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docx and xlsx attached files don't open with I click on them. I want them to open in Word and Excel. Nothing happens. I have to save them to my Desktop and then I can open them.

doc and xls attached files open when I click on them.

I can't find any associations in "files and attachments". 

I'm using version 140.7.0esr (64-bit)

Hi, I'm a new user. I cannot send email. Receive is ok.

I get this prompt: Password required for outgoing (SMTP) Server mailhost.zen.co.uk So I add the password, but then I get this error: Login to server mailhost.zen.co.uk with username zen53214 failed. Retry - Enter new password - Cancel I add a new password (the one I use on the zen webmail portal) and I get this message: Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) AUTH command not available at this time. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'. The outgoing server setup is the following: Description: zen53214 Server name: mailhost.zen.co.uk Port: 857 Connection security: STARTTLS Authentication method: Normal Password User name: zen53214

There is a sync issue with zen email password but I cannot change it on the zen portal, because the password in ThunderBird doesn't have a special character and Zen will not let me change the existing password to one that doesn't have a special character.

What can I do to resolve? Please help. I'd like to stay with ThunderBird email.

Thanks!

Please return my Computer to using Firefox default as my browser as it was 2/01 /2026.Ive tried several times to do this w/o success . I was using windows 11 and have been trying to get rid of MS365 which I never used but have been charged for a solution , but have been blocked and refused cancellation after they asked me to change my email address and PW . Insanely confusing !

Hello, Having followed the advice as under: If you've previously made use of Firefox Sync, please make sure you're signed into your Mozilla account and have enabled Bookmarks within your Sync settings, because Firefox will automatically download any available data from our sync servers as long as you are logged into the account you used to sync.

Additionally, please consider that if your bookmarks are still available in the local storage of another device, signing into Sync on these devices will let you upload this account data and make your data accessible on any other devices you enable Sync on.

Andd checking the the Bookmarks tick-box was checked [as was last attempt] I tried to sign in to open the required page, but got 2 x 'error' windows, as attached, one for enail address [been using this for 2 yaers] and the other for password [how did I get this page up with the wrong password??]

I'm obviously a very dim Brit . . . . . please would you advise me as clearly as possible about whatv the heck is going wrong, thanx Kr CB

Before the new profiles update in Firefox I was using the old version of creating profiles and I want to move that profile into the new profile method. Is that possible?

I have three email accounts all from different sources.

Two of the three accounts work fine but one account will give me this error message. I back up the Thunderbird folder every week and copied the backup to the working folder and I still have the issue.

I've been getting multiple emails of the same in a few folders. I do have a lot of Filters set up for the account affected.

I searched how to disable any random new AI features Firefox was about to cram into the browser.

I was served this support page that says I can "Block new and current AI features (single switch)"

Simply, the described feature to disable AI features isn't in the settings. I've look and tried searching for "Block AI enhancements" & "AI controls" but no luck.

Please tell me they haven't given the writing of support pages to some shitty LLM.

Hi

I have tried multiple times today to change my password to a more secure one.

I do not receive the emails with the code to continue - have checked junk, spam etc.

I have another email address you can use: [email 2 removed] or [email 3 removed] Please help

Error message: the bookmarks and history system will no be functional because one of Firefox's files is in use by another application. Some security software can cause this problem.

I tried following the directions in "learn more" but to no avail. Please help this senior citizen get his bookmarks back! Thank you.

I have two e mails, but when i try to go to my secondary email [email 1 removed]@gmail.com i always get my primary one, [email 2 removed]@gmail.com. why?

I have noticed the number of messages in my spam folder growing. When I check what's there I find that many are not spam and they haven't ever appeared in my inbox. Sure, I can drag them back over but that's not ideal.

How can I control what goes into my spam folder?

I am new to Thunderbird (just since this past weekend). I cannot figure out how to add a new folder to my folders. I need to file some emails on a new subject that I want to keep. Thank you for your help.

Bonjour M. David et grand merci pour votre soutien. Je suis désolé de vous solliciter autant ! Pardonnez-moi mais je commence à être vieux (83 ans et demi …). Je commence mieux à comprendre votre proposition pour la commande « insérer » (on verra l’autre problème plus tard). J’ai cliqué sur la commande « nouveau message » en même temps que sur la commande « MAJ » (je pense que c’est celle qui permet de saisir une majuscule) mais cela ne m’a rien donné. En revanche, j’ai cliqué sur « paramètres des comptes » et j’ai cliqué sur « HTML » (voir image ci-jointe appelée « HTML »), mais cela ne change rien car je ne vois toujours pas comment ajouter la commande « insérer » dans la barre d’outils. D’ailleurs je n’ai pas vu la mention « composition et adressage ». Par contre j’ai essayé d’ajouter d’autres commandes dans la barre d’outils en cliquant sur « affichage » « barre d’outils » « personnaliser », mais je n’ai pas vu la commande « insérer » (voir image ci-jointe « barre outils »). Si vous avez le temps de continuer à m’aider, je vous en remercie bien sincèrement.

Hello Mr. David and many thanks for your support. I'm sorry to ask you so much! Forgive me but I'm starting to get old (83 and a half years old...). I'm starting to better understand your proposal for the "insert" command (we'll see the other problem later). I clicked on the “new message” command at the same time as the “SHIFT” command (I think it’s the one that allows you to enter a capital letter) but that didn’t give me anything. However, I clicked on “account settings” and I clicked on “HTML” (see attached image called “HTML”), but that doesn’t change anything because I still don’t see how to add the “insert” command to the toolbar. Besides, I didn’t see the mention “composition and addressing”. On the other hand, I tried to add other commands to the toolbar by clicking on “display” “toolbar” “customize”, but I did not see the “insert” command (see attached image “toolbar”). If you have the time to continue to help me, I sincerely thank you.

I have uploaded an image of my view of the email client. As you can see, there are two columns under the red arrows. I have made them appear through a menu accessible by three dots. Somehow, I have lost that menu but touching the wrong choice and I would like to be able to access it again so that I can remove the two colums indicating the number of emails and their weight. Can you help me to retrieve that menu?

I just got thunderbird. I want to empty my sent folder. It shows over 800 folders and I'd like to get them off my computer. I've looked through all the faqs and cannot find any answer that addresses this. I did read one that said I should check "unified folders" then I could do it. I did check it and still can't figure out to do it. Please help I am quite distressed.

I tried linking my unlinked profile to my email, I made a typographical error there and when I tried to undo it, Mozilla says this profile is already linked to that email. Mind you, I have not even entered a password or verified that email address yet. I cannot even remove that email from the profile now, even if I do and try to re-sign, the accounts page says I am already synced to the typo email.