Thunderbird Community Forum

I had two emails on my Thunderbird. I deleted one by mistake. The G Mail account still works. I tried to reenter my Spectrum Account and I keep getting that my configuration user name or password are wrong. I checked all settings and they appear to be correct. I also deleted the account and tried reinstalling it and got the same result. I also tried to enter a new email account that I just got. I had the same result. Keeps asking me to reenter the password. (would be helpful if it would say why it is wrong (password, setting, etc.) I spent hours on this today. I worked with the Spectrum agent and we couldn't fix it. Bur it seems to be a general problem because I get the same result with both accounts.

I have an entry in my address book which I want to update. I right click on the listing and a popup menu appears which includes "Edit". I select that, make changes, but I find no way to SAVE the changes I entered. How do I save the changes?

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.

When I open an email messages in message pane the window is really small. I resize the window, using ctrl+ scroll, but next time when I open thunderbird goes back to being the same small size again. How do I get Thunderbird to persist the messages size that I would prefer?

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 have moved my entire hard disk to a new computer and upgraded to Windows 11. My professional consult did it actually, I don' know how. But he moved the disk to the new computer and cloned its content to the new hard disk. In my address book all folders are empty, all. When creating a new mail, the addresses are all there so I can send emails to the people I want, even to groups. When creating a new sending list I can do so by typing the desired persons and their addresses will show. So all contacts are somewhere on the computer. But the folders are empty, so I can't drag and drop contacts to create a sending list. I can create new contacts and place them in any of the folders, but that will probably f-k up things. I'd be glad if it is possible to restore my address book. I realized that there are quit a lot of contacts that are obsolete, which I want to delete. I'm not native English speaking so forgive me if I got some terminology wrong.

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'm using TB 144.0.1 on a Mac desktop. When I open my address book, several come up. "Personal Address Book" is the default, which is fine by me; I can add, subtract as I wish. There are two others, "Collected Addresses" and "Mac OS X Address Book." The latter is obsolete with numerous bad addresses in it, but even though clicking the ellipses brings a speed menu containing "Delete," selecting it and confirming my desire to delete the address book has no effect. Why have a command purportedly available that doesn't work? My Mac mini uses MacOS Tahoe 26.1, and the obsolete "Mac OS X Address Book" serves only to misdirect my outgoing mail. How can I delete it?

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

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

It seems as thought the Thunderbird "Archive" folder is actually reflecting my Gmail "All Mail" folder (which includes mail w/o regard to labels). However, is the Archive folder duplicating these emails on my PC, i.e. is there a copy of each Inbox email, etc? This would double the size it takes up on my PC. Or is it simply acting like the "All Mail" folder online - reflecting all emails.