Thunderbird Community Forum

I have been using Thunderbird for a very long time. Today is the first time I have seen this happen.

In the column on my left side that has my account and folders for those accounts it is showing 5 in my junk account. But in the preview window to the right of that column there is nothing showing as far as any entries as junk mail. It is completely blank. What do I need to do to clear this 5 from the left column Junk folder??

I have tried resetting the machine and that did not work. I even went into the webmail site for my email provider and there is no junk email showing there at all so as far as my email provider goes, it looks like everything is working there.

Bob

For the past 2 days, either my inbox is empty on startup, or if I see my messages, they disappear completely once I open any folder. Also, I have over 2400 messages in Trash, and can't empty the folder. No settings or connections were changed. What gives?

I've recently switched from Outlook to Thunderbird, retaining my gmail address. I'm finding all emails sent to a bt email address either goes into spam, if cc, or rejected if bcc. I think this is bt issue for the receipts to resolve but is there anything I can do at this end?

I used to be able to copy links from Youtube and send them to people to watch. Now thunderbird is not letting me do that and says it is spam. This is so irritating as my bedridden sister loved to watch the things I would send her. Is there a way around the spam setting?

Just recently, some of the emails I receive are full of messages in red next to almost every line of the email saying that things like "Likely fraud detected" or "Do not trust this website." There is no indication as to what program is creating all these warnings. I have tried to turn off anything I can find in Thunderbird's security settings to no avail. The main source of emails with these warnings is "Beermenus.com" which I have been receiving for quite awhile before this started. Any ideas on what to do

OK, so I see where others Thunderbird users have previously asked about why e-mails are disappearing from their Thunderbird junk folder but have a quite different problem. So, when I go to my junk folder momentarily all the mails are present, but then right before my eyes 2 or 3 just simply disappear! They truly disappear and are nowhere in any folder on Thunderbird account -trash, archives, sent, etc. I did the obvious and Googled and there are some informative posts about Thunderbird settings for time-outs and filters and automatic deletion - BUT, BIG BUT all my settings conform already to all their suggestions on these various web posts. So at my wits end I ask the folks in the community if they have any explanation as to why e-mails in junk folder on Thunderbird literally just disappear in front of me. I would be greatly appreciative of any suggestions.

Hello, I get oftem spam mails with a header like the following: from:Singles50 subject:Momenti speciali insieme per gli over 50 Reply-To:reply_to@miracel001.entrydns.org>

I tried to create a filter adding as personalized condition "Reply-to" that Thunderbird saves in the msgFilterRules.dat as: condition="OR (\"reply-to\",contains,@miracel001.entrydns.org)"

There is no way to get any filter working, do you have a suggestion on how to fix this issue ?

Thanks

Since yesterday (27 Apr 2026) any and all mail that comes into Thunderbird gets marked as SPAM. I searched online and found people saying that I could reset the junk training filter, so I did this, but incoming mail was still marked as spam. The next suggestion was to delete the training.dat file. Did that, restarted Thunderbird and incoming messages are still marked as spam. The last suggestion was to turn off adaptive junk mail controls. Didn't want to do that because I assumed that it would let spam through. Nope. Turned it off, restarted Thunderbird and two emails from my work came in and got flagged.

I'm running version 140.10.0esr (64-bit) on Windows 11. I am using IMAP to connect to the mail server but it's not running any spam detection software (like Spamassassin). I know this because it's my server and even if it was, no updates have been preformed since the first of this month and this just started happening yesterday. Combine this with the bug that Thunderbird notifies me of incoming mail, even if it's spam (didn't post about this because there are plenty going back a couple of years), is starting to make me look for an alternative.

What is an easy to use anti-spam program for Thunderbird that will allow me to easily mark new messages "block sender" or "block domain?" My e-mail host InMotion and their Spam Assassin does not support quick and easy marking of new messages.

I'm concerned I've got my Junk set up so that TB is not actually learning what is spam, plus spam is not easy to delete.

First question. What is putting [SPAM] in headers before emails arrive? Is it SpamAssassin? I use my own website/email address and my host uses Spam Assassin. My host in addition has their own native Bayesian spam, but that would use *****SPAM***** headers and I never get these.

The problem is this. Most junk arrives marked [SPAM] but doesn't go in the Junk folder, which is the only folder with one-click Empty Junk. So I have filters set up to direct headers with [SPAM] in into the Junk folder.

(i) the [SPAM] arrives in the Junk folder not marked as Junk even though the filters are carefully set up to "Set Junk status to: Junk"

(ii) it doesn't seem possible to bulk mark the contents of the Junk folder as Junk. If I click the flame icon in the header row once, then all the flame icons are switched to not-Junk as expected. But if I click it again then only some, not all, are changed back to Junk. IE completely different from normal all-off/all-on conventions.

(ii) some [SPAM] ends up in the Spam folder despite the filters. This looks like pure filter failure.

The goal is the get all the [SPAM] messages in the Junk folder along with the Junk the TB itself puts there, so (a) I can delete them with a single click plus (b) all marked as Junk so the TB is learning from the [SPAM] emails.

How can I do that please? What am I doing wrong?

Many thanks.

I recently upgraded to TB 128.14 Oesr (64, Win 10). I’m a bit conservative about upgrading anything – as upgrades often waste a lot of time – if not risk justified.

Basically, If it’s workin’ well enough (cost vs benefit) …… well … “don’t fix it” – even though … “if it ain’t broke, doesn’t mean it isn’t sub-optimal”. Here, it seemed worth the risk.

My prior TB version – nope, I don’t remember which it was (is that in a log?) incorrectly identified bookoo normal e-messages as “junk” (junk filter deactivated) wasting a LOT of my time to move them back to the “indox”.

It also – CORRECTLY ID’ed – a big lot of data sucking spam as “junk” (junk filter still deactivated) for my PUBLIC e-address (expected spam magnet) – alerting me of the quantity of (expected) spam I was actually getting (my free Omaha steaks are on the way).

After upgrading (to TB 128.14) I don’t get any, well much of that spam any more (got a couple today) – hurrah (maybe)!! I don’t see it any more. It is gone completely (mostly, ostensibly) and the problem is – I do want to SEE it – all of it – in a “spam folder / directory” nd not in trash– wherever it is – to make sure it is NOT mis-ID’ed as spam – when actually an important message maybe telling me I’ve won the FIFA email prize!

So … “the game is a’foot! Holmes! How can I track down that missing spam – to see ALL of it – to verify it’s identity?

I suspect my hosting company – Hostinger – may be involved – as I did verify, previously, with my previous TB version – that they COULD see into my TB account structure. Can’t find it now, but previous did see MY TB account named “Aviation”. They, Hostinger, said THEY aren’t “moving” anything anywhere – not into “Junk”, anyway. Are they lying (as popular as that has become recently)?

I’m not smart enough to understand DKIM (though I could get that way) just want to see ALL email sent to ALL my e-addresses that didn’t get there – wherever it is (not immediately, I would hope)!

Merci,

Dru

When I click "Empty Trash," the trash is emptied. However, the status indicator (number of emails) remains unchanged until I click the trash icon again. Is there a missing "Refresh" function?

I have turned off every junk filtering option in Thunderbird, globally and for each account, yet the application started and continues to mark nearly every incoming email I receive as possible junk -- even emails from MOZILLA... It is not my ISP, nor my email provider, as they are not filtering junk, either. The banner on the preview window says "Thunderbird thinks this message is Junk mail", so that tells me it is THUNDERBIRD that is doing this. How can I get the app to stop??? There are no helpful conversations in the forum, since I've tried all of the solutions that were presented. I'm about to just delete the app and use something else which is a shame since I've been using Thunderbird for probably 20 years, but I cannot continue if this problem does not stop.

I'm a bit lost with the instructions http://mzl.la/1BsOG2o My thunderbird looks different I don't see a "Trust junk mail headers set by" option. What would be the proper way?

I am on Ubuntu 22.04.5 using Thunderbird 140.7.1esr (64-bit). After the latest update (from 128.12.0+build1-0ubuntu0.22.04.1) the notifications for mail has changed. Instead of just getting a notice, the notice now allows me to mark as read right within the notification (which is cool), but also now I am getting notifications when Junk mail comes in. Not a notification that it's junk, just that it is a new email.

I do *not* want these to automatically get marked as Read when they come in, as I do want to manually review them in case it's a mistake, and leaving them as unread in my Junk folder makes sense to me in order to make that easier. However, I do not want these notifications on each and every mail. If it's junk it should just silently classify it as such, like it used to. However, I cannot find a setting for this. is there a way to revert to the old behavior without rolling back to an earlier version of Thunderbird? Thanks!

Last week my Inbox started showing TWO (2) unread messages, but I cannot find any unread messages in my Inbox. My SPAM folder is also showing two (2) spam messages, but there is only one spam message in the folder.