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Yesterday Thunderbird worked just fine. This morning I tried to respond to several emails and got this error message: Sending of the message failed '"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."

There was no spam in the person's email... just text.

Next I tried to send a freshly created email with just a YouTube video... then the last half of the error message said: An error occurred while sending: RBL restriction: Blacklisted by Internal Reputation Service - 195.181.168.179

What is going on??? The SMTP settings are correct: Port 587 STARTTLS Help!!

Hello: I send out newsletters to about 100 senior men golfers. I've been struggling with my messages going to spam or junk folders. My messages don't contain spam, but some mail servers are rejecting them. I've been working the problem (proper server authentication, DMARC, SPF, DKIM, etc.) but one of the suggestions I've read is to make sure there's an "list-unsubscribe" link in the email header. I've placed one in the body of the email at the bottom of the page (still fails), but how do I make a header in Thunderbird in which to place a link? Thanks for any help.

I love Thunderbird, I think it is an excellent product all round, but one thing that really, really niggles me is that it continually marks certain senders as junk.

I receive Emails from these senders all the time, and often miss Emails because Thunderbird has marked them as junk, and moved them to the Junk folder, which means I don't see them on my mobile devices (IMAP).

I've marked this sender as "Not Junk" at least a thousand times. Each time it accepts my tag, and moves the Email back to the Inbox. However, that doesn't last, as the next Email, or the one after, or the one after that, ends up in Junk again.

I've seen a few posts that protest - this is not Thunderbird's fault, it's your Email provider, but I've already crossed that one off the list as I have white listed the entire domain at the Email provider. So nothing is getting flagged from the Email provider, to hint that it might be junk.

I'm always on the latest version of Thunderbird, and I have adaptive junk filter logging enabled, but it is completely empty of any logs. I also have "Do not automatically mark mail as junk if the sender is in "collected addresses" & "personal address book". I have a number of entries from this domain in the personal address book, as well as *.@domain-name.com, though I'm not sure if that format is correct to capture the entire domain.

Any help on this matter, gratefully received.

M

Fix the problem; how can I see all that are in the trash folder? I need to be able to delete the oldest ones and access those sent there recently in error. The display says there are over 900, but I can only see nine and the dates are not the most recent nor the least recent nor consecutive.

I am trying to whitelist a domain name. TB won't let me do that. This company has a plethora of emails. I don't want to whitelist every single one of them. That would take me days. It is impractical. I want to whitelist the domain name which is concentrix.com. I want to ensure that all emails coming from that domain name land on the inbox folder. How can I do that on TB?

Hello, All of a sudden when turning Thunderbird on, I have found that all messages in my Inbox have gone ( except a few for last day or two). Looking around Thunderbird I have found all Inbox emails have bee dumped into my Trash folder! Please help - how can I get emails back where they belong and get Thunderbird back into working order? Very grateful for any help' Thank you, kindest regards Brian Benger PS where will I get your reply if my email not working??

Right now when blocking a sender the deleted message go to "Trash".

How can I do a "hard/permanent delete"(Shift+Delete) when blocking a sender? Can this be done so that it bypasses the Trash and is permanently deleted?

Hi, until recently I used to get a reply-mail from my affiliate partner in my Thunderbird mail, but it's not working anymore.

I am trying to find a spam folder where I can check and possibly exclude that?

Please, help. Thanks.

I don’t want any spam filters from Thunderbird. “Uncheck Enable adaptive junk mail controls for this account” never worked. https://blog.thunderbird.net/2024/09/thunderbird-and-spam/ The message "Thunderbird thinks this message is Junk mail" still appears. I’ve deleted Bogofilter.sfd, DSPAM.sfd, POPFile.sfd, SpamAssassin.sfd, SpamPal.sfd from Thunderbird.app/Contents/Resources/isp. What else do I need to delete from Thunderbird to get rid of the message "Thunderbird thinks this message is Junk mail"? I’m using Thunderbird 128.9 ESR on macOS 15.4.

Hi. Somehow, in Thunderbird Mail, I moved the "Bulk" folder into the "Trash" folder and now I can't reverse that. Some of my mail is going to the "Bulk" folder and I'm forgetting to check that, thus missing emails. Is there a way to move that "Bulk" folder back where it belongs? thanks in advance

Hello,

I need assistance with a very specific Thunderbird issue.

I use Thunderbird with multiple email accounts. Every one of them has a functioning Junk/Spam folder except for one: my Google Workspace account max@dantanas.com

. This is the only account where Thunderbird refuses to create or recognize a Junk/Spam folder, and the option to assign one is disabled.

I am not looking for general explanations about IMAP, Gmail, filters, server policies, or Thunderbird’s junk logic. I need a concrete, step-by-step procedure that results in:

A visible, usable Junk/Spam folder for max@dantanas.com

inside Thunderbird.

Thunderbird recognizing that folder as the Junk folder.

The Junk settings becoming available so the account can move spam to that folder like all my other accounts do.

To be clear:

All my other accounts in Thunderbird already have functional Junk/Spam folders.

The problem is isolated to this one account.

I need an exact sequence of steps that I can follow to fix it, not abstract descriptions or background information.

Please provide a direct, step-by-step set of actions that will enable Thunderbird to create or use a Junk/Spam folder for this account.

Thank you, Max Makowski max@cape-co.co max@luck.fish

I'm getting very frustrated with important emails being put in the junk folder. Nothing I have done prevents this behavior.

+ Sender is in address book + I have NO filters + Mail server does not have filters + Enable adaptive junk mail controls for this account -- OFF + Trust junk mail headers set by: -- OFF + Move new junk messages to: -- OFF + Global junk settings

  When messages are marked as junk: -- OFF
  Mark messages as read
      When manually marked as junk -- OFF
      When Thunderbird determines that they are junk -- OFF

Enable adaptive junk filter logging -- OFF [ Reset Training Data ] -- pressed many times, no noticable effect

Thunderbird gives me the error "The current command did not succeed" if try to delete my junk folder.

I'm at my wits' end and ready to dump Thunderbird for something else. This is obnoxious and has caused me a lot of grief with missed important emails.

Is there a definitive way to turn this "feature" 100% off or is it time to ditch this app?

I am running Thunderbird 140.6.0esr on a Windows 10 desktop PC. Yesterday I was accessing my inbox and had a problem. I marked a message as Junk in the message bar. My virus software, TotalAV, flashed up a Red message box say HTML issue - Junk. Following that Thunderbird gave a message saying Junk folder full and greyed out the button on the Message bar. Then the Junk folder disappeared from my folder list and now pressing Junk for a message causes no action. Before the Junk folder disappeared it had 2 unread messages.

My Junk settings say "Junk" folder on: my account name.

I do not know how to proceed. Please help.

Thunderbird 143.0.1 eclipse.

Quite recently I noticed that, in the list of folders, I see 2 "Junk" folders.

On looking at the properties for 1 Junk folder the location is shown as "imap://*********%40gmail.com@imap.gmail.com/Junk",

but properties for the other shown as Junk locates as "imap://*********%40gmail.com@imap.gmail.com/Spam".

I've tried renaming that folder in Thunderbird to Spam but the change doesn't take effect.

What went wrong, and more importantly how can I rename it to see it as "Spam"?

tnx.

Hi, I'm talking about a POP account. Every time I empty the trash, either manually or by exiting Thunderbird, the "Trash" folder is being silently deleted, and from that moment on I cannot any longer delete messages, receiving a "not enough space" error. If exit the program, and trash is set to be emptied on exit, the next time I reopen Thunderbird there is no "Trash" (Cestino in my language, I have Thunderbird in italian) folder. In my ThunderbirdProfile\Mail\Local Folders the file "Trash" of 0 byte, keep being silently deleted. To restore correct functionality, I just have to create a new "Trash" folder under "Local Folders" in Thunderbird, then a new "Cestino" folder appears, and everything is fine. But the next time I empty the Trash, the problem reappears. I suspect something linked to Windows 11, computer was recently upgraded from Win 10 to Win 11. I tried with latest version 128.7, both 32 and 64 bit. As you can see from the screenshot, after emptying Trash, the 0 byte file "Trash" is missing. Thanks Antonello

I have attached a screenshot of my Thunderbird. You will see that in the Junk section there is a Hotmail folder with the same icon as Inbox. The contents of this folder is actually the same as Inbox. If I "empty junk" the contents of my Inbox get deleted. How do I remove this duplicate Inbox from the Junk section? Although it doesn't really matter, how do I remove the duplicate BT Internet junk folder?

I was searching for an email that I had just deleted and discovered that the Trash folder connected to my inbox was empty. The one connected to my Local folders, however, was not. I cannot find a setting that would instruct Thunderbird on how long to save emails in the Trash folder and am sure I did not accidentally change anything. Any idea how to fix this?