Thunderbird Community Forum

“My Spectrum email address is [redacted]@charter.net. Spectrum webmail can send and Thunderbird can't receive or send. The outgoing server is mobile.charter.net and the connection times out. I tested the connection from my computer and ports 587 and 465 both respond successfully. Thunderbird is set to No Proxy. when i tried to send today, it gave me this message, "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) mobile.charter.net timed out. Try again." i contacted spectrum about this and now when i try to send, it says nothing and the message never arrives.

all INBOX emails disappeared from one of my email accounts. The other is working fine. Emails that were still open in one of the tabs are also now just an empty tab. --no luck repairing folder or deleting INBOX.msf. If I go to the Charter/Spectrum website the emails are still showing What should I try next?

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

My Thunderbird, from Debian is:

140.13.0esr

I've often wondered what the point of 'extended support release' (I think) really means. It sounds retrograde. Should I switch/upgrade?

When I added a new subfolder it disappeared. When I tried to add it again it just shows up. Today I can't add a new subfolder and the info in the folder I had won't show up.

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 just installed Thunderbird 154, but i cannot find the address book. i know it exists as T-bird does preload my addresses when i create a new email. Is there a button that I am not seeing?

Bonjour,

Depuis le passage à Thunderbird 154.0 (64 bits), plusieurs de mes comptes IMAP ont vu leur arborescence se modifier de façon inattendue.

Avant, j’avais une présentation de ce type :

Brouillons Envoyés Archives Indésirables Corbeille Courrier entrant Clients Fournisseurs etc.

Depuis peu, sur plusieurs comptes, les dossiers spéciaux Brouillons, Envoyés, Archives, Indésirables, Corbeille apparaissent désormais sous Courrier entrant.

Le phénomène touche notamment :

un compte Orange ; un compte hébergé sur un domaine personnel ; un autre compte professionnel IMAP.

En revanche, un compte Free reste affiché correctement.

En comparant les abonnements IMAP, je constate que :

sur le compte Free, Sent, Trash, etc. sont réellement à la racine du serveur, tandis que les dossiers personnels sont sous INBOX ; sur les comptes qui posent problème, les dossiers spéciaux et les dossiers personnels sont tous sous INBOX.

J’ai essayé le paramètre :

Paramètres serveur > Avancés > Dossier sur le serveur IMAP = INBOX

Cela fait bien remonter les dossiers spéciaux au niveau du compte, mais cela remonte également tous les dossiers personnels, donc l’arborescence devient entièrement plate.

J’ai également constaté qu’un déplacement manuel peut produire une erreur du serveur du type :

Client tried to access nonexistent namespace. Mailbox name should probably be prefixed with: INBOX.

Je cherche donc à savoir :

Thunderbird 154 a-t-il modifié la façon dont les dossiers spéciaux IMAP (Sent, Drafts, Trash, etc.) sont affichés lorsqu’ils sont physiquement sous INBOX ? Existe-t-il un réglage permettant de conserver les dossiers personnels sous Courrier entrant, tout en affichant les dossiers spéciaux au niveau du compte comme auparavant ? S’agit-il d’un comportement connu ou d’un bug de la version 154 ?

Je peux fournir les paramètres IMAP avancés et les captures des fenêtres S’abonner si nécessaire.

Merci.

I've been using TB for years. Lately I can be browsing the Inbox when the contents will disappear and I get a message saying something like no messages found. After about 30 seconds the Inbox is displayed again.

TB never used to do this and it is similar to Firefox refreshing the screen which it also never used to do this.

Also how do I get from the Beta version to the standard version?

When I attempt to write/ reply/ reply all/ forward, the toolbar at top shows only the slanted pen symbol and "Write -- nothing below. So no "Send" button. The full toolbar that I am trying to recover is attached which I copied from a second computer. When I write click that "Write" bar at the top, noting in the drop down menu had any effect. Help/About says I am "up to date" running 153.1.0esr (64 bit)

Good morning -PLEASE help - I had numerous e-mails in my inbox that went away - when I opened this am only yesterday's were in there ......I am sooooooooo IT incompetent

Thank you in advance - some very important stuff was in there.....

After the latest update of thunderbird on 19-aug-26 I found that I could send emails but not receive them. After researching the problem I changed my server setting for imap to match what spectrum recommends, confirmed I did it correctly by spectrum. Test imap connection fails, but gives no information as to why. Tried 3 dirrent imap server: 1. imap.charter.ner 2. mobile.charter.net 3. mail.twc.com I confirmed with spectrum that I'm using the correct port number.

Is it possible to rill back thunderbird to the last release? Thanks for any and all help. I've used both google and duck duck go AI to look for answers.

account stopped receiving messages after 140.1.1esr update I deleted the account. I then tried to add a new account. It does not ask for a password but only Name and Email. Response: "Unable to log in at server. Probably wrong configuration, username, or password". Two other workstations use the same account and they are not having any issues with the account.

Even since Thunderbird 141.0 (64-bit) I've had two annoyances. I'm calling them that because it does not stop or prevent me from getting my email, that would be a problem. Here are my two annoyances:

1A. I have a message filter set up to these conditions. Match any of the following From isn't in my address book Personal Address Book From isn't in my address book Collected Address Delete Message

This message filter is for an account that should not be receiving important emails. I wanted all of the junk emails emptied so I would not have to intervene. There are emails coming to this account, but not of great importance nor frequency. Those are in an address book.

1B. This is on my primary account. Match any of the following From contains (I enter email address here) Delete Message

Since I use this account for business/personal use, I filter out spam/junk email this way.

The annoyance is the filters are not deleting the messages as they should and I am having to open the message filter on each account and click on the Run Now, and then it works. It is not 100 percent of the time not doing what it should, but about 65 percent of the time. I've used these two message filters for years and they have always worked. This annoyance only showed up in version 141.0 (64-bit) (+ the ESR Version - see below).

2. My second annoyance is when I click on New Message, then it creates one and I go to Insert then click on Image then Choose File (and pick one) then click Open then the square box appears and I click the OK button. As soon as I click OK, it throws me out of the email/message that I am editing to the main email section before you clicked on New Message. I have to go to the Thunderbird icon on my taskbar then hover over it to see two previews come up, the main email section and the message that I was working on. Then I click the latter.

So there are my two annoyances. If anyone else has experienced this and found a solution, it would be with gratitude if you would share that with me. I will add that I have reinstalled Thunderbird and that made no difference at all. I did have the ESR version and it too had the same annoyances as this version, so it did not help for me to change/install versions.

Thanks!

T-Bird is Freezing (Hang?) from start to freeze was 5 minutes and a few seconds. Have turned off hardware acceleration and now it freezes at just under 5 minutes. Have put on updates. Currently 153.0.1esr (64-bit). I have captured profile, and re-installed and picked up the profile. Still freezes. Turned off AV. Still freezes. I have compressed and "repaired" all folders. Still Freezes. I forced folders to get rid of anything older than 30 days. Still freezes.

I have been running the task manager, and T-Bird in frozen state is only using 4.3% of CPU at most. I do not see any slowdowns for any other program. So this is not a CPU constrained problem. And it certainly is not memory constrained.

All this started within the past month and I think it was after I put on an ESR update (don't remember which one).

I can kill T-Bird and start it and it will get mail if any, and will function for about 5 minutes and then freezes (or hangs). The system is set to fetch mail on start up and then every 27 minutes. I am not using Account hub (and don't know what it does).

One oddity -- This is a W11 Home system, and Mozilla keeps saying it is a W10 system. Could this be the problem? Wife is running a lesser laptop. It is also running T-Bird, but her O/S is a W11 Pro and she is not having this problem.

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"