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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?

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?

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 !!

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?

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.

I've read this is a common issue but hoping maybe things have changed? Trying to make a filter that says move to the junk folder email where subject starts [SPAM] (the hosting service adds that) UNLESS the address is in an address book, BUT I also need to accept everything from numerous domains. I see work arounds "if the address ends in @somedomain.com" but then I'd have to do that for every domain I want to receive from. Any email from any address where I have put *@domain.com in my address book should be let through. But I know TB doesn't accept wild cards in the address book. There MUST be some way around this? Thanks.

good day....ii hope someone can help. the other day i was accessing my yahoo account spam folder and by accident, i deleted the spam folder instead of emptying it. the spam folder is now sitting in the trash and i'm unable to remove it from there. when i log into my actual yahoo account, the spam folder is where it's supposed to be and not in the trash. i tried removing the yahoo account from thunderbird and reinstalling it in hopes that it would rectify the problem, but it hasn't. does anyone have a solution?? i would greatly appreciate any help you can offer. thank you for your time...mike s

What font can used in Thunderbird that will display a capital I with top and bottom bars? Otherwise it's impossible to determine whether the letter is an capital i or the letter L.

Hallo,

ich möchte ein web.de-Mail-Konto in Thunderbird verknüpfen. Obwohl alle Eingaben und das Mail-Passwort richtig sind, kommt immer die Meldung: "Fehler bei der Authentifizierung. Anmeldung auf dem Server fehlgeschlagen. ...",

I am getting an error for an outdated certificate on my mail smtp server and when I try to add a security exception Thunderbird does absolutely nothing when i click the button to add a security exception where I can send mail. I end up having to cancel the window and discard my email. It will also not go view the certificate and if you ask it to check it just hangs up forever in and endless loop of checking.

Hi all,

After thoroughly searching this database, I could not locate an answer to the issue I am facing, although there seem to have been several similar cases.

My former university has recently decided to delete alumni email accounts, so I am using Thunderbird for email transferring from university to GMail (added both accounts to Thunderbird and then began copying emails and folders). Transfer is slow, depending on the server capabilities etc., but I am going folder by folder and so far it has been fine. I began the transfers a week ago.

Last night I noticed my Thunderbird inbox for my school is not showing anymore. The profile folder is only showing one file (.msf) for Inbox, instead of what should be, in my understanding, two files.

Thunderbird is still communicating well with the university email server because I made a folder rearrangement on the university webmail service (outlook.com) and it showed on Thunderbird. In addition, all my Inbox emails appear fine on the university webmail service (outlook.com).

Any ideas? This is obviously important and urgent.

Thank you in advance.

Why do I have to do this every time?

<DownloadLink> Why_do_I_need_to_do_this_every_time.mov

https://primedrive.jp/v2/access?key=t9NdG3za99jDrgfT9tuvKw

Is there a setting I can adjust? Or is this just how it is with Gmail?