Thunderbird Community Forum

I understand that Thunderbird recommends managing spam by trusting senders in the Personal Address Book and/or Collected Addresses. For that to work, I would have to put the many companies who send me messages that I needn't reply to into the Personal Address Book. But I prefer to only put people I know into the Personal Address Book. So I looked for an alternative method of managing selected senders, and thought I had found one, but it's not working.

The alternative I thought I'd found was to use Message Filters. I created a filter I called "Whitelist", and in the Filter Rules dialog I said to apply the filter when it is run manually, or when getting new mail, and to apply the filter after spam classification (although when this didn't work, I also tried running the filter before spam classification). I said to apply the filter when the "from" address matches a sender that I wanted to whitelist. And I said to set the spam status for such messages to "Not Spam", and to move them to my inbox.

Nevertheless, emails from the sender I specified continued to be put into my spam folder.

Am I doing something wrong? If filter rules cannot be used to override automatic spam handling, why does the filter UI allow you to set the spam status to "Not Spam"?

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?

I cannot get Thunderbird to launch. It acts like it is stuck on perhaps one account and circles keep spinning as if it never can get a few of my tabbed emails open. It keeps saying it "isn't responding." Since this began happening a few days ago, I've stopped the Thunderbird task through Task Manager, I've shutdown and restarted my whole system multiple times, I've updated to the latest Windows platform and made sure my drivers were all up to date... I can't update my thunderbird (if required) because I can't get in in the first place. I have hundreds of emails in multiple accounts under my current Thunderbird. I can't afford to lose all that history. I don't know which version I'm using because, again, I can't get the desktop app to launch. What do I do?

Hello all, I'm getting "Authentication Failure" popups, even though Thunderbird works fine, sending and receiving. I researched various sources and all deal with Server Settings. All email addresses are correct with passwords.

But here is something I noticed: In account settings, left pane, under Server Settings, - Connection Security is set to SSL/TLS and - Authentication Methos is set to OAuth2 ... as usually recommended for both

However, going to the main window in account settings (same account), scrolling to the bottom, under Outgoing Server > edit outgoing server > Connection Security is: STARTTLS ...???

Is this maybe the reason of Authentication Failure? (different from Connection Security under Server Settings.

Any thoughts on that? Should both be the same? Thanks for now

Sorry if the acronyms are wrong. A friend is on Virgin email which is being hived off to a paying service. He'd like to keep the old virgin mail on his PC. And use a new gmail account instead.

Prior to the update to TB 153.5.1esr (on Linux Debian) all was fine. The update was accompanied by (caused?) a display that is huge, such that much of my content is off-screen.

I have a number of calendars subscribed in Thunderbird, some external ones along with my own one, One is an Awareness Days one. That is one I like to glance at daily, but at midnight GMT/UCT the blasted thing causes a whole series of notifications to pop up, one after another, one for each awareness day the following day is - and some days that's quite a few. It's incredibly annoying when I'm in the middle of something and am interrupted by the notifications. i want the calendar for me to glance at when i want to; I do NOT want the notifications from this calendar, but do for e.g. my personal calendar so can't globally turn off all TB notifications,

I have:

1 in calendar tab, in the list of calendars clicked on the mute icon so it's showing a bell with a line through it and says it is muted on mouseover.

2 In its properties> Edit Calendar, unticked Show Reminders, have nothing under the Add notifications.

3 Following a suggestion from the Google AI, changed TB to use its own notification display rather then the Windows 11 one.

But no effect: every midnight I get the damned parade of notifications getting in the way of the 3D CGI art I'm working on.

So how do I stop the notifications from that one calendar (other than unsubscribing from it)?

TB 158.0.1, but this has been going on for a long time and a lot of TB versions. Windows 11 Home 26H2

My email on Thunderbird no longer loads on my laptop. It's fine on my desktop. It just stays a blank screen. "No message found" it says. I have to shut it down and when I do it says "Thunderbird is not responding." Can you give me a step-by-step on how to fix this?

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

A couple of different emails always end up in trash despite having a filter. I deleted all my filters and all incoming emails ended up in my inbox with the exception of these two. So filters are not the problem.

michaeltsnyder@substack.com endtimesnews777@substack.com

The only common thing is @substack.com

Not sure where else I should look. Can you assist?

Hello, I’m trying to install Thunderbird email client for my IMAP domain and my POP domain. They are on the same server but different passwords. I don’t get a place to enter passwords. Why?

I activated the sidebar of my calendar to display the events. It works fine, but I'm missing the data of an serie of events.

Example: I made an events from Nov. 1 to Nov. 3, entire day. The sidebar shows me only the first and the last day, but it hides the others days - in this example Nov. 2. See attached screenshot.

The "full calendar view" shows this event correctly on all 3 days.

Bug or feature or wrong setting?

The option "Edit as New Message" is only available when a user right-clicks on the body of an email.

The option is not available in the menu displayed from the "More" button on an email. The option is also not available in the right-click menu on an email in a mailbox list. The option is only available in the right-click menu from the body of an email.

Requiring a user to use the right-click option in a specific area of the user interface is an accessibility issue which should be fixed.

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?

I am using Thunderbird as an email client. I have the option set to normally send emails as plain text. If I receive an email that is formatted and then reply, the email is composed as unformatted. I wan the reply to be formatted.

Is there anyway Thunderbird can detect formatting and automatically format the reply the same as received?

How can I reply to an already formatted email so that the reply is formatted?

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.

/storage/emulated/0/Download/takeout-20260225T235023Z-14-001 (1)/Takeout/Mail/All mail Including Spam and Trash.mbox