Thunderbird Community Forum

I have Thunderbird 153.2.0esr which runs 2 Email filter (on Inbox and on Outbox)

These filters worked for years.

Suddenly, about at the end of July 2026, the stopped working.

I suspect that one of the latest release of Thunderbird make them stop working.

Is it possible? Any suggest?

Also the filter log registry is empty.

I try to set up gmail but get the message "Error Creating Account Incoming server already exists."

I have my main Spectrum email set up fine but I have no idea where to even begin with setting up gmail since I get the message above.

Thunderbird not connecting to server. It says timds out and an error occurred connecting to mobile.charter.net. I can neither send or receive emails. This started 8/20/2026

After swapping to The Bat some years ago I decided to come back to Thunderbird again. So I installed Thunderbird 155.0.1 (64-bit) on my Windows 11 PC, and gradually re-created and connected the the accounts I had on the back. I also installed the ImportExportTools NG addon, then exported my emails from The Bat to Thunderbird. So far so good. However for some reason I created an account twice. There are both for the same GMX account, but one is POP and the other is iMAP. This mistake probably happened after a long session of setting things up and I just forgot about the first account.

I looked through the Thunderbird help and the answer most given was to the Thunderbird menu, select Account Settings, swap to the account you want to delete, and then press the large red DELETE BUTTON on the top level of its settings (next to the DEFAULT button). I've tried this and it doesn't work. There's no confirmation dialog (which is what I was expecting) and if I close and reboot Thunderbird the account is still there.

How can this be fixed?

I want to use Thunderbird for transferring email folders from my Yahoo email account. I have no idea how to do this. Simplify, please. Not computer savvy. Thank you in advance

An example of an added space would be:

director-concertband@oceanside- music.ca

Note that after the second dash in my address above, in the saved HTML Sig Card, the space is added. When I remove the space and re-save the Sig card, the space still returns.

Also note that this happens ONLY in the signature card. The addressing in the email itself is correct. Any help you can offer would be appreciated.

I'm aware (e.g. https://support.mozilla.org/questions/1277401) of how to toggle whether the message window stays open (opening the next message) when an email is moved or deleted. But I would dearly love for it to happen only sometimes.

Specifically, when a new message comes in, I want to read it, usually move or delete it, then read the next new message, if there is one. But if the next message is an old one, I don't want to keep having it shown to me. I keep my inbox fairly tidy, but I'm getting sick of seeing that message from a year ago that doesn't have a better place to be.

So, after moving or deleting a message, if there is an adjacent unread message, keep the window open. Otherwise, close it.

If there's an unread message somewhere else in the folder, don't jump to that one. Trust that I've left it unread for a good reason, and don't want to now constantly get shown it, and also have to remember to mark is as unread again.

If it's easier to look for other unread emails based on dates, a few days (enough to span a long weekend, for example) would probably be enough, a week at the most. Or make that number user-configurable.

Since this morning there is no sign of my emails accounts and majority of functions appear disabled, it never happened before. Can somebody explain what happened?

Please check the image attached

For the last two or three weeks I have had problems with Thunderbird not downloading e mail from Charter for a few days and then it does for another few days, then it doesn't. Back and forth until the last two days it just seems dead, doesn't receive or send anything. What do I do?

Recently I posted about this problem here: https://support.mozilla.org/en-US/questions/1580858 In sum, I was having problems both in downloading messages from the Spectrum server and also with sending messages. I've attached screenshots of the error messages.

Matt and David kindly posted some helpful responses. The problem then seemed to spontaneously solve itself and I breathed a sigh of relief. Then a few days later it re-appeared.

This time it's not quite as bad in that I'll get the error messages but then usually a few minutes later I can download the messages or send an email. But it's still a real problem.

I called Spectrum again and this time the rep was adamant that if I can still use the Spectrum webmail feature (and I can), then it's not a Spectrum issue.

Last time Matt asked about my antivirus. I use Windows Defender (and occasionally do a manual scan with Malwarebytes free version), so if I understood him right, I should be OK as far as antivirus interference.

Matt also suggested I set TB so that I download messages at startup and every 15 minutes. I was set to every 10 minutes so I changed it to 15.

Matt said for me to check the Activity Manager. I've attached a screenshot of what that showed a few minutes ago. But I should note that this was after an error message displayed but my email downloaded anyway.

Finally, Matt said I should check the Error Console (Control + Shift +J). I've attached a screenshot of that. He also said I should use the trash can to clear it, so I did. He then said to press Shift + F5 to attempt to get my messages. But on my laptop, F5 just dims the display so no dice on that. But I have a second laptop and F5 is "neutral" on that one so I tried it there. I didn't get any new error message.

However, one of the screwy things is that sometimes I get all my messages as normal, but only after the "Can't connect to the server" message displays. And that's what happened with my second laptop above.

I hope I've provided better info. this time. And I hope you gents can help me with this mess.

Thanks,

Andrew

thunderbird Version 153.2.0esr (64 bits) Hello, following an update, email retrieval is no longer working for an account with a ....@rocketmail.com address. Thunderbird opens a "Yahoo" login window, but when I enter my address, it is flagged as invalid. Fortunately, I am still able to log in to this account via a web browser. (Google translation from French to English)

I can no longer get email from my Yahoo email account. I've gone through all the troubleshooting hints and recommendations, as I understand them, but without any luck.

I only have the one account.

The Activity Manager (see attached) shows "No messages to download", but the message at the bottom left said there were messages, but TB doesn't download them.

I think I posted my question in the wrong place yesterday, because I've had no responses. I will delete that Post.

Since yesterday I have been unable to send emails from any of my email accounts. Most are Microsoft accounts.

The first message attached 'pops up' every time I open / reopen Thunderbird Mail.

I saw something that looked unfamiliar to me under Programs and Features and have attached a screenshot of that, along with a screenshot showing the version of Thunderbird on my desktop PC.

Could updating to the latest version of Thunderbird have caused the problem?

Repeated attempts by Thunderbird to sync have alerted Google security about a gmail account I've been using. gmail requires me to sign in, but after entering my password, won't accept the UK phone number I am required to enter to verify my account. Clicking on 'Try another way' doesn't give me another way, so I'm in danger of losing access to that account.

Is there a quick and easy means by which I can permanently save all my sent and received gmail emails that are presently in Thunderbird?

These will be lost if I have to delete Thunderbird or when my PC fails. I can back up files on my PC but not Thunderbird emails so far as I'm aware.

Inbound emails are going to Trash instead of Inbox.

No changes have been made. How can I check settings to find a solution? I see nothing related to this issue. Thanks for any help.

I have quite a few tags and quite a few message filters which are set to add tags. In the last few days, although the rule will automatically add a tag when I run it, it seems to be being deleted again almost immediately.

I have deleted several now obsolete message rules in case there was some kind of stack overflow problem, and likewise removed several obsolete tags, but it seems to be still happening. Is there a maximum number of permissible tags and/or a maximum number of permissible rules that invoke tagging?

This is a new phenomenon to me. I am on the latest stable release of Linux Ubuntu and Thunderbird 153.2.0esr (64-bit)

I used to be able to set message filters to play a sound of my choosing after a message was filtered into a folder (a chime so i know when mail from a client arrives). For a while it was not an option, so I used various extensions that eventually were no longer supported (ToneQuilla, Mailbox Alert, FiltaQuilla, Soundmail). I suspect that the last one may have corrupted my Thunderbird and caused my recent issues, so I removed it (and now I have no extensions installed). Sound Mail is the only extension I can find that plays a sound for filtered mail only.

Meanwhile, the "Play Sound" option has appeared again in v155.0.1, but with no choice of sound file, and nothing plays. It's not a sound issue; other sounds play in other programs, and the normal new mail sound plays when I enable it (but I don't want sound notifications for all mail, just client mail).

Any solutions?

Thunderbird is downloading new messages but failing to display them.

Other functionality remains active, ie I can see and open messages, delete all the contents of folders, compose and send messages, but when the software downloads new messages they simply do not display and cannot be accessed.

Not sure if it's relevant, but the message INBOX count appears to be stuck at the number 59, although more messages than that have been downloaded.

Bizarrely this is the message displayed whenever I now open the Thunderbird application (it was there when the problem first appeared and returns everytime). Out of desperation I even made a donation in the hope it would release the messages!

Thank you in advance, Steve Davidson