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Hi there.

For some reason, 3 of 4 accounts I use no longer open on the accounts list. I cannot expand them, I cannot "Get Messages" for them, there's no reaction whatsoever, as in no message in status bar (which works fine, as confirmed with that 1/4 account that still works).

I checked for subscribed folders and all of them are. I even was able to add a new folder, which does get added via IMAP. This is, therefore, not a connectivity issue.

I also checked the Developer Console and Activity Tasks, absolutely nothing shows there.

I removed global-messages-db.sqlite, folderTree.sjon, the .msf files. I checked in Troubleshoot mode. Nothing helps.

This looks like some nasty bug and I am happy to help debugging this further, if you point me in the right direction.

This happens each time I open up T-Bird. Somtimes it is Yahoo.mail, sometimes it prompts to log onto aol.mail.com.

How can this be stopped?

________________________

desktop Win11 pro Thunderbird 148.0 (64-bit)

I got a new account on my german provider 1&1 and used the right servers the company recommends on its Website (same servers as the previous account). For some reason it is not possible for me to send any Emails but to receive them. On my Iphone I neither receive nor send messages because the server isn‘t working as well. I tried several different accountnames…. I hope you can help me. Thank you!

(PS: first image from Iphone, second image Thunderbird on Macbook)

On my PC - Initial problem was T-bird took forever to load and virtually all new msgs went to TRASH and I had to move to IN-Box. Per help from David - Saved off profile, and reinstalled thunderbird from thunderbird.net. No change. Then UNINSTALLED T-Bird (profile still intact). Now just attempts to open "Looking up imap.comcast.net", but won't open/connect and to close the app I must use WIN Task Master. Can't get to any msgs, etc. Also, in the past when I was able to open, the banner or bar at the top of the page had hundreds of email icons. I sometime have over 1000 emails in my in-box!! I have years worth of emails in folders on T-Bird which I don't want to loose. Help. Thank you. I have a "working" version (with the "trash" and slow loading issue per above) on my laptop, so I can access suggestions on that version of T-Bird. You could also send any suggestions to x@gmail.com

(PII redacted by moderator)

I already have two Exchange email accounts using Exquilla that were created in earlier T-bird versions, they work in the latest version as well. I am trying to add a third exchange account, I enter the email and password do auto discover and get the following error; Invalid or missing password: password does not exist in the directory for this user. Trace ID: b2766d8c-6b02-4879-ab77-e30177281600 Correlation ID: 220ef2bd-c4b2-42a9-9414-d4f7bc0dae35 Timestamp: 2026-03-06 02:43:34Z

An Autodiscover site was found, but we could not find a usable entry. This is probably because your server does not support Exchange Web Services (EWS). If your server does not support EWS, then ExQuilla will not work for you. If you believe this to be in error, try manually entering the EWS URL.

I know the message is wrong since I have two accounts that function. I have gone through the manual configuration as indicated online and still have no success just says "URL test failed". I was hoping this latest version would have another way to be able to enter information to get around the failure. Any guidance is greatly appreciated.

I tried to transfer Thunderbird file from old computer to new computer but get "Profile cannot be loaded. It may be missing or inaccessable." when I start Thunderbird. The old TB file works on old computer and I am pretty sure I copied it and pasted it into the new location in place of the current Thunderbird file.

I have been using Mozilla Thunderbird for decades and they have even contributed a small amount of money to Thunderbird periodically. Just within the last two or three days all of a sudden I have been unable to send emails with my phone. I receive emails, but I do not send them.

So I opened up a laptop where I did not have Thunderbird and set it up properly through Spectrum using the incoming and outgoing servers as mail.twc.com. and yes, just like on my phone. I continue to receive new emails, but even with the laptop I was unable to send an email.

I received the message"send message error sending a message failed. The message could not be sent because the connection to outgoing server smtp mail.twc.com was lost in the middle of the transaction. Try again."

I contacted Spectrum twice and both times they had me try to send a message through their Web server spectrum.net and that message did go through. Of course then their response is that this has to be a problem with the third-party app meaning Mozilla Thunderbird, and they can’t help with that at all. I sure would appreciate some help because I hate to walk away from Thunderbird as well as change my email address after all of these decades.

Thunderbird: Suddenly links in emails are behaving very strangely. Whenever I click on a link, the Inbox window is selected and the link is essentially ignored.

Here is an example: At this site

   do-not-reply@stackoverflow.email

when I click on "Special partition of the set $[n]$" the Inbox window comes up. Copying the link, I find it is this:

   https://sg-links.stackoverflow.email/ls/click?upn=u001.
   OPqImZUVClavrirop4vrL7ZIbR0SrdVPtNEAYlGR3VmeeoYNTs2YYZpJH3BMBXZ
   ypFqhwcCL0W4gGDFAApiH3-2BR016USOPYaLANdPKZjlW0-3DmLFi_2PDPOmwor-
   2B6V31hnv8BUMaRG7aWcOmoOP-2F643cEijic3j9TA5gCHyppxjQ9TBY4lsrML67
   biQlFPRhSQCFZ86ah0lQI9n7U5ZVkveDE2052QW-2FwO-2FJ4UcIm81qFMYmU4O9
   ShqKKGy36kM1z-2B0fnN11b-2FmCJIGaFm3B3hOcHelGa2JqxXxo-2F8aMi-2Fab
   n3xpHjNGJDJPOuqQnbUcmzFgjFJLgUlRBoqqXrtNOiG-2BPf6zckqkur9C-2F6-2
   BPScg-2FqxGd62MyveIhjj3E5eymt0AYJwns5QMh0aB7x3ffsUN3-2BKtcGiHEoT
   Isj3JEhymMdbub5Toszk1Y7XWWv8ZpJnhplevIVkQK0wcXBECWPTCeRLfomlTrRy
   Vffv1ElwvyqjmrUdrboHKtWj6uN5LLWErraNc2hr1FSAD1-2BP4p9X2YFH8frIa6
   sfYVg3S-2Fv8soK9qvkx6wfObpB1s-2BGXqPxng1zj5yYUDyibE-2B32qXO1nRXA-
   2FjIL4U2JeijYg8lA7Et8QZWT

This is over 700 characters long, which seems a bit strange.

Any info on fixing this will be greatly appreciated.

Roger House

Apparently MS has changed something in their OAuth2 and Thunderbird has yet to catch up. I've seen several other questions regarding this, but no workable solutions, just silly replies. Is TB actively working on a solution or am I now forced to install Outlook?

Hi, somehow thunderbird forced me to use OAuth for caldav and carddav. (v140 on linux) Unless I've probably missed something this approach doesn't seem to have considered that people might use more than one device. In the past I had an application password per device with my mail provider. That password covered imap, smtp, caldav and carddav. The application password I could set with a specific name at my mail provider. If the device was lost, compromised or whatever I just deleted that one application password at my mail provider, problem solved. Now a regular thunderbird setup has the application password for mail and 2 OAuth records per device under "Connected Apps" at my mail provider. But it is not possible to see anymore to which device the OAuth record belong, as there is nothing device specific coming along with these OAuth records, just an IP. With that perspective OAuth weakened my security options, as I can only guess which OAuth record I have to delete in an emergency case. Did anyone who implemented that with Thunderbird considered that people may have more than 1 device? Maybe even more than 5 devices? That OAuth approach looks unmanagable to me. Is there a way to switch OAuth off in thunderbird, until it becomes more useable in >1 device setups?

Cheers Tjareson

I'm reading this> https://support.mozilla.org/en-US/kb/thunderbird-export#thunderbird:linux:tb148 Looks great but all of my messages sit on IMAP servers and I don´t need a backup of those. I _do_ need a backup of settings, passwords, pgp keys, to move to another workstation. It is unclear what exactly is exported.

HI, Thunderbird for Mac no longer allows me to see emails more than 4 months old. I have an AOL account and when I use the (lousy) AOL app I can see email going back at least a decade, so I know they are there.

This changed with a recent TBird update. I have checked online support, studied the different settings, and cannot find out how to set TBird to let me access all my email.

Can someone help me with this?

Thank you, James

I currently have Thunderbird installed on both my android and desktop (W11). My android inbox does not mirror my desktop. For example, desktop inbox shows many more emails than the android inbox. The ones that are in both are the same. Why doesn't the android inbox mirror the desktop version?

Additionally, I used receive a ton of junk mail when using Edison mail. Now I receive very little. Sounds like a good thing but occasionally one gets flagged as span and it isn't. They continue to show up in the Edison mail spam folder but not in Thunderbird.

I was hoping to drop Edison mail and use Thunderbird exclusively, but I need the confidence before doing so.

One of my two outlook email accounts no longer appears in Thunderbird, which says it is authenticated but not connected. This happened suddenly. I can still get the messages by going onto outlook.com. How do I get it back on Thunderbird?