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I have this problem since a couple of days, it is new . When I move my emails in local ordners then they stay in the web.de Inbox on the server and in the app. What can I do that they are automatically deleted when I move them in local ordners?

It has been some days that any email I reply via thunderbird is not saved/copied in the "sent" folder, although I checked both "sent" folder and “Place replies in the folder of the message being replied to”。

It was all OK before: my replies were in both "sent" folder and in the tree of inbox. However, now my reply only shows in inbox. The only way I find now to have my reply in the "sent" folder, is to uncheck the "Place replies in the folder of the message being replied to" option, but I want my reply in both folders as how it was before.

This is extremely annoying, as I can't know if the email has been correctly sent or not. How can this be fixed?

Hilfe bitte: Seit heute "Anmeldung auf dem Server secureimap.t-online.de fehlgeschlagen". Vorher Funktion jahrelang ohne Fehler.

Since upgrading to a recent version of Thunderbird ESR (a few weeks ago), I regularly receive notifications of error for a Yahoo mail account. I do not receive these notifications for other mail accounts. The notifications are as follows:

• The current operation on 'inbox' did not succeed. The mail server for account example@yahoo.com responded: p.
• The current operation on 'inbox' did not succeed. The mail server for account example@yahoo.com responded: UID FETCH completed.

I have deleted and recreated the account to no avail. Searches for similar issues has revealed nothing of use.

Any idea what is going on?

Version: 153.5.1esr (64-bit) OS: Windows 10 Language: English Proxy: None Email connection type: IMAP Authentication: OAuth2 Connection security: SSL/TLS Encryption: None

Every time I send an email to more than 25 or so recipients, the message does not send and I need to reverify my Hotmail account. After I do that, I resend and it goes thru fine. Not sure what the problem is. Thanks,

Ron K

Dzień dobry od dłuższego czasu (tygodnie) mam problem. Kiedy ktoś wysyła do mnie wiadomość, na koncie wysyłającego pojawia się automatyczna odpowiedź zwrotna zawierająca nieznany, niepożądany adres mailowy :officebackup.chk@gmail.com. Niezależnie od odbiorcy wiadomości, wszyscy otrzymują tego typu wiadomość, jak poniżej przykład: Przykładowa infromacja: Temat: Mail delivery failed: returning message to sender Data: Wed, 28 Oct 2026 14:19:34 +0100 Nadawca: Mail Delivery System <Mailer-Daemon@da2.fantex.pl> Adresat: prima@fan-tex.net This message was created automatically by mail delivery software. A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

officebackup.chk@gmail.com host alt4.gmail-smtp-in.l.google.com [172.253.158.27] SMTP error from remote mail server after RCPT TO:<officebackup.chk@gmail.com>: 452-4.2.2 The recipient's inbox is out of storage space. Please direct the 452-4.2.2 recipient to 452 4.2.2 https://support.google.com/mail/?p=OverQuotaTemp 41be03b00d2f7-cdad55fbfd5si6228338a12.395 - gsmtp: retry timeout exceeded

Jak pozbyć się tego adresu z poczty? Uprzejmie proszę o pomoc. Z poważaniem Robert

My Thunderbird account is reciving, but won't send I have changed nothing ( BUT - I noted a firefox update just now - has this caused the glitch? ) How do I get "SEND" back on my emai, please?

Good day Thunderbirds

I seem to have done something rather disastrous. This morning when starting up my inbox is empty and though i have sent test messages from other mail platforms and they arrive in my Gmail account they are not downloaded to my Thunderbird. I did change the Gmail conversation option, because i want each mail to be separated. The combining of all related mail confuses me. I have reset the option but nothing has changed. All the other folders are intact and if i open "All Mail" every message is still there including the added test messages. Can anybody figure out what i have done and help me restore my Inbox? What if i re-install Thunderbird or something like that?

Here's hoping. I really do not want to access my mail online via Firefox. Thunderbird is my only way of managing 158.0mail.

When I attempt to write or forward an email, the send option is grayed out and I can not send. But I can reply to an email and the send icon is active. Could this have something to do with the fact that I have had a substantial number of emails and I have used thunderbird for many years causing a pointer to flip? If so is there a way to fix this?

Details: Write/forward email send disabled, reply email works fine. Thunderbird for Linux Mint mint-001 - 1.0 153.4.0esr (64-bit). Linux Mint 22.1

Thunderbird has been receiving emails on my PC from Bell Sympatico for years, then suddenly stopped in July 2026 without my changing any settings, and I have to go to the Bell server instead.

Thunderbird 158.1 – Outlook.com SMTP OAuth2 authentication failure

I am using Mozilla Thunderbird 158.1 (64-bit) on Windows 11.

I recently created a new Outlook.com email account, kim.bailey69@outlook.com, alongside my existing Hotmail and ntlworld.com accounts.

The problem

Thunderbird successfully receives emails from my new Outlook.com account using IMAP and OAuth2, but cannot send emails from it.

The error messages are:

"Login to server smtp-mail.outlook.com with username kim.bailey69@outlook.com failed."

"Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) smtp-mail.outlook.com."

SMTP configuration

Server: smtp-mail.outlook.com

Port: 587

Connection security: STARTTLS

Authentication method: OAuth2

Username: kim.bailey69@outlook.com

Troubleshooting already completed

Verified all incoming and outgoing server settings.

Confirmed IMAP works and messages arrive successfully.

Confirmed sending from Outlook.com webmail works.

Confirmed my existing Hotmail account sends successfully through Thunderbird.

Tried smtp.office365.com as an alternative SMTP server, without success.

Created a completely new SMTP server entry and assigned it to the Outlook.com account. The same error occurred.

Deleted and recreated Thunderbird's saved Microsoft OAuth2 authentication token.

Checked Microsoft's authorised applications page. Thunderbird has explicit permission to send emails, and Microsoft confirms it was used today.

Checked Microsoft's recent account activity, which showed no unsuccessful sign-ins.

Verified with PowerShell that TCP connections to both SMTP servers on port 587 succeed.

Checked that cookies are enabled in Thunderbird.

Attempted SMTP diagnostic logging using MOZ_LOG with SMTP and SMTPClient modules, but the resulting log files remained empty.

When sending fails, Thunderbird immediately displays the authentication error without opening a new Microsoft sign-in window.

My question

Why does Thunderbird successfully authenticate to Outlook.com for incoming IMAP mail but fail SMTP OAuth2 authentication, despite Microsoft granting permission to send?

Is this a known Thunderbird issue, and what specific diagnostic or corrective action would you recommend that has not already been tried?

I would prefer to resolve this without deleting or recreating my existing email accounts, as they contain many years of messages.

I have Mozilla Thunderbird Meddow 158.01 . I have registered my name with Mozilla inserted my name in the dialog box turning "Their network" to "Your Network" . I put in a primary password to keep out hackers, Mozilla still wouldn't work. A friend suggest I change the primary password, still didn't work. I switched things around trying to get Thunderbird to work. Thunderbird still couldn't send or receive.

I have now the version 158.01 (64-bit) with Windows 11. My Gmail account only dowloads email like once a day. The server settings are: -Check for new messages at startup -Check for new messages every 10 minutes This started a few days ago, while I had the version 158.00. I have many accounts on Thunderbird, and re-installing all of them would be time consuming. Any suggestion?

Thunderbird 158.0.1 (64 bit) Thunderbird codename Meadow, Mozilla Thunderbird Snap for Ubuntu-snap-build - 1.0

Running on Ubuntu Linux 24.04

Problem downloading emails from Yahoo

For years there has been no problem, but about 2 weeks ago downloads stopped. Pane at bottom of Thunderbird says downloading message 1 of 292, but is is stuck at 1 and nothing downloads.

Today something different is happening, it downloads the first 80 messages then returns again and downloads same messages again, then repeats. I now have 17 duplicates of these same 80 emails just in the time to write this and it is still downloading the same 80 over and over again.

I have searched internet for solutions. I have done the following:

Updated to Oauth2 through Yahoo website. Thunderbird shows a saved login password oauth://login.yahoo.com, plus my correct email address, plus an OAuth2 password

Checked all server settings. All correct, e.g, pop.mail.yahoo.com Port 995 SSL/TLS security, and OAuth2 authentication method

From server settings page I tested connection to server which came back successfully

Same as above for outgoing server.

I have ample disk space on my computer and ample data capability on Yahoo account.

Confirmed not in offline mode. Confirmed cookies and javascript enabled.

BTW, I can access all my mail on Yahoo’s web page, but that is inconvenient. I really prefer access through Thunderbird.

I have deleted global-messages-db.sqlite and Thunderbird reestablished it. Did the same for popstate.dat, and inbox.msf

I even uninstalled Thunderbird and reinstalled it but no improvement in the problem.

I am out of options now. What to do? Thanks so much.

I can't receive or send emails for the address [redacted] @orange.fr with thunderbird. I get the message: Login to server impa.orange.fr failed - retry - enter new password - cancel

If I use Ctrl+E to resend an email it loses all images (both in signature and any attached).

Thunderbird: 158.0.1 (64-bit)

Was working fine before. Stopped recently. If I send a new email, or forward an email, all works fine. Only if I Ctrl+E

Thank you kindly