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Since some time late last night (so about 16 hours ago at most), my Thunderbird account started processing filters incorrectly on incoming emails. A number of legitimate emails were detected by filters I had set up, and deleted, although they did not appear to meet any of the criteria I put in the filter. On editing the filters, I did find some with a criteria active on the 'from' address, containing, and with a complete blank in the text box. I am not sure if this meant they were picked up by the rule, but I deleted all lines with blanks in them. Following this, some emails were still being processed as meeting the criteria of the rules, although they did not. It does now appear to have settled down, but instead, messages that I personally deleted, are not appearing in the 'deleted emails' folder until after I close down Thunderbird and re-open it again. (which is a little confusing, but I am coping). At this point I do not need any assistance, so long as this strange behaviour stops happening, but I was trying to work out if it was something in my Thunderbird programme awry, or something at the mail server, and I have not been able to confirm either, so thought I ought to let you know. I usually install Thunderbird and Firefox updates as soon as they are available when the programme notifies one is available. I do like the appearance and function of Thunderbird, and appreciate what you do - Thankyou. Best wishes, David Church

I've recently started having an issue where emails sent from my email account are being delivered, but some of them are ending up in the recipient's spam folder.

I'm using Thunderbird and the account itself appears to be working normally. I can send and receive messages without seeing any obvious errors.

I've already checked the SMTP settings, but I'm wondering if this could be related to my domain's email authentication rather than Thunderbird itself.

What should I check for SPF, DKIM, and DMARC, and is there a good way to determine whether the problem is with Thunderbird, the mail server, or the domain's email configuration?

Block advertisements in my emails, I hate this advertisements they pop up everywhere, when I type subject in my emails instead of to appear the subject contect the gambling advertisements will pop up it is very frustrating

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.

I have been using Thunderbird since its inception. I have noticed a pattern recently where more spam and phishing messages present encryption when I "view source". Normally, the text is visible.

Just curious regarding their technique, how that works and whether it can be resolved.

I can send you a copy of the message if you are interested. It is the classic DocuSign scam.

Some good E-mails got moved into junk, so I right-clicked them and marked them as "not junk." Seconds later, they reappeared in the Junk folder.

Also, Thunderbird continues to classify messages from the same sender and even the same thread as junk. I read the doc here: https://support.mozilla.org/en-US/kb/thunderbird-and-junk-spam-messages#w_tell-thunderbird-what-is-not-junk

and the behavior is not consistent with what's described, or what anyone would expect.

Is this a known bug?

Thanks!

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.

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

Hello Thunderbird Support, I am experiencing a severe IMAP folder synchronization loop with my Yahoo Mail account ([redacted]@yahoo.fr) inside Thunderbird. Yahoo Support claims the issue is caused by Thunderbird's folder mapping, so I am reaching out to you for a solution.

1. 1. The Problem:

The system-protected folder "Bulk" (Spam) has somehow been moved or mapped as a subfolder inside the "Trash" folder.

• In the Yahoo Mail Web UI (Chrome), the subfolder is invisible, but the Trash directory shows an arrow (^) indicating a child folder exists.
• In Thunderbird, the Bulk folder is clearly visible inside the Trash folder, marked with the flame (Junk) icon.

1. 1. What goes wrong:

When I delete spam messages via Thunderbird, they get trapped inside this nested Trash/Bulk directory. If I try to delete or empty it, the emails disappear but the folder itself cannot be removed.

1. 1. Steps tried so far that failed:

1. Attempting to delete or rename the Bulk folder inside Trash gives the server error: [CANNOT] DELETE failed - Mailbox is reserved. 2. Using Shift + Delete on the folder is rejected by the Yahoo server. 3. Unsubscribing from the folder via "Advanced IMAP settings" -> "Show only subscribed folders" fails; Thunderbird re-downloads the structure on the next sync. 4. I have completely deleted my old Thunderbird profile folder and created a brand new one using thunderbird.exe -P. Upon adding the Yahoo account via OAuth2, Thunderbird immediately pulled the same broken Trash/Bulk structure from the server again.

Since Yahoo refuses to help and claims Thunderbird caused this mapping loop, is there a hidden config setting (about:config) or a database override in Thunderbird that can force the server to release or move this reserved folder back to the root directory? Thank you for your assistance.

Using version 154.0, all of my incming emails are going into my spam folder and my inbox is completely empty. I have turned off the spam assassin filter and the adaptive spam filter, but the problem persists. If I move a message from the spam folder to the inbox, it goes back to the spam folder within 3 seconds. I know that this is a Thunderbird issue because I uninstalled it and used my browser to access my email from my provider (runbox.com) and my inbox functioned correctly then. After I reinstalled Thunderbird, it somehow retained all of my settings and the problem persists. Is there a way to fix this?

So my question for the community is : why did this happen all of a sudden today and Why can't I delete or remove it?

Tried re-starting the app. Did a pc re-boot.

I always train the junk filter by marking mails that are erroneously sent to the spam folder as "Not Junk". They are transferred back to the Inbox as one would expect, but after a few minutes some (not all, but most) are again moved from the Inbox to the Spam folder. This happens repeatedly every time I mark these legitimate mails from addresses that should not arouse suspicion anyway, such as theguardian.com (an address that is in my address book, so should be whitelisted anyway) or Arri.com, just to name two current examples. Why is Thunderbird overriding my "Not Junk" flag? How can I train the junk filter if Thunderbird ignores this? Is there something in the Settings I'm missing?

I'm getting Spam Emails from about 10 regular Spam Accounts and I wish to Universally Block them by adding Them to my Filtering Lists. I'm using the * Character as a Universal Place Holder for the *@*.com, *@blah.blah.ca or com. The Filter works one Time then stops working for any fresh Spam. In other words, the Filter doesn't Filter any new Spam from these Addresses. Why?

OPERATING SYSTEM Windows 10 Professional (x64) Version 22H2 (build 19045.6466) System Model : HP HP ProDesk 600 G3 DM SYSTEM MODEL HP HP ProDesk 600 G3 DM Enclosure Type: Mini PC PROCESSOR 2.80 gigahertz Intel Core i7-6700T 256 kilobyte primary memory cache 1 megabyte secondary memory cache 8 megabyte tertiary memory cache 64-bit ready MEMORY 15.88 Gigabytes Usable Installed Memory BOARD HP 829E KBC Version 06.29 STORAGE 4.51 Terabytes Usable Local Storage Capacity 3.59 Terabytes Local Storage Free Space

• Waterfox - 6.6.12 (64-bit) • Thunderbird - 140.13.0esr (64-bit)

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A few days ago the left (file) pane went from

- InBox
- Drafts
- Sent
- Junk
- Spam
- Trash

to

- InBox
- Drafts
- Sent
- Spam
- Spam
- Trash

I attempted to change the first "Spam" back to the original "Junk"; didn't work. Have no clue why TBird decided to change the file names on its own.

Any information/direction(s) about how to correct this back to the original?

Thank you / appreciated. Nels