Thunderbird Community Forum

I selected the "To save disk space, do not download:" checkbox while I was traveling with restricted internet. I've deselected the checkbox now, but the downloads are still restricted. Apparently deselecting did not unset a flag in the settings? Does anyone know how to edit the settings for each account to do this manually?

I'm a retired Desktop Support tech more familiar with Outlook, still very new to Thunderbird. I enjoy supporting family & friends and often email urls for various reasons. What setting do I need to tweak in Thunderbird to get long urls that I paste into emails to send to wrap within the composed email?

I noticed that when replying to messages that have a reply-to header, my own message is not included in the thread with the first message. There is, however, a small "reply" icon next to the email in the list. Is there a setting I need to toggle, or should I report a bug?

As long as I've used TB, which is many years now, I've had no complaints. I have absolutely no desire to change to a different program.

That being said, I'm at wits' end with the recent issue of Notification Sound Alerts (NSA) upon delivery of a new message. Simply stated, beginning about 6 or 8 months ago, the NSA seem to simply work whenever they want to. I can go a month or two at a time and receive the NSA, and then suddenly one day, NSA will stop functioning on its own. This "pause," we'll call it, will last 4 or 5 months, then then suddenly begin to work again.

I have attempted every imaginable fix as recommended in this forum. There's no need to list them all, because I've made every suggested adjustment that's been recommended. But there's no rhyme or reason to why the NSA will work as programed for a period, and then decide on its own to stop working.

I don't know if this is a glitch in TB that is simply beyond my feeble attempts to rectify, or if any other TB users are experiencing the same issue. I have even gone so far as to attempt to find an Add-On that will supplement the NSA. However, none that I have uncovered, particularly those suggested in this Forum, seem to be compatible with either the version of TB or Windows 10. I understand that Win 10 is not longer supported in the forum, but please! I do not want to migrate years of email files to another program. I want to use TB but simply need to be "Alerted" when new messages hit the Inbox.

Any assistance or suggestions (except those basic adjustments that proliferate the forum, i.e insure the sound mixer is not muted, etc, etc) would be greatly appreciated and thanks for listening.

Apple ID and password are saved in Thunderbird but every time I open Thunderbird it now askd for apple ID & password. Was working OK originally about 3 months ago but itn the last 2-3 weeks has started to ask for this info, If I type it in with my apple ID and the apple specific password then the calendar opens. It I say save password the next time I open Thunderbird it asks for Apple ID and password. and so on and so on.....

Using Thunderbird b150, but have tried -esr and regular TB. New install of Win11 26200.8037. Up to date Firefox. Have been trying for a week for Thunderbird to authenticate my Outlook account. Worked with Copilot. Finally found a TB setting, network.proxy.allow_hijacking_localhost, that was set to FALSE. Set it to TRUE and Outlook account authenticated. Able to finally send mail. This was last night. This morning: Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.office365.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again. No changed to any programs. Have deleted Outlook saved password. Thunderbird NEVER offers to get password/authenticate. I am truly and sincerely frustrated.

If someone can help me, would sincerely appreciate.

Using Thunderbird to check emails and the calendar for an Infomaniak account: The account was active and working properly. After switching this account to 2FA, Thunderbird consistently requested a username and password during synchronization. After some research, the solution is as follows: you need to create a new app password with Infomaniak, then ensure that Thunderbird saves the password and that the “Require device authentication...” option is disabled. Would it be possible to provide a complete step-by-step guide for next time? Thank you.

Either yesterday or today, I was prompted within Mozlla Thunderbird to enter my password before I could download e-mail sent to my main business e-mail address, [edited]@suddenlink.net. I did that, expecting to see my latest mail haul from that account downloaded to my inbox. I was therefore unpleasantly surprised to see that my e-mail login failed, with the message:

"Login to server imap.suddenlink.net with username [edited] failed."

Yet, I was able to log into my webmail account for [edited] online with that same login and password.

I then tried updating the password, thinking that the Optimum server was requiring that I do that as a security measure for the entire network. After restarting the system, I logged back into Thunderbird and tried to view my [edited]@suddenlink.net e-mail.

Even after doing all that, I failed to gain access to my latest e-mail deliveries to [edited]@suddenlink.net.

Can anyone help me to restore my access to my e-mail account [edited]@suddenlink.net in Mozilla Thunderbird? I can view or send the e-mail in my webmail account, or on my Smartphone. However, those methods are considerably less convenient than relying on mail delivery to or from Thunderbird.

This sort of setback has happened before. Whenever it happened it was difficult to solve. Attached is a screenshot of the Thunderbird response to my attempted server login.

An IRS form 4506-B PDF has to filled out and sent with adobe reader, if you use a browser it disables funtions in adobe acrobate reader that allow you to send the form. Thunderbird works find to send regular emails. It isnt working when I click on the "submit form" buttton at bottom of the 4506-B forms page. I ran Thunderbird in troubleshoot mode and turned off all AVG protection includeing VPN and it still wont work. I tried with my aol and gmail accounts.

'FROM IRS SITE':How To Submit Submit Form 4506-B via email by completing the form then clicking the “Submit Form” button at the bottom of the page. Adobe Reader. We use Adobe Acrobat PDF files to provide electronic access to our forms and publications. You will need to have the Adobe Reader software installed to submit this form. We recommend using the most recent version of Adobe Reader - available free from Adobe's website. When submitting, saving, or printing a file, be sure to use the functionality of Adobe Reader rather than your web browser

メールを読み込むと「アカウントエラー　メールボックスにメールを書き込めませんでした。ファイルシステムに書き込み権限があるか、ディスクに十分な空き容量があるか確認してください」と表示される。 同アプリで他のメールアカウントでは表示されず、取り込みについても問題はないため、容量に問題はないと思われる。 また別の端末では正しくメールを取り込んでいる。

対処方法を教えてください。

This just started 4 or 5 days ago ( 2026.1.23 ish). I did not update TB nor make any changes to the account in question (that I'm aware of). The errors show up every few minutes, with a 'beep' sound and notification pop-up showing up each time - is very annoying.

I was running v145 when it started. I saw there was an update to 147 and installed that; same issue. I restarted TB into Troubleshooting mode and am still getting the error.

This is running on MacOS 15.7.3. Hardware is MacMini (2024) with Apple M4 chip.

Generally I still seem able to received & send emails.

I opened Activity Manager and Error Console. Error console doesn't seem to have much (using 'Multiprocess', with Errors, Warnings, Logs, Debug enabled). Activity manager shows things such as:

<my account name>

   Connection to server outlook.office365.com was interrupted.    09:49
   Failed to connect to server outlook.office365.com.    09:52
   Authentication failure while connecting to server outlook.office365.com.    09:58
   Authentication failure while connecting to server outlook.office365.com.    10:03
   Connection to server outlook.office365.com was interrupted.    10:10
   Connection to server outlook.office365.com was interrupted.    10:14
   Connection to server outlook.office365.com was interrupted.    10:20

There was an error or log entry that I was able to find a few days ago that made me think it was Calendar related, but now I'm not finding that message.

I am running Fedora 42 KDE spin ("plasma"). The "Discover Software Center" app offers Thunderbird as both a regular and a flatpak install, and I somewhat arbitrarily chose flatpak.

I am dealing with several legacy email accounts that have 20 years of messages, so I need to control where the profile was created, so immediately after installing I ran with -P to create a profile and specified a path name of /lore/jeff/thunderbird. /lore is the mountpoint of /dev/sda2 and it is in my /etc/fstab. /lore/jeff previously existed because that's where I put my Dropbox folder.

Every time I shut down TB and restart it later it always fails because lock and .parentlock are never deleted. Until now, I just dealt with it by deleting the files in bash, but today I wanted to make sure that TB always starts offline and decided that user.js would be the absolute safest way to guarantee that, so I pulled up profiles.ini to get a list of all profile paths to make sure that I put a copy of user.js in each and every one whether it's in use or not. What I discovered is that the profile I created does NOT have a Path of /lore/jeff/thunderbird but instead /run/user/1000/doc/e1a4ab74/thunderbird and not only that but at the very bottom of the file are these three lines [InstallBD520B11F73A6B64] Default=/run/user/1000/doc/e1a4ab74/thunderbird Locked=1

The interesting thing is that when I put user.js into the /run/user... path and then looked at /lore/jeff/thunderbird to check on lock and .parentlock, I see that there is magically a copy of user.js there. I'm not exactly sure what is going on because when I do `ls -ldi` on the two files, their inode numbers are vastly different. I don't know enough about how flatpak operates internally, but my gut tells me it has something to do with it, and my question that I'm finally getting around to asking is if I edit the profiles.ini file to use /lore/jeff/thunderbird in an attempt to get TB to correctly clean up the lock files, is that going to cause a problem because of whatever flatpak is doing? And should I complain to flatpak about it?

Thanks for reading :-)

I HAVE CHANGED NOTHING & CAN LOG ON SERVER WHILE IN THUNDERBIRD SETTINGS, BUT WHEN ASKING FOR NEW MAIL AM TOLD "LOGIN TO SERVER WITH (MY EMAIL) FAILED". THIS IS SUDDEN SINCE UPDATING TO LATEST THUNDERBIRD. LOGGING ON IN FIREFOX WITH SAME INFO IS FINE! THANKS

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.

When I attempt to access the Add-Ons service through Thunderbird, it brings me to an HTML page (https://addons.thunderbird.net/en-US/thunderbird/search/?q=lastpass&appver=147.0.1&platform=Linux) reading

> addons.thunderbird.net > Performing security verification > > This website uses a security service to protect against malicious bots. This page is displayed while the > website verifies you are not a bot.

with the following footer: > Ray ID: 9d07fae58cabaefb > Performance and Security by Cloudflare

It will attempt to connect to Cloudflare to verify a Captcha, but the Captcha itself never renders, and after a period adds the following to the text:

> Why is this verification taking longer? >This verification can take longer due to an older computer or a slow internet connection. > What to do next: > # Wait briefly. Refreshing the page will restart the security verification and may take longer. > # If the verification still does not complete, refresh this page. > # If you are still stuck on this page after a page refresh, refer to Cloudflare’s troubleshooting documentation for more help.

After another period it then cycles the verification page. This continues as long as the tab remains open.

Opening the link listed above in Firefox opens the Addons page as expected.

Similar Captcha pages open on launch, as well as when accessing support or attempting to create a Matrix chat account.

There is a potentially related issue in that images and some icons are not rendered. I will make a separate post asking for help with that if it is not related, but it seemed relevant to mention.

The problem has existed for a long time, and I have checked existing responses without finding a solution, but I didn't get around to asking about it until now.

I am using Thunderbird v. 147.0.1 (64-bit) for Linux with no extensions installed), connected via AT&T broadband service with no proxy set, running under Manjaro 26.0, kernel 6.18.8-1, with the XFCE desktop environment (that last is only mentioned for the sake of completeness). I am using GUFW for my firewall, but the problem persists when the firewall is disabled (something I do not wish to do regularly in any case).

Thunderbird won't work anymore. Microsoft message requiring that I add another email address in case I can't access email account. I don't want to use other email address, but there is no other option to this message.

Thunderbird stopped syncing with my GMX email accounts (I have several) a couple of days ago. It keeps reporting that the attempted connection has timed out. I haven't changed any settings on either Thunderbird nor GMX. Any idea why and how to fix it?

アーカイブしたメールの保存先のフォルダーを切り替えました。 新フォルダーと旧フォルダーのどちらも，アイコンがボックス型となっております。 旧フォルダーは通常のフォルダーアイコンに戻したいです。 どうすればいいでしょうか。

なお，GmailからIMAPで同期しています。

I’ve changed the folder where archived emails are saved. Both the new folder and the old folder now have box-shaped icons. I’d like to revert the old folder to the standard folder icon. How can I do that?

Note: I’m syncing via IMAP from Gmail.