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I have installed Thunderbird as a first-time user on a new computer. I am able to receive emails but cannot send. I have the correct outgoing server settings and confirmed this with my ISP. They recommended that I check to see if my antivirus software is preventing from sending, so I uninstalled Firewall and it's still not sending. Can you assist in any other options that I should try to get emails to send?

Three weeks ago I attempted to migrate my TB profiles from a 2014 mini-mac to a 2024 mini-mac. I thought I did a better job of backing up my profile using CCC than I actually did. In the migration to the new Mac I lost all my subfolders from the last 20 years. Apple created a new Profile and 2 restoration Profiles on the new Sequoia based mini-mac. I wasn't familiar with these and panicked. I copied those files, took them back to the original mac and tried to follow Toad-Hall's method of restoring the subfolders recommended to bmack1 on 23/11/22. However, I failed to carry out the step of going up two levels in the path of the Library to copy the entire "Thunderbird" file and only copied the Largest restoration file. This in turn, "contaminated" the 2014 original Thunderbird mail profile and only an Inbox and Trash subfolder remained. Today, after 3 weeks of searching and reading the generous contributions of this community, I came across a post explaining that the "sbd files" will show the subfolder headings I created in the original sought after Profile. And I found it!!! My problem is I have re-read Toad-Hall's method of re-installing the original Profile and tried to carry that out to the letter by placing the old Profile within a Thunderbird folder and switching it with the current one. But it's still listed as the "Restoration qqg...file" and probably shouldn't be, but I don't want to go any further and risk losing it because I feel I almost have it. So any guidance would be greatly appreciated. Thank You.

When I start Mozilla it checks for new mail. It always says no new mail. When I click on get messages if there are any new ones I get them downloaded. Why doesn't the first check find new mail as it used to? Thanks

Two nights ago I uninstalled ExpressVPN from my system at the instruction of one of their "support" people. My computer immediately lost the ability to access half of the websites I tried to visit and Thunderbird wouldn't send or receive email. I rebooted and that fixed every issue, but since then, Thunderbird no longer checks for new messages for any of my accounts. If I manually instruct it to check, it downloads the messages with no problem. I don't use any add-ons, and I'm using the latest version on a Windows 11 PC. I have already tried deleting global-messages-db.sqlite, repairing each mail folder from within Thunderbird, clearing the cache, and running an install of the latest version. I have also tried changing the setting for each mail folder to alter the interval for message checks by a minute just to see if that would jog it, but no luck. I've looked at various other help threads for this and am out of ideas. Thanks in advance for any help.

I've got 2 PC, both on the same version of W11 Home and TB?

On my PC that was install in 2020, I can see on each folder and sub-folder unread mail, total mail, and size of that folder (see uploaded image). On my wife's PC, installed in March of this year, only can show the total mail and folder size?

I've Googled how to do that and of course there is no such steps I can do?

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To show the unread message count in Thunderbird's folder pane, click the three dots icon ( ...) at the top right of the folder pane header and select "Folder Pane Columns" or "Show total message count". Some versions may also allow you to enable this view by right-clicking on the folder pane header and selecting "Folder Pane Columns," then choosing to show "Total" and "Unread".

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Right off the bat, no "Folder Pane Columns"???

I suspect somehow this was removed from TB, so new installs this year can't get to it?

I can't even get to that on my PC from 2020 to turn them off?

Is/was there another way? Doesn't seem I have an ADD-ON to do that and I can't locate one that would do it?

Is there an answer to this or is this just the way it is (not)?

Hi, I'm trying to help a friend to transfer Thunderbird to a new PC. The old PC is running Windows 10 and I have updated the Thunderbird version prior to attempted transfer. The new PC is running Windows 11. I have followed all the online instructions regarding moving profiles from one PC to another. He has two email addresses in Thunderbird, one being gmail. He has also created a number of folders into which he has neatly saved incoming emails. Each time I copy the existing profile (over 10gb) and transfer this to the new PC as per instructions, there are missing folders which don't appear to have been transferred successfully. All his emails appear to be there as well as his address book but there are several missing folders containing important emails. His created folders are in alphabetical order but the only ones transferred successfully are the ones beginning A to C. All the rest of his folders D onwards have not appeared. I'm finding this very frustrating and would appreciate any help and support. I'm not too tech savvy but can usually overcome issues like this. Should I try the export/import route to transfer all his emails and folders to the new PC or is there something else "profile related" that I could try. Thankyou very much.

This is a new Fedora-42 desktop, upgraded (dnf upgrade) today. I installed Thunderbird today (dnf install thunderbird), after doing the operating system upgrade. I tried to add my yahoo e-mail account. Settings are as follows:

• create accounts in the new Account Hub is unchecked (off).
• accept cookies from sites is checked (on).
• remember password is checked (on).
• I'm using "IMAP".

When I click "Done", a separate window pops up in which yahoo asks for my password. After entering it, yahoo says "Something went wrong", and gives no other indication of what the problem is.

If I instead "Configure manually"... I tried both the default hostnames and "export.imap.mail.yahoo.com" for the outgoing server. I tried both "Normal Password" and "OAuth2" authentication methods.

In all the above cases, I get "Unable to log in at server. Probably wrong configuration , username or password." with a yellow background.

I see nothing of "Edge Too many requests" as was happening to several people recently.

How do I add my yahoo account to this new Thunderbird on Fedora-42?

Yesterday I opened Thunderbird to find that it was trying to download 8205 emails. 15 emails actually downloaded, there were no messages in SPAM folder. The notification at the lower right showed 300 more had 'downloaded' before I shut off the internet, went into Safe Mode, ran a virus check to find no threats found. No SPAM was recorded in Thunderbird when I went back online. There were, however, several files with large attachments so I don't know if this is a glitch regarding data vs. actual number emails because when I checked for updates (see attachment) I discovered that since Version 115.4.2 I HAVE NEVER BEEN NOTIFIED OF UPDATES OR *FAILURE* TO UPDATE. AUTOMATIC UPDATES have been turned off and will remain turned off due to nearly dialup speed lack of bandwidth. I will abandon Thunderbird for having a fatal programming defect before turning on automatic updates. My actual email provider did not show 8205 additional emails so I am concerned about a possible malware backdoor. Today 15 emails downloaded while the little notice at lower right said it was trying to download 113 ghost emails. I shut off Thunderbird and came here to post the problem. I will update Thunderbird, but need to know if there is a temporary file cache or some other hideyhole that the ghosts (or some attacker) might be storing godnosewhat so that I can either quarantine or delete them?

Hi,

I've been using TB for years but had a hard disk crash and moved to a new machine.

Configuring TB to access my Yahoo email with Pop3 works for a while but I frequently get messages telling me that my password is wrong when it is not.

I've tried every method listed on the Yahoo website but nothing seems to be reliable. I never had this problem on my old machine but I was using an old version of TB.

Could someone please tell me how I should be configuring TB for Yahoo?

Thank you.

The OAuth2 authentication process starts normally. However, after I click "Allow" in Thunderbird to grant access to my Gmail, I encounter an error stating: "Failed to establish a secure connection to localhost." The specific error code is SSL_ERROR_INTERNAL_ERROR_ALERT.

I have already tried adjusting settings related to cookies and JavaScript, but it didn't resolve the issue.

An upgrade a couple of years ago resulted in the top-listed reminders having a dark blue background that making it unreadable. I have been told by Tbird support that 'this is a known issue' but, after many upgrades since, it has not been fixed.

Much thanks in advance for any suggestions for fixing this.

From Microsoft: "Recent Outlook Mobile updates introduced a stricter and more standards-aligned S/MIME message structure. The messages themselves are valid, but some third‑party mail clients such as Thunderbird do not fully support the way Outlook mobile structures the encryption. As a result, these clients may display a blank message body even though the encrypted content is present.

As a workaround, if you need to send encrypted mail to recipients who use third‑party clients, use Outlook desktop or Outlook on the web instead of Outlook mobile. These versions generate encrypted messages in a format that is more widely supported. "

I couldn't find this reported anywhere in these forums. Is there a solution being worked on to address this issue? Or has anyone found a workaround? We are stuck with using the Outlook app until the Thunderbird app supports S/MIME.

Hi! I need your help! No one I know uses thread grouping in the mail list. Except for one person who asked me for help. I checked, and I have the same problem: Thunderbird 140 ESR doesn't save the expanded or collapsed status of threads. Even changing folders and returning causes all threads to be collapsed or expanded (depending on the last expanded/collapsed all hotkey pressed). A friend claims that everything was saved for him before. I tried resetting the global index, but it didn't help. Please, if you know the setting responsible for this, or know the correct behavior for Thunderbird, let me know.

Hello,

I have problem with this following message: authentication failed when connecting to imap.gmail.com. Nothing changes in my computer but Thunderbird from today 14:00 displayed this message and is not possible read new messages - it looks like not possible to load the message text.

Thank you

I use Thunderbird 145 on Ubuntu and try to use the new Exchange option. It recognise the account as an Exchange account but no password entry dialog is showing. I have switched to Auth2 too and if I try "Get Messages" an error pops up.

Thanks for support

Buongiorno, ho sempre usato questo programma ma, per ragioni logistiche, ho cambiato password da legalmail alla mia pec. Non riesco più a configurare la mia pec su mozilla thunderbird da quel momento poichè mi dice che l'autenticazione al server non è riuscita. configurazione,email o password errati. Come posso fare? Grazie

Hello fans of Thunderbird and W10 32 bit, I have maybe a luck day today and I have found, where Thb has saved my enclosures .. my and maybe Thb and W10 32 bit problem is, that I cannot tell Thb, where it has to save e-mail enclosures, so Thb saves them to temporary folder of W10 32 bit ... user\...\AppData\Local\Temp\... (W10 jungle folders) ... There is a simply manual, how I can save today one my enclosure on attached image ...

In both my Inbox and my saved email folders, when I click on an end-to-end encrypted email, Thunderbird (v145) displays "Loading Message..." and then blocks with a spinning blue "working" cursor for on the order of 30-60 seconds. The Thunderbird dialog then appears to make some progress, as the windows seems to "flash" as if it's being cleared, but the email content doesn't appear. After about another 20-30 seconds, the encrypted email contents appear, correctly decrypted.

This long delay only occurs when I click on encrypted email messages, and it happens every time I click on an encrypted email message, and this behavior only started occurring in the past couple of days (correlated, I believe with Thunderbird updating to v145) so I think it's safe to assume the issue is with end-to-end encryption/decryption in Thunderbird v145.