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Considering migrating from Outlook to Thunderbird (TB), as it is a logical potential path. Best I can tell from AI input is placing my message store on a network share (colocated, stable network), would likely be unreliable. Said that TB storage format was basically fragile and subject to corruption if there was any kind of hiccup in the data transfer or if something happened during a power outage for example. Wanted to see how the real community felt about that and if it was indeed inadvisable to do so.

Thunderbird functions normally (sends/receives), except after Windows 11 goes to sleep, I log back in without difficulty., but attempting to use Thunderbird to send email fails with the message

"Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.mail.me.com failed. The server may be unavailable or is refusing SMTP connections. "

There's no prompt to re-enter the primary password, and the only way to restore normal Thunderbird operation is by rebooting WIN 11. Is this a known bug with a workaround? The failure occurs whether the outgoing server is smtp.mail.me.com (Apple), smtp.comcast.net, or smtp.gmail.com

Today i moved mails between folders. The move was successful, as confirmed by the webmailer. However Thunderbird stopped displaying these messages. Instead i got several popups, that the server is not available.

I have 2 issues with that:

First: Popups are disruptive. Especially when they block interaction with Thunderbird. Especially when using a tiling windowmanager(sway). Especially when there are multiple, which need to be closed in a specific order, because interaction is blocked by the newer popups.

How can i block these popups? Disable sync is not a reasonable option.

Second: Why did thunderbird not display the moved messages? Is it a bug? Or a config issue?

Every time I open thunderbird I get a blank screen with this message, 'Edge: Too many requests' over the top of the thunderbird screen. This screen stays on my desktop after I close Thunderbird and I have to change my screen resolution in order to close the screen. Can you help please? Martyn Smith

I have been using Thunderbird for many years. I have 4 accounts that have all been set up and working fine. This morning the 2 yahoo.com accounts stopped working. I logged in to the impacted accounts using a web browser and password just fine. I then updated Thunderbird to 116.0 to see if that would fix the problem, but it did not. The outlook and gmail accounts are working fine, for now.

When Thunderbird attempts to download mail for the yahoo accounts, I get a large pop-up window with "Edge: Too Many Requests". The pop-up window is blank except for that error message. I get the small pop-up with the Authentication Failure message. Sometimes I get Retry, Enter Password or Cancel. But I never see a window that will allow me to enter my password.

I can send/receive mail from the accounts while logged in via a browser but authentication fails within Thunderbird.

I use Thunderbird when Postbox acquired another. I am using 2 computers - desktop, old (10+ years), still Windows 10, and 2 two emails; new laptop (traveling), Windows 11. I download Thunderbird and set up my accounts - gmail.com and twc.com. Troubles with gmail.com, but finally I set up. However, I can't set up twc.com. I like twc.com-- no reason. (Time Warner Cable (twc) bought Spectrum. ) I can login twc.com webmail. Not Thunderbird. I looked carefully set up, Thunderbird searched, found "Host: mobile.charter.net" (Huh?, , continue, enter my password - "Error: ---". I removed VPN Windows 11, no difference. (Curios, my laptop and Firefox, my bank rejected connection. My desktop and Firefox still connects! I dread the day must update.)

I am look forward yours reply. (Maybe Spectrum is searching to dump twc.com.) Jeremy Fields P.S. I wrote with my desktop - windows 10 -, my new laptop (windows 11) is problems

The system was working fine. The next day, when starting Thunderbird (TB, the status line shows logging in to server but loops; no errors or messages, Thunderbird is 'locked out' spinning. I see the normal INBOX page, but logging in never completes. NO CHANGES were made to TB accounts or settings. I have re-installed TB, re-booted, but no change. I cannot check/change any of the accounts or do any further 'debugging' because TB is spinning. The server login is fine because Webmail can be used. Internet connection is fine, because browser works. 1. How can I stop TB from trying to login at start up? 2. What could/would cause this behaviour?

Any suggestions much appreciated.

Proszę o pomoc. W pracy na wifi program nie chce mi się połączyć z serwerem poczty. Jeśli połączę komputer z inną siecią wifi nie ma pproblemu program łączy się z serwerem poczty i bez problemu pobiera i wysyła pocztę

Hi, When i start the TB-client on a win10 desctop there will be an Authentication error connecting to server imap.gmail.com.

from Google: 400. An error has occurred, The server cannot process the request because its format is incorrect. The request should not be made again. Unfortunately, we don't know more than that!

It still seems like the email arrives to the gmail account. But it turns out that the email doesn't always arrive via sync. Do you see any problems with the TB and gmail connection?

For the moment I don't know the Thunderbird version, I will be back.

TIA, /Leo

It was working fine on the new computer until yesterday. Now I get a pop-up box that says: ' Unable to connect The connection was refused when attempting to contact localhost.

The site could be temporarily unavailable or too busy. Try again in a few moments.

If you are unable to load any pages, check your computer's network connection. If your computer or network is protected by a firewall or proxy, make sure Thunderbird is permitted to access the web.

Hello, since 2 weeks the IMAP settings don't work. I didn't change anything with the accounts. Regularly I had to update the settings on my android version and it works well. But on my windows version ou on my linux version it doesn't work. I enter different name (the surname only, user name, or the mail address or name and surname). I tried all the options but it didin't word. I stopped trying last week on Thursday and tried again friday afternoon. I tried again several options and it works until saturday. Again I didn't change anything. I receive the notifications (in french) : "can't access the server outlook.office365.com" for the accounts. It was on my windows version AND on my linux version. I really don't know how I can fix it. I cleared the cache several times. Verified the server names. Today I serched for the settings on outlook for the IMAP server but didn't find how to change or disable it (the option were not visible on the setting page). I deleted the accounts to add them later but when the windows popup open even if I enter my password, and the code (if necessary) thunderbird send a message like "error. verify the id, username, address or password". I tried with the new thunderbird version on windows (because mine was old) - didn't work either. I don't know what to do or try now.

I have the android version and it works well, but this is on a secondary device and I absolutely need my mails on my main device and I really love using thunderbird. I even installed it on my kids devices. I really don't want to install another email client.... and absolutely not outlook T-T.... My thunderbird on linux is updated and didn't work too. But it's on my main device too, so if you can help me make it work on linux, I'll be happy ^-^.

I thought it was a connexion problem but even when I change it, it didn't work (on windows or linux).

Please can you help me fix this problem ?

Edit : Just wanted to add that the version on Linux (Mint) is the 140.12.0esr

I have four different email accounts. A week ago, all incoming and outgoing traffic suddenly stopped . Webmail works normally. I have no viruses, trojans, etc. I deleted one of the accounts and tried reinstalling it. I can't do it anymore. The system keeps responding: "Unable to authenticate to the server. Username or password configuration may be incorrect." But they are all abolutely correct. I don't know what else to do. Any clue? Thanks

[Edit:] I'm using Kubuntu with Thunderbird installed via flatpak using the flathub repo.

When attempting to add my calendars on our Nextcloud server, I can't get further then the second dialog.

Steps to reproduce: 1. New account > Calendar 2. Select "On the network" 3. Enter the correct user name and address (I did try the server address AND both CalDAV addresses presented in the calendar settings on the Nextcloud web app). 4. Press "Search for calendars" 5. After an extended period of time a dialog with a title "Adding a security exception" appears, claiming, that our Nextcloud site does not have a correct certificate (it does).

This is where the journey ends. If you add an exception, the dialog disappears and you are still at number 3. Trying again will produce the same result. Funny thing is, that you can press the button "Load certificate" in the "exception dialog" and then the same dialog will declare that our site does indeed have a correct certificate! But it will only allow you to close the dialog and you are still at number 3 and without any chance to add your calendars.

This is a completely new installation of Thunderbird. There are other folks that are using Thunderbird with their calendars on the same Nextcloud server and everything works happily. I presume this is a bug with the newer version of Thunderbird or something of that sort.

My BT Mail (premium account) stopped working in Thunderbird about a month ago. I've been using it for many years without a problem, so can't understand what has changed. I'm using it on a desktop with Windows 11.

I had a long session with a tech person from BT, who couldn't find anything wrong. All the IMAP settings are correct. I have removed the saved passwords in Thunderbird and changed them via the webmail platform. I have uninstalled the account and tried to reinstall it but it won't set up the account at all now.

It works perfectly on Webmail and on my iphone so it must be something to do with Thunderbird itself.

I have thousands of emails saved so any help would be appreciated.

I have been using Thunderbird email for years. Recently, I have gotten this error message: Connection to server mail.5starpros.com:465 failed. I have checked all the settings and they are right for my domain. I called the hosting service to check for email on their end and everything is fine. This message is blocking my domain at 5starpros.com. But, in Outlook on the same computer the same email address is working just fine. Thunderbird has the same settings and is getting my email. Is like my PC is blocking my email address. Can anyone help me with this. It is very distressing.

I keep getting prompt with this message stating the current config is set to block cookies (attached screenshot) and is occurring every interval. I had updated the app yesterday, some how after restarting the computer, it's popping up with the message.

I have been using Thunderbird for years. Suddenly, a couple of days ago, the sent and trash folders no longer show the emails in them. When I use Roundcube online, these files show up there as normal.

I have done considerable research online to solve this problem to no avail. Using AI, they suggest a number of things that I have tried, without solving the problem. Apparently, this is somewhat common. I finally got to deleting the send.msf and trash .msf. This did nothing to solve the problem.

This is very frustrating. What can I try next? I am using Win 11 and Version 152.

Carl