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When I try to send an email from Thunderbird sometimes it succeeds and sometimes it does not. Trying again sometimes works and sometimes fails again. It may take many attempts to get a message to send.

The "Sending Message" dialog box gets replaced by a "Send Message Error" dialog box saying, "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp-mail.outlook.com timed out. Try again. OK"

Thunderbird version: 115.9.0

SMTP Server: Description: Office365 (Microsoft) Server Name: smtp-mail.outlook.com Port: 587 Connection security: STARTTLS Authentication method: OAuth2

Operating system: Windows 10.0.19045 Build 19045 ISP: BT Broadband Antivirus software: AVG AntiVirus Free 24.1.8821.822

Please advise on how I can get all my messages to be sent successfully first time. Thank you.

I have used Thunderbid for many years. Lately it is extremely slow displaying and deleting emails; and is not saving passwords. It is fast enough to display images once the email is on the screen. I have tried reindexing and have added T to Windows Firewall allowed. No other antivirus on the machine. The problem is the same for imap and pop accounts. My profile has been on a NAS for several years but the slowness is only recent. I don't have any add ons. A possible clue is that there are multiple email folders in the profile - see attached screenshot. Should I delete the -1 -2 -3 -4 folders - and the associated msf files? The profile as a whole is 869 MB - 2168 files in 142 folders. There is lots of space on the disc. There are a lot of -1 folders across the profile.

About 1 week ago Firefox with Windows 11 stopped displaying YouTube video comments. I've tried other browsers and I can see the comments.

I only have 6 extensions and have disabled all of them and still have the problem. With Firefox in safe mode the problem goes away and I can see the comments. I've cleared the Firefox cache and hardware acceleration is off. I have the standard themes and using the default system theme-auto.

Any suggestions on how to resolve this problem? Thank you.

I have a very small Tablet computer and Thunderbird is really bogged down on it. The tablet has a 32 bit processor, 1G RAM, 64G SD drive. (1) When I run TB I get many "not responding" messages from Windows. (2) Maybe 1/2 the time, if I "delete" a message the screen will freeze on the message. The message is removed from the inbox list. I have to click "X" to get rid of that screen. (3) Get Messages no longer works. When I click it, nothing happens. The status bar at the bottom remains on the last information displayed. I found that if I use View, Folders, All, I can bump TB to get messages. (Normally I use Unified Folders) The status bar will display each of the accounts it is checking and any new messages will appear. These things have been happening through many many versions of TB. Although #3 seemed fixed a few weeks ago but has returned. Same for #2.

I looked at the disk space that TB is using and found that TB is using over 10GB. See attached. I don't know why it is so large. I don't need to store any messages on this computer. I have a desktop that is my "base station" where I want to save all (but deleted) messages.

I don't know if this large amount of TB space is contributing to the problem. Any help would be appreciated.

When I click "Compact Folders", e.g. when in Inbox, all folders are compacted except the Junk folder. I need to do it again clicking on Junk folder and again "Compact Folders". Is that normal?

I have Thunderbird 115.9.0 64 bit on the 2nd latest version of Ubuntu Linux and by second latest I mean it is still supported even though there is a new version available. Several months ago there was a password problem with my internet account preventing me from logging into my internet/email service and all my devices could not send or recieve emails. I changed my password on my cell, my Windows 10 computers and they worked fine. My Thunderbird on my Ubuntu on the other hand rejected my password and I also checked all of my port and server settings with the help of my internet service provider tech support including comparing settings from other email clients. Still no password being accepted. My internet/email service provider tech agent suggested removing my account from my client and reentering it and this worked.

Several months later I changed my main email passwords again on incoming mail and outgoing mail servers on my account, verified my port settings are correct, which they were including the type of security and protocols used. When I select the desktop icon I get prompted to enter my main password and hit enter and the window keeps reoccurring as if it has rejected my password. I select cancel allowing me to enter and again clear and reenter password and again it is rejected. I removed my account (I think) and go through the motions of reinstalling my account and get a pop-up indicating the server already exists which puzzles me. Ports, security settings, password are all correct and tested on other devices. I can even use a browser and log onto my internet service providers server and access my account and my password works but not on my Thunderbird. Should I consider uninstalling and then reinstalling my Thunderbird on my Ubuntu? I think by mistake I deleted all of my emails BUT I have selected IMAP so my emails I want are still on my service providers server. IF I uninstall and reinstall how do I save my contact list. This I Inoticed is still intact. Suggestions please?

I have a M2 Max Pro MAC. I have read other posts about this and people suggest starting in safe mode doen that and it still happens. Removing all pluggins and restarting doen that and it still happens. IT doenst happem on any otehr browser.... help please?

Automatically hide taskbar in desktop mode => Enabled Firefox => Maximised When cursor is moved to outer edge of screen, taskbar should unhide (Expected behaviour) but in this case it remain hidden (Reality). Firefox along with all other spinoffs give same result. Chromium based browser works perfect, and taskbar automatically unhide itself.

As OLED screen have became common as monitor, Taskbar auto-hide is must. If this issue cann't be fixed I may have to change my primary browser which I used for almost 15 years.

Kindly, look into it. If Chromium can do it, why not Firefox.

Occasionally I will see a set of Email messages that look exactly like the one in the attachment in the message body window. When I look at them on another client, they are fine, so I think they get downloaded to my Thunderbird incorrectly. I have about 10 or 12 messages that look like this (no change at all between messages).

Two questions:

1. Is this a problem others see (I only get it once in a while, both in the beta that I stopped using and in the current version).

2. When this does happen to me, what can I do to refresh these messages? I have not found anything in any of the menus that looks like it would help. I have cleared cache.

Thank you.

When I try to use the Criterion Channel and several other websites that use cyberlocker video services, I get an error with no code (attached screenshot). Here's what I have tried to solve it with: - VPN - Clearing cache - turning off all extensions that target ads, pop-ups, and tracking; and making sure Firefox itself isn't blocking tracking - using the user-agent switch extension to pretend I'm on a different browser The last one makes me think it might be a Windows 10 problem and not a Firefox problem, but I'm just covering my bases. Any help is appreciated!

The upload photo button does nothing... on this page, on Reddit, Facebook too. I've tried clearing cache. I'm on latest android and firefox 124.2.0. I have standard security enabled and permission is set to "Ask" for camera and storage. How do I make this work again?

Dear reciever. After years of using TB and what we do think is a productive mail-tool that works for the benefits we are looking for has worked. However, the last 115- constantly freezing and shuts down. This is very annoying. It freezes at some folders from the main email-client- as we have deleted older folders integrated with this. But the problems remains. . We have done everything in our knowledge of the program but still no approvement. . At this point we are using Outlook..would be grateful to have some answers and possible sollutions for this issue. . Thanks in advance and keep up the great work U are doing. :-)

Hello, I have the following problem with the current version of Thunderbird (115.9.0 64-bit "Supernova"):

When writing an e-mail (no matter if only HTML format, or HTML and plain text) no list items are displayed (neither unsorted nor numbered).

Everything else, such as inserting tables, smileys, etc. works.

If I create a document with several list elements and sub-elements (indented elements) in Word as a test and copy this into the message in Thunderbird, the list elements are displayed from the second level onwards.

Even if I insert the whole thing as HTML code (ul, ol, li, ...) the same thing happens.

It is a fresh installation. I wanted to switch from Outlook to Thunderbird. However, this is really suboptimal:-(

Can anyone help? Many thanks and best regards Patrick

Dear Support,

suddenly my INBOX file has a size of 480GB - the mails in all my IMAP folders online is less than 4GB.

How can that happen?

Is there a fix or should I just re-create the account?

Best wishes, Johannes

I'm asking this question on a different browser because Firefox cant load any websites.

Basically whenever i open a new tab, it opens to a crashed tab. Gah. It cant even load google, or any website for that matter, not even the homepage for Firefox, its just a blank page with nothing on it, whenever i type something into the address bar and press enter it just disappears and does nothing. Browser settings work, but stuff like passwords dont, and i have most of my important passwords on firefox, so i cant log into runescape and stuff.

Can you help?

I live in Canada. I cannot open a yahoo.com account with Thunderbird. The account is recognized without any problem, but when I try to connect to the account, Thunderbird opens a Rogers dialog box which does not recognize the yahoo.com account ID.

Whenever I attempt to watch something on any streaming service, I get an error message from the streaming service and a note from Firefox saying "The WidevineCdm plugin has crashed." I have tried to solve this problem a number of ways, but have unable to find a solution.

My best guess is the problem is due to the most recent WidevineCdm update, as in the plugins settings the most recent update for the plugin was on 10/21/23, which is shortly before I first noticed the problem. I did test out various streaming platforms on other computer browsers (Chrome and Microsoft Edge) — they gave the same website errors as I got on Firefox, but those browsers did not indicate the cause or suggest which plugin failed. I additionally tested out desktop apps for some of the streaming platforms; they work fine without any issues, but unfortunately the main streaming platform I use doesn't have a desktop app and only works in browser.

My computer is a Lenovo Yoga 9i, it's running Windows 11, and everything is up-to-date.

The methods I have tried to fix this issue with, to no avail: - submitted crash reports - toggling the "play DRM restricted content" options in Firefox, and toggling whether or not the WidevineCdm was activated, closing the browser between each toggle of options - clearing Firefox's cache - running Firefox in troubleshooting mode to make sure it wasn't a different extension interfering with it - tried running Firefox in compatibility mode - tried to find support from the people who made WidevineCdm, but apparently they don't do end-user support - deleting the WidevineCdm manually from the program files for Firefox and Chrome (since Firefox says the plugin is from Google), and then reinstalling it via the chrome components page. This briefly lead to the message on the plugin page that WidevinceCdm would "begin installing shortly." It seemed frozen like that for a good while, but then I tried clicking the "check for updates" and that message disappeared, and it went back to crashing when I tried using a streaming service. - uninstalling both Chrome and Firefox, restarting the computer, then reinstalling both browsers

As far as I can tell, the plugin comes automatically installed in the browser, and there isn't an alternate plugin for decrypting DRM-restricted content. If there's a way to set the WidevineCdm to a previous version before the update that's crashing it, I haven't found it, but I am no expert in computers or coding, and my guess about it being caused by the recent update could be wrong too.

I'm at my wit's end here, any help fixing this problem is greatly appreciated.

Over the past day or two, I've seen firefox incorrectly render fonts on a couple of websites. So far, I've only noticed two websites effected: quotientapp.com and xero.com (not the actual landing page, but rather the login page and other pages available after login https://login.xero.com/identity/user/login). This problem may extend deeper but these are the only places I've found them.

At first I thought my eyes were playing tricks on me but nope, something definitely not right. No new addons have been installed on my system. I've also deleted all local storage / cookies (via the Inspector) for these sites thinking it must be some caching issue - but no, it's still doing it.

Inspecting the font-family shows the issue (this is from the page https://go.quotientapp.com/sign-in) - have attached the images below of what I see.

I do use uBlock, but it is disengaged on Quotient and Xero (these are work related sites, they show no ads). Other add-ons I have installed include Bitwarden, Dark Reader, Firefox Multi-Account Containers and Reddit enhancement suite. I've ensured all add-ons are up to date as of this posting.

FWIW I do allow all the extensions above (with the exception of Firefox Containers which I don't allow) in private mode.

Any insights on how to get to the bottom of this?

When I create a new folder in Local Folders, the new folder shows in the list and also appears in the local directory. However, if I close and then reopen TB, the newly created folder does not show in the list of folders in the Local Folder even though it still appears in the local directory, and I can see that the new folder contains data by the file size. I still have old sub-folders that I created some time ago available as normal in the Local Folder and I'm wondering if the issue may have been caused by switching from pop3 to imap a while ago as the folders I can still see were created prior to the change - but I'm guessing. Can anyone please suggest how to get the Local Folder to show the invisible folders within it after I restart? Thanks. I'm using version 115.9.0 (32-bit) on windows 10.

I want to visit http://bispebjerghospital.dk/ . I have seen on https://www.whatsmydns.net/#A/www.bispebjerghospital.dk that it's DNS isn't propagating correctly, so I turned on "MAX PROTECTION" for DNS, hoping that it would let me see the site.

But Firefox showed me "Unexpected error" the first time I went to the site. And then I clicked 'always allow' and now it just spins and spins with no response visible.

How can I visit the website from one of the countries with red X's on whatsmydns?