Thunderbird Community Forum

I want to access an Outlook.com email. It has 2-step verification. It also says I may be missing a domain name before the email. Not sure what that is. DomainName/myemailname@outlook.com.

For the last few days my Unified Inbox which is fed by three of my email accounts stopped displaying incoming emails in the Unified Inbox folder. I am running Thunderbird Desktop version 140.2.1esr | Released September 2, 2025 on a Win 11 PC. The incoming emails show up in their Thunderbird accounts OK in their own Thunderbird Inboxes but they no longer also show up in my Unified Inbox. I did not change any setttings that I know of but the Unified Inbox just stopper working properly.

I have gone to the Unified Inbox's Properties and deselected each individual inbox and then selected them and no change. I deleted the cach and no change. The Unifed Inbox is set to "Match all messages."

I am guessing it is a bug in the latest Thunderbird update but perhaps someone can offer a fix I have not tried yet. Thank you!

Updated to 148.0 this morning and now none of my google calendars are population the calendar. I am clueless as to why. Tried deleting them and re-adding them in - Not working. If this can't be fixed I am done with Thunderbird. Kind of sick of everything breaking with updates with no warnings.

A "send later" button came up one morning instead of the usual "send" button. When I clicked on the write button to see where the "send" button was, several choices came up but when I clicked on the "write" choice I lost the other choices and now can't get back to the original write button and still no "send" button appears anywhere on the menu. I can save messages to Draft but still can't actually send them. I can still receive emails, just can't send them! Help!

Updating my Address Book in Thunderbird v148. The darned thing does not permit two people to have the same email address or phone number - pain in the "A" to say the least !

Okay, I currently have two issues going on, both repercussions from transferring Thunderbird to my new computer. I'll limit this post to one issue!

My transfer to the new computer was not taking; followed instructions but no profiles were loading. I thought that perhaps this was due to my initial problematic installation of T-bird decades ago, where I eventually wound up with a choose-user-profile panel that worked fine with its default setting...so I lived with that easily (see image). Thinking that this was causing the inability to load profiles on the new machine, I tested whether I could delete the never-used profiles in that panel. After just one deletion, that resulted in the "Couldn't load XPCOM" error described here: https://support.mozilla.org/en-US/questions/1360766 Following the instructions on that page to do a repair installation (to the letter), starting T-bird now results in the attached "profile missing or inaccessible" message.

Please advise: Am I doomed?

Thanks for any honest advice. (yes, my Thunderbird installation is big: seven or eight addresses, many local folders, a large history and archives.)

Issue

Thunderbird fails to wrap long lines of HTML-formatted text that is wrapped in a <pre> tag. This behavior is consistent in both the email viewer when viewing received emails, as well as in the email composer when writing an email containing preformatted text.

What I tried

1. Make all settings of config editor that contain the word wrap as true 2. make a userContent.css stylesheet within the chrome directory within the profile directory.

Question

How do I post the offending HTML code (and the CSS file I tried) on this forum?

How do I force Thunderbird to wrap preformatted text?

Not sure how it happened but I've suddenly lost access to my Google calendar. On the bar on the left side of my calendar display screen there is a list of two calendars, Home and my email address, which I think is a Google calendar. Even though I check "Show all calendars" it does not show my email address calendar. And if I click on only to show my email address calendar it shows nothing at all. On my Pixel cell phone I can still see both the Home calendar and the Google calendar, so I guessing Thunderbird has just lost the link, although it shows a googleapi address when I click on properties. When I accept a Zoom calendar listing it has always and still shows up on the Home calendar. This seems most mysterious. Anyone have an idea of what I should do? Is there anyway I can rebuild the link to the Google calendar?

I've been using color settings in userChrome.css to set the colors for the threads and folder panes... I obtained these settings from a discussion in the Thunderbird Beta mailing list, back in 2023. Here are my current settings:

root {

 /* Force BG in unthemed folder */
 --foldertree-background: #A99B92 !important;
 /* Force BG in threads */
 --tree-view-bg: #A99B92 !important;
 /* Force black text in threads */
 --tree-view-color: #000 !important;

} /* Position Menu Bar above Unified Toolbar */

1. toolbar-menubar { order: -1 !important;}

However, after the most recent beta update, the tree-view settings are no longer working, and I'm stuck once again with the ghastly Bright White background... see the attached image; note that the foldertree setting is still working though...

What do I need to do, to get this code working again? or is this a bug in the current beta?

Hi, I just noticed that my computer has been infected by a trojan called "HEUR:Trojan.VBS.SAgent.gen", and I can't remove it via Kapersky...The trojan is found in the inbox file in Thunderbird. So it's not a file that I can remove (it's all code). Kapersky stated that these two files are the source of the Trojan (they are not found as an e-mail attachment in my inbox, it's all code in the inbox file in Thunderbird):

P000009384:Emirates_Marble-pdf.gz and P000009384:Emirates_Marble-pdf.vbs

So I'm simply wondering how I should go about to remove this trojan from my computer?

Source: https://threats.kaspersky.com/en/threat/HEUR:Trojan.VBS.SAgent.gen/

How can I get the "send" button back in my menu. I am not offline. I am receiving messages and can write and save messages to draft but there is no SEND button in my menu anywhere to enable me to send messages out.

Every time I start-up Thunderbird, a series of 2 pop-ups from Yahoo open up: [ Sign in using your Yahoo account ]. I close the pop-up and a 2nd one pops-up. I close it and say 10 or 15 mins they pop back up in the same series. It's very frustrating. I can't tell if it's Yahoo or a scam cookie. I notice the URL at the top of page and it's the same one every time and every day. The same URL shows: "https://login.yahoo.com/?src=thunderbird&client_id=dj0yJmk9NUtCTWFMNVpTaVJmJmQ9WVdrOVJ6UjVTa2xJTXpRbWNHbzlNQS0tJnM9Y29uc3VtZXJzZWNyZXQmeD0yYw--&crumb=uE2cxQuNxpE&login_hint= ..." <... it goes on for a few more lines. It's long. I went to Firefox and cleared all 'cache' and 'cookies' and they still pop-up in Thunderbird. Heck, they just popped up again while writing you! How do I stop this intrusion while using Thunderbird? Thanks, RonD

When signing in to Thunderbird to set up emails on new laptop can not get new computer to accept password and there is no where to change it. I have changed iy on the old computer several times does not help

I have for a while been getting popups that TBird is unable to write email to a mailbox.

'Unable to write the email to the mailbox. Make sure the email system allows you write privileges, and you have enough file space to copy the mailbox'.

I saw that at least one other person reported this, and the suggestions included:

1. Rebooting. Done, no effect. 2. Antivirus interference. I am using standard Windows antivirus. Have been using same for years without issue.

The problem does not appear to interfere with writing to mailboxes. Seems to be an erroneous popup only.