Thunderbird Community Forum

Suddenly last week, the behavior of my Local Folders emails changed. Double clicking caused a reply-to default, not an open in a new window default. All sub-folders seem to have this problem even new ones. Right clicking shows a menu where New Message From template is the default. No other accounts have this problem, but Local Folders is my main email area. Flags show the Inbox as an Inbox, not a Template. Opening a new subfolder under Local Folders indicates that Local Folders is renamed somehow as Templates somewhere in the underside of Thunderbird. I see threads about recent All Mail issues, but this seems different. I have also tried JustAnswers but am unsure that the issue will be fixed with just redoing the Inbox folder. I have also tried the Conifg Editor to change the default right click menus as recommended in various help forums but to no avail. It looks like some part of Thunderbird is handling Local Folders as before, but other parts are assuming it is a Templates folder with Templates characteristics, which it is not. Is there something else I should try?

Thunderbird says this "the certificate for imap.supanet.com does not come from a trusted source". however I have used this email for some time and am happy with it . can I continue with this certificate as I do trust this source

My ISP, Plusnet, has recently migrated stored email to a new organisation called Greenby. From the day that Greenby confirmed that the migration was complete, no new email has appeared in Thunderbird.

They said that there was nothing to do, although I had to confirm some credentials such as username and password.

Clearly, there was something to do! How can I restart the download of email from my new Greenby webmail account to Thunderbird?

So far I used MS Outlook for Calendar and Contacts as well beside to mail. How can I import Those data from Outlook and synchronise with my Samsung A53 mobile (Samsung calendar and contacts) without using MS cloud?

Hi I was using TB 142 without problems. When upgrading to 143 ou 144.B4 I have problems sending mails to all users after some times. Usually the first mails are sent immediatly but after around 10 mails, I have very slow response (varies from 5 sec to more than 1 minute and sometimes timeout). Usually quitting TB solves the problem but this is very annoying. I went back to 140LTS and sems to have no longer this problem. This was tested on many diffrent networks. I am running under Fedora release 42

Thanks

Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp-mail.outlook.com failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again.

Seem to get this (or similar) error frequently. It's like the things I set randomly revert or change. Have sent images of settings. I certainly don't know what to do.

I am using Version 146.0, released December 9, 2025, on a Win 11 Pro, v. 25H2 pc. No problems until today. Messages won't download from two AT&T (ameritech.net) accounts. T-bird is not asking for mail key. No change after restarting T-bird; same result after rebooting pc. How do I restore email access? Thanks.

I have three accounts set up in Thunderbird and my "ALL MAIL" folder has disappeared from my GMAIL ACCOUNTS. I did however appear to have 2 x Archive folders but in schofijnet10 one has disappeared in john.schofield10 i have 2 x DRAFT Folders and 2 x Sent folders in schofijnetQaol I have 2 x ARCHIVE and 2 x SPAM Folders Please see the image

since last update my *All Mail* folder is empty but at the top it says there are 138,944 messages. I can use some filters and SOME messages appear but by far not all that should match that filter. any clues? thanks,

Thunderbird 140.6.0esr (aarch64) on a Macintosh using Tahoe 26.1

I had a scammer in my email. I've since taken the computer to a 'fixer' guy --and they got the intruder out. BUT my read emails are disappearing after a short time. Is there some setting that automatically deletes them? how can I find it and change it??

 Sally Smith

I want Thunderbird to stop marking everything I delete as having been read. The way it works now, if I accidentally delete mail that I haven't read yet it's much more difficult to find it when everything is marked read even when it wasn't. I searched everywhere and haven't come up with a solution for this. It was reported as a bug years ago and was never fixed.

I use Thunderbird as my email client for my remote machine setup through Parallels Client desktop software for PC. After the recent update, every time I want to send an email, the compose window opens along with another browser window that displays my email account page home screen. Before only the email compose window used to open and after sending the email it would close. Now with the browser window that opens every time, i can't send another email until i close the browser. The attachment that i am including in my email also opens in the same browser window in a new tap and i have to manually close them.

How can i go back to just the email compose window to open and not the browser for every email?

Thanks, Yashar

Hello,

I would like to report a possible issue with the QR code used on the desktop version of Thunderbird to set up or transfer an email account to a mobile phone.

When I scan the QR code from my PC with my phone, the process fails for one specific account. This email address is quite long (36 characters), and I suspect the issue may be related to the address length.

For your information, all my other email accounts (9 in total) were transferred successfully using the QR code, and they all have shorter email addresses.

Could you please confirm whether there is a limitation on email address length for this QR code-based setup? If this is a known issue, is there a workaround or a fix planned?

Thank you for your help.

Best regards, Steve

Hi,

Longtime Thunderbird user. Was online last night, emailing (sending and receiving) perfectly fine. Got online this morning - no changes to my computer or Thunderbird, and suddenly am getting this message:

'Thunderbird could not connect to server inbound.att.net. The connection was refused."

I am able to read mail fine from AT&T Mail via webmail or the Yahoo Mail app. This is strictly an issue with Thunderbird and AT&T.

Any other AT&T users having an issue? Any helpful suggestions? If it matters, I have a bellsouth.net email address.

Thanks!