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Just opened TB. There were 8 or 10 emails. Went to another app for a few seconds. Went back to TB. Emails were gone. Have NO idea what happened. Know of any way to get them back or where they went?

"Could not get folder db" is the message. I've tried all the suggestions that google provided - nada

Windows 11 25H2 (OS Build 26220.7271) Thunderbird 145.0 (64-bit)

5 accounts are defined. Some filters work on startup, but new ones do not. Manually running filter results in "could not get folder db"

I'm a long time user and supporter. All of a sudden I can no longer send messages. After completing the message and entering info, there is no "SEND" in the upper left of the screen so the message can not be sent??????? Could use some help............................... Joe DellaFera [edited from public forum] @suddenlink.net

Hi,

we use Thunderbird for several business e‑mail accounts (for example info@… and similar), all configured as IMAP, and the same mailboxes are used by multiple people on several computers. Our mail server hostname is nickel.studio4web (Studio4web hosting).

We have noticed the following strange behaviour of messages (usually customer orders):

A new message arrives normally in the “Inbox” folder.

After some time, for example the next day, the same message also appears in the “Trash” folder, but it is still visible in “Inbox” at the same time.

We checked the headers; the Message‑ID field is exactly the same in both Inbox and Trash, so it looks like one and the same mail that exists in two folders at once.

In Thunderbird Server Settings we configured the delete behaviour so that messages are either moved to Trash or removed immediately (we tested both options), and after that we ran Compact on both the Inbox and Trash folders. However, some messages still remain simultaneously in Inbox and Trash.

We know that other team members open the same accounts in other clients / on mobile phones or in webmail, but we are not sure whether that alone can explain this double appearance of the same message (Inbox + Trash).

For example, two order emails from 03.12. were in Inbox only on that day, and today we see them also in Trash, while they are still in Inbox. No one remembers explicitly deleting them.

Questions:

Is this behaviour normal for IMAP in Thunderbird, or does it indicate some bug or wrong configuration?

Is there a way to prevent a single message from being present in both “Inbox” and “Trash” at the same time (so that it is either only in Inbox or only in Trash)?

What else should we check in Thunderbird settings or on the mail server (filters, special IMAP options, automatic cleanup, server‑side rules, etc.) to avoid such “duplicate” messages?

Environment:

Thunderbird version: 140.5.0esr

Operating system: Windows 11 Pro

Mail server / provider: nickel.studio4web (Studio4web hosting)

Thanks in advance for any help and advice.

Good afternoon, I am using Thunderbird for many years now. In the last ~2 years I have seen several times the subfolders of the mail folder disappearing from the list on the left panel. All of them are correctly subscribed. I would like to know if there exists a way to recover them different from deleting the account and recreating it. I am currently running Windows 11 Pro 25 H2 with Thunderbird 145.0.

Did anyone experienced such an issue? Thanks Riccardo

Namely, that my antivirus program quarantined the entire inbox file upon detecting malware embedded in a single message.

So I encourage people who encounter this issue to explore that as a potential cause.

Thanks to those who responded for the help and patience.

I have spent 3 hours trying to figure this out. Nothing works for me.

Authentication always fails yet when I log into Outlook it always works.

I turned off using the new hub and was able to setup my email account but it told me OWL was not active (or something about OWL).

Godaddy is my provider.

What am I not doing correctly?

My emails sent folder has 485 messages. Is there a way to delete them all at once instead of individually?

Also how do you check for new email if you're in the program. I have been shutting Thunderbird down and then opening it back up. Is there another way of doing this?

For months I have been working around a problem with Original HTYML message displays in my inbox. I have to revert to message body as Simple HTML for it to be readable. Please see the screenshot.

I am using Thunderbird 115.5.2 (64-bit) on an older iMac on OS 10.12. I have four email address accounts, all gmail, and using POP. I have stored emails I wanted to keep in sub folders in Local Folders. This has all worked well for years.

Yesterday I lost lost all content from some of the subfolders in Local Folders, while some retained some content and a few seem intact. I also lost most emails that had arrived in the inboxes in the last week. The folder pane still shows the accounts, with their own set of folders. As usual, the inbox folders are highlighted with the number of new emails downloaded from the Gmail server to each address, but I can not see them in the message pane, or find them anywhere else. I sent a test message from one of my addresses to another – It didn't show as sent in Thunderbird, but did go through the gmail server and the message count of downloaded messages on the recipient address went up by one, but I couldn't see the email. Then I tried clicking on the folder "properties" then 'Repair Folder' but nothing happened, although the information on that window showed the number of messages and MB that I would expect to be in that folder, rather than what was there, which presumably means they may still be in there somewhere? I would be very grateful for help – I'm not tech savvy and feeling completely lost.

I have tried to make a new folder and it never shows up. I then tried to create a sub folder and it never showed up. I don't know how to fix this problem. I started Thunderbird in troubleshooting mode and still could not fix the problem

I just created a new email account in Thunderbird. I've used T-bird for 15 years. Normally, when I highlight an inbox email and then press the keyboard "Delete" key, the message is sent to Trash. But on this new account, when I press Delete key, the message briefly disappears, but then comes back into my Inbox. It doesn't go to Trash.

I checked the Server setup and confirmed it is setup to move Deleted email to "Trash on xxx@xxxx.com"

In Draft area, when I ask to save the item, it disappears every time and I can not find it anywhere. The same thing happens on another email account on a different computer. I am unhappy.

For the last month I have been unable to send outgoing messages from my Thunderbird program. Initially I also stopped receiving messages, but a local commputer technician helped resolve that. I can now receive messages but, if I try to send an email I still get this message: "Sending of the message failed. An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: p-impout003.msg-pkvw.co.charter.net cmsmtp 68.235.43.158 blocked. Please see https:// www.spectrum.net/support/internet/understanding-email-error-codes for more information. AUP#Out-1120." I have tried to resolve this through Spectrum and was told I would have to go to Thunderbird Support.

Please replyby: email: redacted@columbus.rr.com

              Phone: redacted
           or USPS: redacted

Thank you for any response Richard E. Hartle