Thunderbird Community Forum

Hi, I have a problem with hundreds of Casino type emails filling up my spam folder so I asked AI for help. AI suggested I change my mail handeling from Standard to Strict. Ever since then it will not stay on Standard, it keeps reverting to Strict every time I try to revert it back, therefore all my wanted emails go straight to Spam. I need to check through heaps of Casino emails and take out my wanted emails which is so annoying!! How can I change it back so as it stays changed? I will not ask AI for help ever again, it was working fine until I changed it. Ugh.

I am not sure how to find out what version Thunderbird is, how do I find out please. It should be up to date as I have everything set on automatic up date.

I use an HP Laptop, windows 11.

I read that "Once a message is marked as junk, it will disappear from the main inbox view and be relocated to the specified junk folder." However, that does not happen. Once I mark a message as spam, it just has a red mark next to it and I have to go to Tools and have it "delete mail marked as spam from folder".

As of two days ago, all of my incoming messages are going directly to the Trash folder.

On Thunderbird, I've deleted all my message filters, and disabled adaptive spam filter logging. On my webmail provider, I've deleted all filters there and checked for any changes that might be responsible (there are none). None of this has fixed the problem.

I have a POP account, if that's relevant. Please help! Thank you.

My Charter.net mail has suddenly started to come into my inbox and automatically is moved to trash by Thunderbird. I do not have antivirus, i have not changed any settings, it is POP.

I can't find my Junk folder on any of my three Thunderbird email accounts. I tried everything from the Thunderbird and Internet search pages but nothing brings up my Junk accounts.

My problem is that all emails to one of my email accounts goes to the Trash folder, Every time now starting this morning, The two other email accounts work properly.

Please help. Thanks.

Yesterday, 4 Sept a problem developed with my Thunderbird email, namely, when new messages were received they went directly to trash and not to my inbox, i have not tinkered with any settings, The program is on an ASUS laptop, operating Windows 11 pro.

Advice on how to fix without losing all my mail folders thank You Kenneth E. Smith

1) How do I get the emails Thunderbird marks as spam to be moved to the Spam folder without me doing anything. I have thousands of emails now most marked as spam but I have to go in and move them one by freaking one!

2) Also you freaking filter system doesn't work worth a crap! I have created filters for instance: for any emails that have @cypress.com in the From part of the message to be moved to a folder under my inbox named Cypress. I have run it many times and actually none of the filters I've created work? They are very simple to understand and I am doing them correctly as far as I can tell but they don't work. I have created at least a dozen filters and the only emails moved are ones I moved manually myself.

And this training crap you have I don't know what you think it should take a computer to learn to move something to a folder. It's not like a child that has to be taught how to spell. You tell it if it has this in whichever field you've selected then it should move it. Not have to be taught? Not a bright idea in my opinion. It's why AI isn't very smart at least what they release to general users. Anyway I digress.

If you can help me with the above issues in the above paragraphs 1 & 3 I would greatly appreciate it.

Hello, In our WordPress website, we have a page dedicated to our contact form. I have it connected to the email I have in Thunderbird so I can receive the forms; however, I keep getting the error of:

Mailer: Other SMTP SMTP Error: data not accepted. SMTP server error: DATA END command failed. Detail: Your message has been rejected because you have been detected sending high likelihood spam.

I saw online that I have to contact Thunderbird to resolve this issue since they are the SMTP provider. Please let me know what I should do.

(Note: I am not a coder so if I need to do any coding, please specify where I have to go and what to click)

Thank you

This post is to inform others that release 153.1.0esr finally fixed this previously unresolved issue with spam filters in unified folder mode for me. Up to 140.14.0esr the problem persisted.

I cannot see any other relevant variables in my setup that would have changed concurrently so I am assuming a now fixed underlying software bug as the cause.

After first pressing "Mark" (K), the shortcut keys for "Mark as Junk" (S) and "Star" (S) are the same. Previously, the shortcut key for "Mark as Junk" was (J). Please make the necessary corrections.

最初に「マークを付ける」（K)を押してから、「迷惑マークを付ける」（S）と「スターを付ける」（S)のショートカットキーが同じです。 以前は迷惑マークのショートカットキーは（J)でした。

修正願います。

Some time ago I went tinto exceptions and put in some unwanted email addys and they were blocked. I am getting unwanted emails tried the same thing, but they are still coming through. Here are some of the emails; contact@news.comoundeesgtream.com contact@news.musteraliteinfo.com

Can you tell me how to block these from showing up in my email account? John @ redacted@outlook.com

I use to be able to mark email as junk by right click then K then J. The junk option is not there any more but spam is. The problem is both add star and as spam are both S, so K - S does not work. Need to change one of them to a different letter.

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.

All e-mails from Pay pal go into trash. Have marked as Not Junk but this has not helped. Needed e-mail from Pay pal today to pick up a click & collect order but didn't receive any e-mail. Tried to log in to Pay pal on Android phone not desktop PC as I usually do. Kept sending codes to my e-mail address to log in but I received nothing. Wasn't until I had come home and accessed Thunderbird on my PC that I found them all in the Trash. Luckily store gave me my order and I didn't have to go back.