Thunderbird Community Forum

1. I am getting Mozilla Thunderbird ESR notices pop up when I log on to my PC (W11). I checked my Thunderbird version and I have 146.0.1 and I am on the release channel so why am I getting these notices ? 2. Recently I noticed that when I try to move e-mail messages to a specific folder, I right click on the message and get the prompt Move To and then Recent Destinations where the problem exists. The list of Recent Destinations used to be in alphabetical order and now it is sorted by most recent destination time. This slows me down considerably. Please revert. Thanks !!

Why did retrieving messages suddenly stop. It was working yesterday and I made no changes to anything. I can send successfully. I am using Shaw/Rogers Pop server.

Why does "test connection to server" fail?

Just installed TB 147 under Windows.

Previously, there was a menu item File/Compact Folders (plural).

It is now (at least on my machine) replaced with File/Compact Folder (singular), which only compacts the currently active folder. I cannot now find a way to compact all folders at once.

What am I missing?

Hello, I am wondering why mail that is 'Junk' and appears in my 'InBox' rightfully marked as such, still shows up, in my "InBox". Why doesn't it immediately get transferred to the 'Junk' Folder, like it use to? Or is there now something that else I have to do, after marking it as 'Junk'? In time past, as soon as I marked an item as 'Junk' it would transfer to the 'Junk' folder immediately. Why does this no longer happen?

I've recently installed Thunderbird and configured it to connect to a few of the email accounts I've setup. For gmail servers, everything seems to work fine. For a locally run hMailServer server, I can connect, download messages, and even send messages - sort of.

When I try to send an email through the hMailServer account, the message sends correctly: it arrives at the other address quite quickly, and I can see in the server's logs where it connected via SMTP, transmitted the message, received a "250 Queued" response, sent QUIT to log off, and got the "221 goodbye". However the Thunderbird UI itself never progresses past the Sending Message dialog: the status stays at Sending message... and the progress bar is full. I can hit cancel and it prompts to delete the draft, etc., but either way, the message has been successfully sent. This doesn't happen with other accounts, so I'm curious what I need to do to get this to go away or send correctly....

I'm using Thunderbird 147.

Purchased new laptop. Used export tool in Thunderbird to external HD. Traded in old laptop. Installed Thunderbird & attempted to import my email profile. Import tool requires zip file, but the only file on my external HD is a .default file. I'm getting new email but none of my old emails. Consulted Best Buy Geek & he determined the import tool didn't work properly because the export was missing required files. We further determined the export backup must not have worked properly.

1. I've drafted an email, then hit save / closed the email and opted to "save changes". 2. I try to edit that email, but it is just "flashing" in the preview screen. I right click on it to "edit draft message", but that just brings up a blank email. 3. The status in the bottom left of the screen shows "loading message..." "downloading message", repeatedly. 4. It was working fine earlier in the week, but Thunderbird Desktop Version 140.7.0esr | Released January 13, 2026, seems to be when the problem started?

I use Thunderbird 115.18.0 on a Windows 7 machine. I wish to transfer all my Thunderbird data to a machine running Linux Mint 21.3 which has Thunderbird 128.12.0esr. I have not been successful after many tries. Could this be because the Thunderbird revisions are different? If so, can I get 115.18.0 to install on my Mint machine? If not how should I proceed? I have already tried creating a new .thunderbird directory with ********.default directory from the other machine. I have also tried a new .thunderbird directory with a the ********default-release directory as directed by one site.

I changed settings to no threading, but it continues to show the thread column in all the folders and do threading unless I manually remove the threading column from each folder - very time consuming. How do I get rid of the threading column globally?

Hi there! I and my colleague encounter some bugs with Thunderbird and we would like to seek your advice in regards of the issue.

1. <user a@citizen-systems.com.hk> was supposed to get a cc copy of the email sent by <user b@citizen-systems.com.hk> at Mon, 12 Jan 2026 09:35:19 +0800 but it never reached. The receivers, namely <user c@systems.citizen.co.jp> and <user d@citizen-systems.com.hk>, however, were able to get the mail. <user d@citizen-systems.com.hk> and <user a@citizen-systems.com.hk> are working at the same office and under the same network. Network provider checked the protocol, router, traffic and firewall are working as normal.

2. <user e@citizen-systems.com.hk> found a number of emails that she kept at "Inbox" disappeared on 12 Jan 2026 morning +0800.

She is unable to find it anywhere at her whole mailbox but has to ask the senders to resend them to her.

It would be very much appreciated if you can check and advise how to prevent the issue from happening again.

(PII redacted by moderator)

I have the same original problem as https://support.mozilla.org/en-US/questions/1508740 , and from the same time period, but across 4 of 5 email addresses, with additional problems. All given answers then & now on this website have completely failed me.

I have 4 emails on the same server, which use IMAP, so there is no way for me to adjust any msg retrieval settings, because they don't exist. Surprisingly, one of these 4 emails actually does work in sending & receiving, but I got different error with it, just now! I also have one gmail affected by this original 2 year old problem, as well.

Closing program, restarting computer, and downloading TB updates all do not work. I uninstalled/reinstalled TB, and all of my profiles & emails were surprisingly intact with no deletes (yes, I backed them up in another folder first), and the problem persists upon reinstall of TB, on the exact same emails as the original problem. Antivirus & firewalls are off. Server said it wasn't them. I'm using Windows 11, McAfee antivirus, and the newest TB dld is Eclipse.

There is no distinct alphanumeric error message for the oldest problem, just the usual "Login to server with username failed. Retry/Enter New Password/Cancel." All passwords are correct. None of my passwords are "saved" in the TB program, and I'm having trouble locating where to tell it to do otherwise.

Screencap and copy/paste attempts to grab second error message failed, but it looked like "RETR failed, one message expunged." So far, it's a one-time error, which I can live with. All emails for that ONE working email are fine.

When I attempt to sign into Google, it takes me to a troubleshooting page https://support.google.com/accounts/answer/32050?hl=en asking me to clear cache & cookies, if I'm using Chrome (which I'm not), instead of just a login to retrieve my gmail.

My emails have been sitting on the servers for 2 YEARS and I am at my wits' end - please help!!!

When I have Thunderbird desktop running but I am focused in another application, I receive a popup notification when a new email is received. In the popup, there is an X to make the notification disappear, but it would be very handy if there was also a trash can icon where, if you clicked on it, the message would be deleted from your inbox without having to go back to the TB app. I didn't see any such options in TB settings, and I have searched the forum to no avail. Is this possible? Thank you.

BlueHost has confirmed that our email (joe@wrigleyranch.com) and/or IP have not been blocked or blacklisted. We tested this together using the BlueHost WebMail app directly and can send and receive emails without an issue. We then tried again to send through Thunderbird. This is the exact and complete error message we received as we attempted to send a test message:

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

 barbarawidener@gmail.com
   host eig-east.smtp.a.cloudfilter.net [18.215.58.191]
   SMTP error from remote mail server after end of data:
   550 Connection Rejected - see http://www.spamhaus.org/query/ip/162.241.225.213 AUP#BL

Reporting-MTA: dns; box5293.bluehost.com

Action: failed Final-Recipient: rfc822;barbarawidener@gmail.com Status: 5.0.0 Remote-MTA: dns; eig-east.smtp.a.cloudfilter.net Diagnostic-Code: smtp; 550 Connection Rejected - see http://www.spamhaus.org/query/ip/162.241.225.213 AUP#BL

This did not occur until the latest update by Thunderbird/Mozilla on Jan 14, 2026 at 7:35pm, MST. It is ONLY Thunderbird that is refusing to send messages, returning this SMTP error message. BlueHost contends that since we are not blacklisted anywhere that this must be an error generated somehow by Thunderbird as we can send email through BlueHost web mail without an issue or rejection. Spamhaus.org also confirms that we are not blacklisted nor restricted. We are only affected when trying to use Thunderbird that we have been using for well over 5 years without any type of problem whatsoever... ever.

We are, however, getting a very odd message from you as we reset our password when we had trouble using our stored password:

We received a request for a password change on your Mozilla account from: Chrome on Mac OS X 10.15.7 Phoenix, AZ, United States (estimated) Sunday, Jan 18, 2026 3:04:13 PM (MST)

WE ARE ON MAC OS X VENTURA 13.7.8. AND THE BROWSER WE ARE USING IS "BRAVE," NOT CHROME. Does this indicate or imply anything that may be wrong??? We are North of Phoenix in Flagstaff, AZ. So, this seems correct as an estimated location (150 miles North).

We need your help!!

Joe Amadeo 928 635 1108 landline, no texts joe@wrigleyranch.com

Hi, I use thunderbird 140.6.0 esr for Linux (Debian 12 with KDE 5). After opening Thunderbird, I am asked for the password to retrieve mail. If I make a mistake when typing it in, I have no chance to correct the password and have to restart TB. There is a correction window for the SENT password.

We have not been blacklisted at Spamhaus.com. Yet, Thunderbird ONLY is blocking of email sent via its SMTP. IP being blocked according to Spamhaus is 162.xxx.xxx.xxx But Spamhaus shows that neither this IP nor my email, [edited] @wrigleyranch.com is being blocked or blacklisted. We are able to send email thru our email client at BlueHost. So, it is definite that we are NOT BLACKLISTED. The last update (automatic) by Thunderbird was January 14, 2026. I'm am suspecting that this update has caused this error. That's why I'm writing you. Can I revert to the prior Thunderbird update to test this theory? I cannot see how to do that. I need help!!! Receiving email is unaffected by this malfunction.

Thank you, Joe Amadeo [edited from community support forum] landline, no texts [edited] @wrigleyranch.com

On my PC Thunderbirds sending/receiving mail says the mail server refused my connection. My laptop works fine. I have duplicated my laptops in/out specifications onto the PC but still nothing works. Spectrum says everything on their end is fine but can't vouch for roadrunner who is the rr in my mail address of ca.rr.com. All this started about 4 days ago. Any ideas on what to try next? Thanks.