Thunderbird Community Forum

On upgrade to 152.0, a pop-up asked for options I have not seen before. I cannot find info about what the net.thunderbird option is, nor why I would or would not want to click it? Any help out there?

Thanks!

I have used thunderbird for many years and was always very pleased with how easy it is to search for old emails, using just about anything--an email address, a word in the subject line, or anywhere else. Lately, it no longer finds all the message for a simple thing, like an email address. Has something changed?

Also it seems that copies of my emails are not necessarily kept locally in that it often says it has to download my messages off the server, which can take a bit of time. In the past it has only downloaded new messages, but now it seems to download everything.

All this leave me with the sinking feeling that my whole online record could disappear at any minute. Any ideas?

I've installed a legacy version of TB and been using it for some weeks, now. [52.9.1 (32-bit)] That's necessary because I run a legacy windoze OS.

I have an idea of how to make the Start Screen Layout easier for me. Specifically the accounts / mailboxes panel, where I [so far] have nine email accounts. The idea is that - under all-but-one email account - have these two folders:

• Inbox
• Sent

Then, under the email account I use the most, I will have

• Inbox
• Drafts
• Sent
• Junk
• Trash . . .

. . . . followed by all the necessary and appropriately-labelled subfolders.

Is there any reason that's a silly idea?

What's the Local Folders thing, at the bottom?

After nearly 30 years, Eudora's SSL settings have made it incompatible with current mail servers. Or so I was told.

Oh, I'm a geriatric, even if a little more computer savvy than some of my contemporaries.

All of a sudden every time I open something in an email it automatically creates a new tab. When I delete what I have open it takes me out of my email account and I have to delete the tab to get back to my remaining emails. I have changed nothing so I am confused as to why it has recently changed.

Goal: I have outlook on a windows 10 desktop with many .pst files I want to keep (emails in folders and contacts)/import into TB. I want to set up Thunderbird on a new laptop PC and use TB instead of Outlook.

I'm setting up Thunderbird first on my desktop but I don’t know how to import the outlook files – one Q&A answer says first install an older version of TB that can do the outlook import (I started this and it couldn’t find my account so I got stuck); another Q&A answer says the outlook files have to be ‘offered’ to Thunderbird and may or may not be.

Can I have human help? I’m happy to pay. Otherwise I don’t think I can figure it out and I’ll just stick with Outlook. I see someone else switched to TB and then went back to Outlook. Hmmm. I wonder why?

Thank you so much. It sure seems like a great product you offer but it's overwhelming figuring out how to get there from here.

Until recently the folder pane could be sized or hidden via the double-headed arrowed cursor. Shortly after the 151.0.1 update this stopped working. All suggested solutions have not worked. A full uninstall (Revo Uninstall) and completely new profile has not fixed the problem. Folder pane only responds to the menu setting and is only Open/close but no sizing.

I have no idea why Thunderbird stopped working for me and I can't seem to solve the problem - one day. I got a notification to re set my credentials - nothing since

My old desktop used Windows 7 and I used Thunderbird as my mail. I had a tech help and transfer files to a new desktop running Windows 11. Mail came over but he said he couldn't use thunderbird for a reason??? and switched it to Spectrum Mail which I don't like. I would like to restart a thunderbird mail account again but don't remember my password and my old computer has been destroyed. Any way to do this without starting from scratch and losing all my old mail and contacts?

The system was working fine. The next day, when starting Thunderbird (TB, the status line shows logging in to server but loops; no errors or messages, Thunderbird is 'locked out' spinning. I see the normal INBOX page, but logging in never completes. NO CHANGES were made to TB accounts or settings. I have re-installed TB, re-booted, but no change. I cannot check/change any of the accounts or do any further 'debugging' because TB is spinning. The server login is fine because Webmail can be used. Internet connection is fine, because browser works. 1. How can I stop TB from trying to login at start up? 2. What could/would cause this behaviour?

Any suggestions much appreciated.

Thanks in advance. I'm trying to get Thunderbird setup with an outlook.com email address. All the default server settings look fine. I know the email address is good since I can login via a web browser. Cookies enabled and all the other recommended settings including app password. Yet it keeps saying Unable to log into the server. Has anyone successfully done this with the latest version of Thunderbird. I'm on Zorin 18 Pro.

Regards,

Mark Verhyden

Hello,

we have a reproducible issue in Thunderbird when forwarding emails with attachments.

Environment: Windows 11 Professional Thunderbird version 152.0 (The issue also occurred in the previous Thunderbird version) POP3 account Mail provider Strato AVG Business Antivirus installed, but the issue also occurs after testing AVG related settings Issue occurs with different attachment types and sizes, for example PDF and DXF files

Steps to reproduce:

1. Open an email with an attachment. 2. Forward the email using Forward Inline. 3. Add recipient and some text. 4. Save the message as draft. 5. The first save works. 6. Save the same draft again, with or without changing the text.

Actual result: The second save fails with an error message similar to:

“Your message cannot be saved as a draft. There was an error attaching [filename]. Please check if you have sufficient access rights to the file.”

Expected result: The draft should save repeatedly without an attachment error.

Important observations: The problem occurs with all tested attachments, not only one specific file. The file size does not seem to be the cause. The issue also occurred with a small DXF attachment of about 355 KB. The issue also occurs in Thunderbird Troubleshoot Mode. The issue still occurred after creating a new Thunderbird POP3 profile and downloading the remaining emails again from the Strato POP3 mailbox. Changing the draft folder did not solve the issue. Removing temporary Drafts files and rebuilding the Drafts index did not solve the issue. The issue originally appeared to be related to AVG, but later tests showed that AVG is not the main cause. If the automatically inherited attachment is removed from the forwarded message and then manually dragged again from the original email into the draft, the draft can be saved without problems. Changing forwarding mode from Forward Inline to Forward as Attachment solves the issue.

Conclusion: This looks like a Thunderbird issue with automatically inherited attachments in inline forwarded messages. The first draft save works, but on the second save Thunderbird seems unable to reprocess or resolve the inherited attachment and shows a misleading access rights error.

We would appreciate any advice on how to further troubleshoot or resolve this issue. If this is a known bug, we would also be grateful for any information regarding a planned fix or available workaround. We are happy to provide additional information, screenshots or perform further tests if needed.

I imported an appointment into the calendar. I wanted to setup a reminder. The only option is "Show an alert". Is it possible to to create a reminder option other than "Show and alert"?

Did I dream seeing an ad for a new system for sorting incoming emails to what I would call folders, but I think it had sections like Work, Home, Family etc.? Can't find anything on it. I would love to be able to park stuff in separate folders without me actually doing it!

I just upgraded from thunderbird 140 to 152 on Windows 11. I have master password setup.

Every times I start thunderbird, calendar keeps asking for authentication ( oauth ) , I did login successfully and was able to view and modify my events.

After a couple of startup I decided to click on the close button of the oauth authentication windows for calendar. I still able to see and modify my calendar successfully. Is it a bug or I miss something in the calendar settings  ?

Thanks

roland.multhaupt

18. Juni 2026, 07:13 GMT-6

Firebird is so slow now, that I can rarely receive the code that you send me. Have to take annother programm for that. Freezes even when trying to mark a mail or erasing it. WIN 11. The programm is working well at my wifes laptop also WIN 11. 2 month ago it worked fast and fine. Working in Troubleshooting mode does not show any spam ordner like before and it does not run better. I also downloaded the last version. No change! I would like to uninstall the programm but did not dare due to perhaps loose all my mails. Could you help me please? Thank you!