Fórum da Comunidade de Thunderbird

I have a professional email address and a gmail address configured correctly in thunderbird. I also have a number of google calendars configured in lightning using the built-in google calendar support (i.e., I am not using the old google calendar plugin). Until recently, when I received and accepted a calendar invitation sent to my professional email address, thunderbird would ask to which calendar I wanted to save the invite. I would select the calendar I wanted and it would be saved appropriately.

A week ago, I created a new google calendar and added it to thunderbird/lightning using the built-in google calendar support. Now, when I accept a calendar invitation, it automatically goes to the new calendar (which is generally not appropriate) without asking me to choose. Furthermore, I am unable to edit these calendar events to change the calendar they are associated with. I have checked the properties of both the new and old calendars and they look the same.

The only seeming solution I found was to make the new calendar read only and disassociate it from an email address, and then undo both those options. For the time being, this operation seems to have gotten back the option to select which calendar invites are saved to. But I would still like to know if this was the correct solution and better understand how thunderbird chooses to save event invitations.

Translation: My emails in Thunderbird suddenly disappeared.

They were over 10,000, but now they're down to only 7,800.

Why?

Original: Email saya di thunderbird tiba-tiba menghilang, awal nya sejumlah diatas 10 ribu , menjadi hanya 7800 ? kenapa

I forwarded an email from a different email client to my Thunderbird email client and when I opened that email the left margin was gone. I tried selecting the text and clicking on the right index and nothing happened.

This type thing has happened before when I forward something that comes to my TB account, but usually highlighting the text I add, and clicking on the right index, will move it over a bit.

I would like to know why this is happening, and if I can prevent it or solve it when it does. It looks so unprofessional and sloppy when there is no left margin.

Thanks, NM

Hi there! After transferring Thunderbird from my old to my new computer, the calender does not show any appointment. Even it I set a new one this is not shown. But all appointments still exist because if I search for them the are shown in a list. Is there anyone who has an idea what went wrong? Thank you for any help! Norbert from Berlin

Solo pochi vecchi messaggi erano presenti. Non riusciva a connettersi con Virgilio e mi chiedeva una nuova password. Non riuscivo a fare niente perché continuava a chiedere. Dovevo chiuderlo stavo pensando di usare outlook o gmail. Alle 1745 l ho riacceso e funzionava tutto. Sono riapparsi i vecchi messaggi ed arrivati quelli nuovi di oggi . Non so che dire

Continuation of my prior post: https://support.mozilla.org/en-US/questions/1516342

Thunderbird has a routine problem with being unable to log into various mail servers. I have four accounts and they all seem to share this problem.

Most recent update: I've tested this in Windows Safe Mode, and the problem has not appeared. Since I can't do any useful work in Safe Mode, it's hard to give it a thorough test, but so far so good. Also, I have removed AVG antivirus because it was redundant. I have seen no improvement since it was removed.

Can this problem be resolved?

I am setting up Thunderbird on a Win10 machine, and am having a lot of trouble adding accounts that I did not have on the two Win11 machines I have set the same accounts up on.

When adding my 2 GMail accounts, after clicking "Allow" on the OAuth popup the button would go grey the window would stay open and not close, and the account would not be added.

Changing the general.useragent.compatMode.firefox option to TRUE allowed me to progress and finally add those accounts.

I am now having the same trouble with my @hotmail.com account. When I add the account, the dark blue OAuth window pops up, but is completely empty, and there is nothing more I can do.

Things I have tried

• Reverting the above config change
• Checking that cookies and JavaScript are enabled
• Checking there is no saved password
• Used both the Account Hub and the default dialog, with the same effect.

Thanks in advance!

Thunderbird creates a draft of every email sent and stores it in the Draft folder. There should only be 1 draft for every email sent, and, it should be removed when the original email is sent. It seems that a draft is created every time I pause editing to look at something else on my Laptop. I get multiple drafts and they are never removed.

I am on Windows 11. Thunderbird ver: 148.0 (64-bit) Is there a setting I can change to make the draft work correctly?

I have 2 email accounts. One is a Yahoo.com address and the other is an AT&T.net address. I have always been able to access both email accounts in my Thunderbird application on my computer (Windows 11). All Yahoo emails have always gone to my Yahoo mailbox and all AT&T emails go to my AT&T mailbox on Thunderbird. However, something happened this morning (a Yahoo popup popped up when I clicked on Thunderbird and I stupidly clicked on accept) and now I'm getting duplicate emails in both accounts. After I clicked on accept on the Yahoo popup, all my emails from all folders (inbox, trash, spam) from the AT&T server downloaded into my Yahoo mailbox (in Thunderbird) and were deleted from my AT&T server from myyahoo.com (not on Thunderbird). Is there anyway to reverse this or change something in the Thunderbird application so I can go back to what it was previously (all Yahoo mail goes to my Yahoo.com mailbox and all AT&T mail goes to my AT&T.net mailbox in Thunderbird)?

I have contacted Yahoo and AT&T about this and after spending most of the day on the phone with each of them, they informed me that since my mail provider (Thunderbird) is a third party application, I would have to contact Thunderbird.

Please help!

Andrea

We tried installing Thunderbird on two PCs, both running Windows 11, but with unsatisfactory results. In July 2025, we bought a 15-inch HP PC running Windows 11. Thunderbird was installed, and the sending and receiving functions worked correctly with one domain name and three email addresses linked to that domain name. In January 2026, we bought a Lenovo T14 PC running Windows 11. We tried installing Thunderbird with the same domain name and three different email addresses linked to that domain name. Result: On the T14, it was impossible to install the third email address; only two addresses could receive and send messages correctly. Furthermore, the 15-inch HP PC now receives messages but can no longer send them; the connection is rejected by the server. Analysis: Apparently, there is an inability to coordinate the two PCs for Thunderbird. Question: Windows 11 had numerous updates between July 2025 and January 2026. Do both PCs need to have Thunderbird installed the same version of Windows 11 ?

Greetings all

I have been experiencing a strange issue with Thunderbird for the last three months, and it’s quite frustrating.

I use an IMAP/SMTP SSL setup (ports 993/465) with a local server that includes webmail but also supports IMAP and SMTP for email client management. Over the past three years, we never encountered any issues, but since upgrading Thunderbird, this problem has started occurring.

As you can see in the GIF, messages appear and disappear when I switch to another folder and then return. This affects not only the message counter but also the actual messages themselves. At first, I thought it might be an indexing issue, so I tried deleting the *.msf files and the global-messages-db.sqlite file within the account profile, but the result was always the same. I also increased the frequency of checking for new messages to every 10 minutes and changed the maximum number of server connections to cache from 1 to 20, but nothing changed.

No issues with webmail and with other email client.

Do you have any ideas or suggestions?

My 140 version of Thunderbird froze and I removed it and downloaded 140 afresh but it will not run. I just get a white screen and the settings button will not respond.

Hello. I recently upgraded from my older MacBook Pro (now factory reset and sold) to a new MacBook Air. I use Thunderbird as my email client and I have many folders that live within my Local Folders. When I transferred all the data from the older Mac to the new Mac via iCloud, and set up my new mail account (IMAP), the folders did not download into the program. I've tried using Subscribe but none of my pre-existing folders show up. Any assistance would be much appreciated. Thanks.

Hi all,

everytime I open Thunderbird I get a popup window from Yahoo finance with a server timeout message. I am unable to connect to get my emails through. I need to log on directly to Yahoo mail, which is a pain.

Hopefully someone can help me with this.

Find attached the popup image.

Regards

Hi all,

everytime I open Thunderbird I get a popup window from Yahoo finance with a server timeout message. I am unable to connect to get my emails through. I need to log on directly to Yahoo mail, which is a pain.

Hopefully someone can help me with this.

Find attached the popup image.

Regards

Hi all,

everytime I open Thunderbird I get a popup window from Yahoo finance with a server timeout message. I am unable to connect to get my emails through. I need to log on directly to Yahoo mail, which is a pain.

Hopefully someone can help me with this.

Find attached the popup image.

Regards