Thunderbird Community Forum

I start to make a new email message. I start typing in the recipient's email. Auto-complete finishes the address but misspells it. The recipient's email in all the address lists have it correctly. I recently saw the light and came over from Outlook. I imported my Outlook address list. It was correct in Outlook. Newest version of Thunderbird. thunderbird-MSIX - 1.0

I have moved my Thunderbird data from drive C:\xxx\Thunderbird to N:\xxx\Thunderbird. The Thunderbird program remains on "C:\Program Files\Mozilla Thunderbird" How do I tell Thunderbird to find its data on the N: drive?

     Thank you,    Art Lieberman

I'm on a new Windows 11 desktop with two monitors. Everything's been working just fine up until around 26th April (two weeks ago) when the native Thunderbird new mail notifications started appearing in my second monitor, rather than my main display. I had made no changes at all myself.

I've been through all the fixes suggested via Google (toggling the displays; checking Windows notification settings), but none of those fixes have made any difference. I switched to using Windows system notifications for a while, but I really don't like them.

Might this be something in a Thunderbird update itself? It just doesn't seem to be detecting the primary monitor at all. All my other app notifications continue to show on the primary display.

Has anyone else encountered this or have any other solutions I could try?

Thanks, Averill

I'm trying to re-establish my Thunderbird account after having to re-install Windows. I get to a screen titled "Account Hub" that asks me to add my e-mail address and password. I don't have or recall a password and the screen does not allow an option to recover a password or create a new one.

I'm getting "Thunderbird can't connect to the server" message, so I can't download messages. However, a message or two will finally download 1-2 hours later.

Same problem on 2 laptops, both running Windows 11. But I know my emails are coming in as I can view them via Spectrum webmail. So the problem isn't the Spectrum servers.

I've logged out and back into Thunderbird, and have re-booted my laptops. No luck. What to do?

Also, is there a place to report problems directly to Thunderbird?

Thanks for any help.

I am trying to add an email address to thunderbird it is an outlook email address [edited]@outlook.com I have checked the address and the password and both are correct however thunderbird says that the configuration is incorrect and will not accept it. also I have it open in another browser window will that cause problems ?

All of a sudden today I'm getting the message "could not connect to server mail.twc.com; the connection was refused." So, I'm unable to send/receive email. I called Spectrum and they said go to Spectrum.net. Yes, I was able to get my email that way, but that eliminates the ease of using Thunderbird. I've read all the messages about this issue, including changing various settings, but none have helped. Spectrum says nothing has changed on their end and it must be a Thunderbird issue. My current settings are: Incoming: Server Type: POP Mail Server Server Name: mail.twc.com Port: 110 User Name: [my email address] Connection security: None Authentication method: Password, transmitted insecurely

Any other suggestions?

Version 140.10.2esr | Released May 8, 2026 I get this message every time: Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) mail.twc.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.

Thank you, George Correia

Thunderbird stopped working a week ago, and I've wasted HOURS trying to uninstall and reinstall the app in hopes of getting it to work. Best I can do is get it to run, accessing my gmail account, but I'm interrupted repeatedly by screens asking me to choose my gmail account, followed by a screen that asks me to click on a 'give access' button that appears nowhere on the screen. Such a shame that you folks and Google have collaborated in a way that makes a very nice app completely unusable. If you and Google can ever get the access issues resolved, pls advise via email and I make one last attempt to get the app to work: rws.pgh@gmail.com.

I have multiple email adresses for different purposes, but all of the incoming emails are sent to the Local Folders inbox, where I have separate folders to save emails for the each purpose. I am able to manually sort the folders in the order that I prefer, however each time I shut down Thunderbird and then restart it, the folders end up in seemingly different random order each time. Is there a way to ensure the manually sorted order of the folders does not change?

I have tried using s/mime encrytpion for the first time. I have created 3 different accounts using the same CA on 3 different devices. All three can communicate with each other using the s/mine encryption. I used multiple methods - sending a signed email first and then encrypted+signed, creating a .pem file with public key - importing it in Manage certificates/people and sending an encrypted+signed email. Sending an encrypted email from-to the same address also works. What I can't seem to be able to do is use any other public keys. I have a list of companies and their keys, but whether I use a file downloaded from their site or copy the key to txt and then make a .pem file out of it, as I did with my addresses, I can't send an email that is both encrypted and signed. I get "end-to-end encryption requires resolving certificate issues for ..." and the recipient status "not found". They specifically don't want to send a signature first and then encrypted+signed, and I am stuck trying to figure out what I am doing wrong. Any help is greatly appreciated.

I'm using Thunderbird with an Office 365 business account via EWS.

I'm trying to reduce the amount of storage used on my local machine by setting the "Synchronization & Storage" setting to 3 months instead of downloading everything, but every time I change the setting it doesn't stick.

I'm on Thunderbird 150.0.1 (Windows).

I continually get this message from Thunderbird: https://p123-contacts.icloud.com is requesting your username and password. I have entered apple pw but it never stops. Anyone else seen this?

I am trying to find a program that allows me to use all the features of iCloud Mail on my Windows 11 OS . Is Thunderbird compatible with iCloud Mail ? I tired installing and using Thunderbird but it seemed that some of my sent emails were not delivered. So I uninstalled Thunderbird.

For the past 2 days, either my inbox is empty on startup, or if I see my messages, they disappear completely once I open any folder. Also, I have over 2400 messages in Trash, and can't empty the folder. No settings or connections were changed. What gives?

in den Ordnern veschwinden die mails, kommen schon mal wieder und sind dann auch mal weg.. Betrifft nur emailadresse arcor. quasi abruf bei vodafone. port und so sind richtig eingestellt. habe auch deinstaliert und neu aufgespielt keine änderung. die konten über gmail laufen ganz normal. finde den fehler nicht.

When using message filters "Run Now" is often greyed out after running a filter and remains greyed out after the filter has completed filtering. (Hung up?) This does not happen if the filter does not find any matching messages. Clicking on another filter and then returning to the first one returns the "Run Now" button to active (not greyed out). Not sure, but the problem might be associated with filters that copy a message file to a Local folder, or delete messages, or move messages to Trash, or all three. I'm stumped. The problem started recently and I'm not aware of any changes I made to Thunderbird.

It's been almost a week now, and my 2 Microsoft email accounts will not connect to Thunderbird anymore. All was fine for years, but something changed that I can't figure out!?! I have gone to my Microsoft email server and checked that my passwords still work. I even updated one and it works on Microsoft server but not Thunderbird's!?!? I even deleted one email account from Thunder bird to re-install it, but when I tried a fresh re-install Thunderbird still won't connect to Microsoft server??? I'm at my wits end, and may abandon Thunderbird completely if someone there doesn't help me connect!!!

I didn't knowingly make any changes in Thunderbird, but my Sent folder says there are 2,669 messages in the folder, but displays an envelope and No message found. I upgraded to the latest version. How do I fix this?

(I haven't had time to move all functions to another drive.)

Extech