address autocomplete when composing a new message stops working. 8. Creating another new profile temporarily fixes the problem, but the same behavior can return later.

Troubleshooting already performed:

- Troubleshoot Mode - extensions disabled - tested without the existing prefs.js - rebuilt Thunderbird caches and profile UI state - recreated indexes/databases - completely removed Thunderbird from Program Files, AppData\Roaming and AppData\Local - clean Thunderbird installation - clean profile created from scratch - Thunderbird executable and profile paths added to Kaspersky Endpoint Security trusted applications/exclusions

Removing prefs.js from an already affected profile did not restore the Settings window.

A clean test profile initially works correctly.

We have also encountered this behavior on other workstations. Some users have more than 100 message filters and many folders, so rebuilding profiles repeatedly causes significant administrative work.

Several affected computers had Windows user accounts renamed in the past.

We also experienced a separate issue where the Attach File dialog stopped appearing while drag-and-drop still worked. Bugzilla identified this as the already known Bug 2077590, so I consider that a separate issue.

For comparison, after completely cleaning Thunderbird from an affected workstation and installing Thunderbird 115.3.1 with a clean profile, the same workstation currently works normally.

Because freshly created Thunderbird 153 profiles can later develop the same problem again, simply recreating the profile does not appear to be a permanent solution.

Environment:

- Windows workstations - Thunderbird 153 ESR - Kaspersky Endpoint Security - multiple IMAP accounts - business environment

What diagnostic information should I collect from the next affected profile before replacing it?

I can provide:

- Thunderbird Troubleshooting Information - Error Console output - profile file names/sizes/timestamps - Windows Event Viewer logs - sanitized prefs.js - comparison with a working fresh profile

Bugzilla report: 2081665 Known separate attachment bug: 2077590