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TB Windows puts some messages in my spam folder even though I've put the addresses in my contacts and told it to check contacts before moving them to spam folder. It would be nice if the "Spam" button became a "not Spam" button.

I just installed the latest Thunderbird 146.0 Win 11.

Configured my server data and Spam settings, etc. Mail coming in and going out OK.

Now I see some messages in the Spam filter that are not Spam. So I click on "Not Spam" button, and the message goes into my Inbox. Great. But after 3-4 seconds, the message is thrown back into the Spam box. I've told it 10 times "Not Spam" and each time it gets moved to the Inbox. Then 3-4 sec later it gets thrown back to the Spam box.

What am I doing wrong? Am I missing a setting?

Hello, I am a very long time user of Thunderbird Mozilla for my personal email account. Recently, almost all the emails in my Trash folder were deleted. I did not do this. Can I get the last 6 months or so back please? Thank you. Tim Cimperman cody46@zoominternet.net

I have had an online newspaper subscription for quite awhile and suddenly the paper stopped coming, soon after I had paid for another year. I emailed the company and they said to "check my spam folder" but I want all spam to come to my inbox so I can see if it is really spam. I also got emails from a scrapbook company I buy from frequently and those emails have stopped coming also. I am wondering why those emails are no longer coming through, and if there are other emails that also are no longer arriving that should be coming to me. And how to get them to come again? The newspaper is Casper Star Tribune <trib.com> from Casper Wyoming The scrapbook company is Echo Park Paper Co <Echoparkpaper.com> Thank you for your help it is much appreciated,

Hello,

I am requesting immediate assistance with a critical and persistent problem in Thunderbird.

For my Google Workspace account max@dantanas.com

, Thunderbird refuses to create or recognize a Junk/Spam folder. This is not a cosmetic issue — it directly affects email safety, filtering, and daily usability.

Summary of the Issue

Thunderbird does not automatically create a Junk or Spam folder for this account.

Attempts to manually create a Junk or Spam folder fail or are ignored.

Thunderbird’s junk filtering settings for this account are disabled or inaccessible, making filtering impossible.

Other clients (Gmail web, Outlook, mobile apps) create and use a Spam folder normally, which shows the problem is specific to Thunderbird.

This problem has persisted across restarts, folder repairs, and full account removal/re-addition.

Why This Is Critical

Without a Junk/Spam folder, Thunderbird cannot move suspected spam anywhere, leaving the inbox vulnerable.

The built-in adaptive junk filter becomes unusable.

Thunderbird does not comply with Gmail’s standard IMAP folder structure.

This issue prevents Thunderbird from functioning as a secure, reliable mail client for this account.

Steps Already Attempted

Removed and re-added the account multiple times.

Forced folder synchronization.

Repaired folders.

Reset folder permissions in Gmail.

Verified IMAP settings (X-GM-EXT-1, special-use flags, etc.).

Tested other devices — only Thunderbird fails.

Expected Behavior

Thunderbird should automatically recognize Gmail’s [Gmail]/Spam folder as the Junk folder OR allow me to assign one manually.

Instead, Thunderbird behaves as if the account is not permitted to have a Junk folder at all, which is incorrect and breaks essential functionality.

Request

I need help determining:

Why Thunderbird is refusing to create or map a Junk/Spam folder for my Google Workspace domain.

Whether there is a known bug with Gmail Workspace integration that causes Junk folder support to fail.

How to force Thunderbird to recognize or create a valid Junk folder.

Whether this issue requires special IMAP flags, folder mapping changes, or intervention from Thunderbird developers.

This is not a minor inconvenience — it prevents Thunderbird from acting as a secure or usable email client for this account. I would appreciate prompt assistance or escalation.

Thank you, Max Makowski max@dantanas.com

Up until today I have been able to send emails(with attachments) from my laptop to my cell phone. Now when I want to send an email I receive an error message saying" An error occurred while sending mail. The mail server responded:(VO-1)Message blocked due to spam content in the message. Please check the message and try again. I tried several times since and the same result. Thank you.

I keep receiving the same or similar spam emails which I have already marked as Junk. I assumed that by doing so, Thunderbird would 'know' to send those directly to the Junk folder, but these emails still appear in my Inbox. How to train T'bird so that new emails I have previously marked as Junk automatically go to the Junk folder (it would then be up to me to check this folder if needed)?

I have a Macbook air, T'bird shows up to date (v. 140.5.0esr (aarch64), Junk settings: Enable adaptive junk mail controls for this account, Move new junk messages to: "Junk" folder on Local folders. Many thanks.

Emails from those that are in my addressee book are being sent to the Spam/Junk folder and I am having to go through that folder and get back to the inbox. I have marked them as "Not Spam" for weeks, but they still continue to end up in that box. Even messages from President Trump and Western Journal are being sent to the Spam/Junk folder. I don't know what you did to the algorithm, but it really messed up my incoming emails. Please fix your algorithm or delete it and allow the users to set the trend for which are Spam/Junk and which are good emails.

For years now, every time I get a suspicious email claiming to be from Breezeline, I FORWARDed it AS ATTACHMENT, and it's gone on its way with no problem.

    For the last three suspicious emails, when I FORWARDed it AS ATTACHMENT, I get a message that it failed to send because the notice has spam in it: it's labeled VO-1.
    My first question is: how do I FORWARD AS ATTACHMENT a notice that is spam when Thunderbird won't send the FORWARD AS ATTACHMENT because it has spam in it?
    My second question is: Do you solve this problem, or do I have to communicate with someone else?

When I try and "Compact" my trash folder, I get the following error message: "The folder 'Trash on redacted@gmail.com' could not be compacted because writing to folder failed. Verify that you have enough disk space, and that you have write privileges to the file system, then try again."

There is plenty of disk space, but there is no option for "write privileges". The trash folder has grown to 632 MgB even though I keep deleting old messages from the trash folder!

I keep getting 30 to 40 messages in my junk folder every day that are not junk or spam. I keep moving them to my inbox folder but many of the same messages keep going to the junk folder.

Running version 145. Trash/Junk processing has been named SPAM. I have never had any SPAM folders. Where do the deleted notes go? Why the change? How do I setup the SPAM folders so that they function. Lets have some consistency in naming and processing. Why when the update/new release is installed does it not retrofit folders. You are confusing me with your gratuitous changes. I am not a computer expert.

Regards,

I just upgraded to Thunderbird 145.0 No longer have Junk Control Filter or any junk folders. Has this been replaced with Spam Control Filter? Do I need to reset training data this or does it use the old Junk controls?