Komunitné fórum Thunderbird

Hello,

Recently, the manual message check feature has stopped working, whether I use the “Get Messages” button or the menu.

When this feature was still working, I could see the progress of the message retrieval from the server in the status bar; now nothing happens (no display in the status bar and no messages are retrieved).

I should note that this isn’t a connection issue, since new messages are successfully retrieved during periodic checks or when Thunderbird starts up.

Has anyone else encountered this problem?

Thanks!

My Thunderbird Account was updated by TB on 2 September. Since then all of my new emails go to Trash. Although I've tried the various responses to such questions, I've been unable to change the problem and get my new emails to come into my Inbox. I'd very much like your assistance please. Thank you.

Was on version 115, had this problem. Updated to version 155, same problem. One of the email accounts I set up on Thunderbird is redacted1@lake48.net, registered with 123-Reg. However, this is a forwarding address and has no email server, which is why I am getting the error now.

Messages addressed to redacted1@lake48.net are forwarded to redacted2@lake48.net, which does have a server, My system was to download from there and use a rule to divert the incoming message to my redacted1@lake48.net Inbox. This has worked OK until now. Thunderbird gives me this error right at the start and then does not respond, so I cannot get in to investigate account settings, and cannot access emails in other accounts such as gmail. 123-Reg has today changed its system, assuring me I don't need to change anything. Clearly I do, but I can't get in to change it.

What should I do to resolve this? I have no other access to my emails.

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

System:

Win 11 Home (lastest updates, also my notebook's latest updates from the manufacturer) Thunderbird version 151.0

Okay, this is a multiple clusterf#@$.

I ended up needing to do a Win 11 Home "reset" keeping data. But I needed to back up some files first. But my back up drive was full. Usually, it's because of EaseUs ToDo not deleting files and just adding and adding to the system backup. But that wasn't the main issue: my Thunderbird profile (which I backup separately) was about 280 GIGABYTES in size! This is an extension of a prior problem for which nobody on here new how to solve and certainly nobody from Mozilla chimed in to help. So I did what I'd done before (but it'd never been like this) and delected a couple of THOUSAND seemingly redundant iterations of files from my profile, but NONE of the folders inside the profile.

Of course the Win11 reset deleted Thunderbird and all the profile information. No big problem, I've done this before...but it didn't work copying in all of the old files (from my backup drive) into a new profile and selecting that profile to boot. So, I went to the "Recycle Bin", undeleted all of those files back into my backed-up profile. But I'm only able to get Thunderbird to see all of my address book information. It is not finding my Thunderbird and email account settings nor my email messages (21 years worth). I 100% did NOT delete my email messages (c:\users\USERNAME\AppData\Roaming\Thunderbird\Profiles\PROFILENAME\Mail).

I can laboriously redo my email account information (five different accounts) and Thunderbird user settings, but I really DESPERATELY NEED HELP restoring my email messages.

PLEASE PLEASE HELP ME!

Aloha. I'm helping a friend with setting up a new Windows 11 PC, and cannot get Thunderbird to connect to Spectrum's servers. I spent an hour on the phone with Spectrum support and they just gave up and said it must be an issue with Thunderbird. Here are the details:

- Brand new Dell 24 All-in-One EC24250 - Windows 11 25H2 plus all additional fixes. - All Dell drivers updated. - Thunderbird V155.0 64-bit

If I click on 'Get Messages' after a while I get: "Connection to server mail.twc.com timed out". I've gone into the config editor and changed mailnews.tcptimeout from 100 to 500 and still get the error.

In the Account Settings | Server Settings | Test server connection I get: An error occurred connecting to mail.twc.com:993.

I've tried this with both setting up a brand new account in Thunderbird, and also via copying the 'Thunderbird' folder from %appdata%\roaming from her old machine.

Email configuration (from Spectrum).

IMAP Settings Server name: mail.twc.com Port: 993 user name: abcd@hawaii.rr.com Connection Security: SSL/TLS Authentication method: Normal password

SMTP settings Server Name: mail.twc.com Port 587 Connection Security: STARTTLS Authentication method: Normal password

Can anyone help me troubleshoot this scenario?

Mahalo, Harry Z

suddenly it's taking minutes to send an email - if it sends at all. Many times I get a 'failed' pop up window but when I click SEND again it will sometimes go through. Also Some of my emails aren't coming up - only a few of them. And they aren't un-bolding.

I installed Thunderbird on my new laptop, then imported the profile from my old laptop

The main screen has, under "Inbox", folders for Drafts, Sent, Trash, Archive and Spam, which are being used by the program

Folders for Drafts, Sent and Trash also appear under "Local Folders" (along with Outbox) and these aren't being used by the program.

How do I get rid of these duplicate folders? "Spam" had a delete option, so that was easy, but the others don't.

I tried the two suggestions for a previous "Duplicates" question but they didn't resolve things.

Thank you

I have used Thunderbird with the same email account for years, creating subfolders and moving emails to the subfolders with no issues.

With Thunderbird 153.0.1, after creating a new subfolder in the account, when attempting to move emails to the new folder, I receive the following error:

"Thunderbird: The current command did not succeed. The email server responded: APPEND invalid flag list"

When I receive an email, all the addresses in the incoming email are added to my address book. As a result I get email addresses added of people I don't even know. I want to stop that.

Sending of the message failed. An error occurred while sending mail. The mail server responded: <anonymous@[10.0.0.31]>: Sender address rejected: not owned by user a1.914306843. Please check the message recipient "christine.krieger@a1.net" and try again.

why do I get this on new download

Thunderbird demands my password for outgoing SMT server when I go to send an email but when I enter it, system won't accept it even though it is the correct password. I have had this problem for some time and it comes and goes. Sometimes I have ebeen able to send without a problem, then it comes back I had a helpful reply from this forum (can't find who posted it - Mick?) tellling me to go into the error console (Ctrl + Shift + J) and delete eveything in that. I tried that. It worked at first, but now when I do it, it has no effect. And the problem now appears to have become permanent, although occasionally after I have been working for some hours, then suddenly I can send without any problem. Problem hasn't budged though for a couple of days now. This is a mysterious and erratic gremlin, which now seems to have taken root. Any suggestions please? Carol

Hello,

My internet provider is RCN. For the past couple of months, I’ve occasionally been getting the message, “Connection to server imap.rcn.com timed out.” As a result, I’m unable to receive emails via Thunderbird.

All my settings are correct. Usually, the problem resolves itself within 24 hours, but sometimes, like this time, it lasts longer.

Any suggestions? Best, Magda

The last message in my inbox was on 9/3/2027. After an update, now all messages are now going into a different folder, which has only one rule, and that is all messages from a specific email address. Just now, all messages from my inbox just emptied into a different folder. I don't know what happened with Message Filtering in the latest update, but I have to turn off filtering.

I have many years and email accounts on my old WIN10 workstation running all POP installations.

I have a new workstation with WIN11. Is it possible to install TB on my new workstation with my accounts installed as IMAP and keep the same folder configuration? I have many email folders and filters setup on the old workstation installation.

I would appreciate any installation recommendations. I've been using TB for years and would like to keep as much of the current configuration as possible.

Problem with message are going to the Trash folder, not the Inbox with all local folders in place. After taken in profile the local folders off, the new downloading from message are working just fine to the Inbox . What is the problem Thanks for helping.

MY second email account (droulston@btinternet.com) stopped working 3 days back (it has been OK for many years). I tried uninstalling and reinstalling but my password was not accepted.

As of September 3, 2026 all my new emails are going into a random folder instead of the inbox. This is also happening on my wife's PC plus and we are not getting the emails to our iPhones until we get out of Thunderbird. What has changed? This has not happened before.