Thunderbird Community Forum

I cannot set up my icloud email in Thunderbird.

Error implies that the password is incorrect but i know it's correct, i am able to sign in to webmail using it just to prove a point.

"Unable to log in at server. Probably wrong configuration, username or password"

I have verified server info on apple support and verified username and password is what i use on all other devices. Username and password also works on MS outlook.

I’m on Thunderbird 148.0.1 (aarch64), and having an issue each time I go to my Sent folder. What happens is this. I try to select an email I just sent minutes ago, and Thunderbird scrolls down to almost the last sent email (in my case, as I keep everything, that email could be years old).

This is only on my M1 MacBook Pro, as on my 2018 Intel Mac Mini (both systems are running Sonoma 14.8.4 I can select any recent email in my Sent folder and the selection stays.

The summary says it all, really. I've tried all sorts of Google searches and fixes, but nothing works; I was originally on Netscape Navigator, and after Microsoft killed that off, I went to Firefox and Thunderbird - so 'lost in the mists of time ' sums up my problem.

Hi folks

When I tried to start up Thunderbird this evening, it has taken me to a set-up page. I seem to have lost all the settings, all my previous (about 3000 !) e-mails in my Inbox.

I obviously don't really want to set it all up again, but it has been working for years without a problem, and then suddenly this happens. I had now a 'warning' message saying that Mozilla Thunderbird wants to make changes to your computer - do you accept? I don't want it to make any changes unless it is to revert back to how it was.

Can anybody help me?

Thanks.

hello I have bought with donation thundrbird, but is is in the wrong languange. I am installin g italian now, ant it asks me to contribute again. Can you reimburse the first payment thanks you laura bonanni

I have 2 Verizon accounts in Thunderbird. One of them works fine, the other one gets the emails that were sent to the first one. It's like there is a forwarding address sent on the first email that is sending them to the second one. I removed the accounts completely, uninstalled and re-installed the Thunderbird and I still have the same problem. On webmail, on aol.com, the email addresses work perfectly fine.

Hello, I’ve just started using Thunderbird and I really like it so far.

I have one question regarding attachments. In emails that include attachments, is it possible to change how the attachment area is displayed? Currently, it appears as a single line at the bottom of the message. Ideally, I’d like to have it displayed more prominently, preferably at the top of the message, similar to how it appears in Outlook.

So far, the only adjustment I’ve made is setting mailnews.attachments.display.start_expanded to always show attachments expanded. Are there any other settings or methods to further customize the attachment view or position?

Thank you in advance.

I have 2 accounts. One account is for my normal email address, which contains my usual "Name+Surname@gmail.com The second account is for a fake name (as used on this forum): oldgrantonian@gmail.com

In Thunderbird, my normal email address works fine.

But the last email in my fake email account was on 16/02/2026. I can't send emails from the fake account.

The online version (mail.google.com) is fully up-to-date. I can send and receive emails in both accounts.

I would be grateful for any advice on how to restart the fake account.

Thanks

Firefox added a Windows SSO check-box to its security and privacy settings and UI.

It corresponds to the "network.http.window-sso.enabled" prefs. My org now requires this to allow sign-in in, including for emails, so Thunderbird is affected. Any plan to support this prefs? I wpould be fine editing my prefs.js file in muy profile if no UI is provided. As of now, Thunderbird no longer is compatible with this org requirements.

Hi! Since I've installed Thunderbird on my new computer with Windows 11, I've now twice experienced the disappearance from my inbox of a bunch of emails. Never had this before with Thunderbird. Could it be something needs doing in Settings (I couldn't find any relevant options)? The emails weren't among the newest, but they were all important.

Hello everyone. Thanks for all your support.

A few weeks ago I started noticing a pop up window was occurring every (approx) 5 minutes in Thunderbird suggesting that I run a compact to save 992MB. I assumed this would stop happening after a few weeks and a few updates from Mozilla, but the problem has remained, so I'm coming here to ask about it.

Context: I'm on Windows 11. I have multiple email accounts that my Thunderbird reaches out to. At least one of the accounts is retired so reaching out to its historical server fails.

Reproducing: For me to reproduce it, I run the compact. Quit Thunderbird. Start Thunderbird. It reports 992MB can be freed. I let it compact. The main inbox disappears and reappears. I wait a few seconds and restart Thunderbird. It again tells me that it can save 992MB by running a compact.

What I've tried: I've tried repair on the inbox folder of the account I'm typically in. That didn't help. I have many other folders across many accounts and not tried to repair any other folders. I've searched the Mozilla help system.

Logs: It seems to me that a compact is probably failing but I don't know where to look for evidence of the failure.

I have created a new gmail address for my wife. Would like to add this address to my existing Thunderbird Mail account so that her emails also come to my Thunderbird email account. Not sure how to add her address to do this.. Thanks

My routine login to my Apple e-mail account just failed. neither my new Apple ID password or my old special T'bird Apple mail password xxx-xxx-xxx-xxx works.

What changed and how can I fix it?

[edited from public] @icloud.com seems to be working on Apple Mail, but T'bird won't connect...

Help. Help. I have been a very happy Thunderbird user for many years. I have linked my microsoft exchange calendar to thunderbird with the TBSync and Provider for Exchange ActiveSync.

With the upgrade to version 148, those add-ons no longer work.

So I downgraded to 140 ESR and those two add-ons were ok.

But when I tried to link them to my calendar, they would not sync. I received 401 and 403 errors from the automated setups. And the manual setup, asked for my password over and over again. They all worked beautifully before.

Please how can I get them to work again. I do not want to have to shift to outlook.

thank-you

Linux Tbird 140.7.1esr (64bit) running under Ubuntu 22.04, and with imap on all my email accounts. I normally manage emails locally in Tbird, hardly ever go to webmail.

In my list of Local Folders, there are two which show up with the name 'Outbox' and identical icons. Viewing each folder's Properties, the name Outbox is unsurprisingly given for both, but their locations are different: mailbox://nobody@Local Folders/Unsent Messages mailbox://nobody@Local Folders/Outbox

1. Are these two folders supposed to have the same purpose? One (or both) must be for the [in my case extremely rare] situation where I compose an email but its actual sending is frustrated (eg router turned off).

2. I cannot rename either folder, eg by attempting to edit the Name field when viewing the properties box. If their function is distinct, being able to change the name to reflect this would be nice.

3. If the purpose is the same, presumably only one is actually used by Tbird. Which one? Can I delete the other, and if so how - just in case Tbird would automatically recreate it?

Not a big deal - this has been the situation for a long time (brain fog stops me remembering just how long) - but this is untidy and it niggles.