Thunderbird Community Forum

Running Thunderbird 140.6.0esr in Windows 11. This afternoon I found that one of my three accounts no longer shows up in the folder pane, though it still appears normally in the account settings tab. I can still send mail from it, but can't receive any. The other two accounts appear in the folder pane as usual and can send and receive normally.

Any help getting the account back into the folder pane would be appreciated. -- tralfaz

I have used Thunderbird for many years and and have loved it. However, recently my "Local Folders Inbox" have been extremely slow (deleting emails, reviewing an email, etc.). I have tried every suggestion that I have found without any change: reducing emails in the folder (down to about 75 remaining), compacting and repairing the folder, deleting and rebuilding all of the msf files and global database, disabling all addons, empty trash and junk, clear the cache, disable hardware acceleration, exclusion in antivirus, etc. It has become very frustrating. Any suggestions would be greatly appreciated.

For the last two days, every time I start Thunderbird, a pop-up requests me to log in into Google Calendar. I have followed what little advice I can find:

• Unsubscribed/deleted all calendars
• Deleted all Gmail Accounts
• Deleted all saved passwords, and re-entered them only for my current email accounts.

How do I get rid of this irritating and unnecessary pop-up? I have updated to v128.14 but the problem persists.

Thanks in advance.

John

On more than one occasion I get the following message after sending an email. I'm told that a copy of my outgoing email has not been saved in the sent box:

"access errors. You can retry or save the message locally to Local Folders/Sent-aidan@clockwork1.plus.com."

Is there any way that I can overcome this issue and have a copy saved automatically, please?

I receive the following error message: Not enough disk space to download new messages. Try deleting old mail, emptying the Trash, and compacting your mail folders and then try again.

I get the message when I want to download new emails. The suggestions to fix the problem DO NOT WORK. I cannot compact, the Trash is empty and I know there is GB's of space on my C: drive, which contains all Windows software. What to do?

I am using Protonmail with Thunderbird. In my Protonmail web account there is nothing in ANY folder but the very few I am currently keeping, including All Mail. The same folders and messages are represented in Thunderbird folders. However, in C:\Users\username\AppData\Roaming\Thunderbird\Profiles\wiu0xbpg.default-release\ImapMail\127.0.0.1, the All Mail folder contains all previous messages, including deleted messages, are still present. When I delete a message, I want it deleted. As can be seen in the attached image, All Mail is very large whereas all other folders are very small. 1. How can this be cleaned up? 2. How can this be prevented in the future? Thanks for any direction in this matter.

j'ai ajouté à thunderbird mon compte de messagerie infomaniak . l'intégration s'est faite correctement, mais je ne peux pas envoyer de mail à partir de thunderbird infomaniak sauf si je remplace le serveur sortant mail.infomaniak.com par smtp.gmail.com. quelqu'un sait ce qu'il se passe?

I can send but not received emails from my several accounts. I know there's email on some, as I can see and read them with Mailwasher.

I have noticed previous posts here with the same problem, but I haven't seen a viable solution. (I'm on a new computer since last week.)

Running Thunderbird 140.8.0esr 64bit Windows 11 Home, v25H2 932GB storage 32GB ram i7-13700k

Recently, I've started getting the following message every time I launch Thunderbird: "The certificate for imap.googlemail.com does not come from a trusted source."

Digging into details I get: "you are about to override how Thunderbird identifies this site" "Location: imap.googlemail.com:993" "This site attempts to identify itself with invalid information" "Unknown Identity. The certificate is not trusted because it hasn't been verified as issued by a trusted authority using a secure signature."

Digging deeper into the certificate I find the issuer is Bitdefender who I use for antivirus and VPN. However, the VPN shows no effect when enabled or disabled. The validity period is 2 Feb 2026 to 27 Apr 2026

l can get email, but cant send it. Is Bitdefender at fault?

I'm stumped. What should I do???

New computer, trying to install Thunderbird. "Download" created a file called Unconfirmed 750544.crdownload which isn't executable and doesn't seem to do anything. How do I proceed to do an installation?

I am having trouble sending in email, i have gmail server (i am getting a time out error) i have the latest version of thunderbird i am receiving message ok, just cant send

I'm trying to switch from Thunderbird ESR (140.8.0esr) to release (148.0). Following the Mozilla support recommendation I'm running the 148.0 setup and trying to install it to the same directory. While doing so I'm asked to restart the computer. After doing so I'm required to restart setup but continuously asked to reboot the computer. is there a zip version of the installation? if not How to overcome the restart issue?

Thunderbird has been working OK. Now, despite PC restarts and so on I get the message "mail couldn't be sent, time out error for SMTP server. I have tried changing the SMTP settings from port 465 to port 587 but no difference. If I log in to my email provider (vodafon/uniymail) I can send mails no problem. The problem is with thunderbird not sending smtp. Tried turning firewall and antivirus off, no help. Internet connection is glassfibre, internet works OK.

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 am trying to install Thunderbird into a new computer with Windows 11. When I try to run, it goes to a configuration page but will not connect after finding my account. I have double-checked password, but it says "Unable to log in at server . . . ".

I have uninstalled and reinstalled new program, but get the same response each time. I want to install Thunderbird (and Firefox) and copy my profiles from my old computer to the new one. I am not able to do either. I have followed the online instructions for moving/migrating both, but neither work. Any suggestions?

Rad

Every time I open the new version the following comes up in a window. By agreeing, you’ll allow Thunderbird Mail to access: Yahoo Contacts read and write Yahoo Calendar read and write Yahoo Mail read and write

The Yahoo Contacts and Yahoo Mail I can understand, But, I don't want a Yahoo Calendar. Is it somehow possible to allow Contacts and Mail, but exclude Calendar?

I upgraded from windows 10 to 11 My son was able to recover my e-mail folders, but some large folders are missing and the remainder only have e-mails from 2019 or earlier. How do I recover those e-mails? I am no longer conversant with the current technology or terminology. I need simplistic instructions.