Thunderbird Support Forum

This is a recent issue. If I send an email with no images and no attachments, it copies the email into my "sent" folder with no problem.

If I send an email with even a small attachment...it sends the email, but "times out" copying the message to the sent folder.

I've checked the account/server settings, they are exactly as recommended. I've changed the sent files to "other"...no difference. I deleted and reinstalled Thunderbird...no change.

Ideas?

For some reason, whenever I have multiple tabs open in Thunderbird, it will seemingly randomly open a new window, interrupting whatever I'm doing. What seems to happen is that the new window will contain the tab I was working with (address book, settings, etc.) and a tab for my mail, but that mail tab will have switched to a different mailbox. And then the new window that opened behind the other one will have a tab for my mail focusing on whichever mailbox was selected before.

This is driving me absolutely crazy! It keeps interrupting what I'm doing and makes me anxious to do anything in any tabs in Thunderbird. I need to fix it!

Any idea why this is happening and what I can do to stop it?

Hi, Have tried all ways to get sending Email to work , Checked out comcast outgoing settings, went to comcast email direct and checked to make sure that 3rd party setting where correct, downgraded the thunderbird email, and reloaded the new one, nothing works!, will receive no problems just cant send. also tried the password you name it. thanks a screen shot for you to take a look at. thanks

I am using Thunderbird v 115.5.1 on a Windows 10 system. I am using an "@hotmail.com" email address. I seem to be able to receive emails just fine, but face an issue sending out emails. When I press "send", it gets stuck on "sending message" for quite a while, then I see the error message:

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Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) smtp.office365.com timed out. Try again.

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My SMTP settings: Server Name: smtp.office365.com Port: 587 Connection Security: STARTTLS Authentication Method: OAuth2

Appreciate any help! :)

greetings to the forum. TB 115.7.0 (64 bit) on windows 10, 32 GB RAM, intel i7-6700 CPU@3.40GHz I signed up for an account on the newsserver astraweb.com which has a very high message retention, around 21 years in the groups I subscribed to!!! in two groups I subscribed to, it downloaded 1410000 and 3031000 headers (no messages)... since after this massive download it was slow and unresponsive often, I repaired the folders of those groups and deleted the startup cache... in response the TB re-downloaded everything again, remained not responding for about 20 minutes and during this process used over 20 GB of RAM memory (see attached image). now it's using about 8.5 GB RAM, but every time I click on one group or another of astraweb it freezes with a "not responding" message until some mysterious task finishes... I could try to limit the number of headers downloaded in the account settings but I will only do it if I have to... If I don't find some solution, this way TB is almost unusable...

before posting on bugzilla and before deleting the older headers, do you think there is anything else I can do to avoid freezing TB on that server?

• • So when is the very nice team from Thunderbird gonna solve duplicates issues once and for all? **

Mailer service is gMail. Incoming as normal as POP3. Never see duplicates at my mail account service gMail. Thunderbird version is 115.4.1 (64-bit). Platform is MacBook Pro. OS is Apple macOS Ventura Version 13.6.1 (22G313)

• • Or should I trash Thunderbird for ever? **

Joke, but we all need to have a certain grade of stability. Tired of suffering the nasty issue. Happening as of now since months ago.

Love Thunderbird, guys please commit. Cheers

Since the latest thunderbird update 115 I have multiple crashes & black screens, before this it was very stable. I have been using this since 2015 I think with little problem until now. If nobody else is having problems with 115 perhaps I should just use windows restore to go back to Dec 10th 2023. The only alteration to settings I made to try and fix it was to untick "use hardware acceleration when available". It made no difference.

Since the dawn of time, the Compact folder command on the folder context menu has compacted just the selected folder. However, I have noticed that in the latest Thunderbird version (I'm using 115.6.1) the Compact folder starts automatically compacting all subfolders under the current one. This is a big problem for me: under the inbox, which I need to compact fairly often because all messages pass through it, I have literally hundreds of subfolders, some of them dating from more than 20 years ago, when I used Netscape Communicator. Those folders are "read only" (I only have them for reference), and I do not want to modify them in any way, to avoid risking their contents. Thus, I DO NEED for Thunderbird to stop compacting subfolders automatically. Is it possible? How can it be done?

Also, after a folder compacting has started, what's the best way of cancelling it, short of closing Thunderbird? I understand that the compaction process is quite safe, as it copies all data to a fresh file, but would rather not risk data loss.

Hello, After update Thunderbird quick filter became very very slow.

If you type in quick filter field two words. At the beginning is being shown random results not connected with typed in words. Then in 30 seconds or later are being loaded correct results. Not possible to use like this. It's local search on normal PC (with CPU AMD Ryzen 5 PRO 4650G, 24GB RAM) filtering must to work fast. Could you fix that issue?

Thank you

Suddenly today Thunderbird won't access either of our Hotmail accounts. Error message reads "Login to server imap-mail.outlook.com with username my.name@hotmail.com failed." After several prompts to Retry/Enter New Password/Cancel, I even put the correct password in with no success and eventually received another message "Server has disconnected. The server may have gone down or there may be a network problem." Neither of these are true: I can access the server on my browser so I know the password is correct. Both my late husband's and my hotmail accounts are affected this way. Help! I am nearly 80 and not terribly computer literate and somebody else set Thunderbird up for me years ago because I wanted to be able to archive my messages locally (offline) and now it's suddenly stopped working.

Hi, my mailbox on the server is set to 5Gb. However the size of the IMAP directory of this mailbox on my hard disc is almost 22Gb. Sometimes I occured the situation that the mailbox's size on server lik 500Mb the IMAP catalogue took 80Gb of disk space. What might be the reason. Using 'cleaning' option does not help. Any thoughts? Mirek

For the last few weeks, I have had a strange problem with Thunderbird. I receive an email that shows in the email list with the subject, from, and date of the real email. However, the body of the email is from some other email, and corrupted at that. I showed one jpg that shows the email listing, and 3 jpgs that capture how the first part of the email appears in Thunderbird. Even though I don't have the headers expanded, I see detailed header-type information. I captured down to where the body of the message starts in case something in all that apparent expanded header provides a clue. When I look at the email on my Google web account, it is fine. It only shows this way in Thunderbird. It has only happened about 3 times in the last 2-3 weeks. The body I see, by the way, seems to be the same every time. I am hoping someone has some ideas.

In most cases, it has been an email I did not really need anyway, so I just deleted it. One was a needed email, so I opened it in the Google web interface and forwarded it to a different account, where it showed fine.

Thanks again for any advice. I am currently using TB 115.6.0 in Windows 10. However, it has happened on the earlier versions I had over those past couple of weeks.

I've been through all related articles in this forum to try to resolve this issue, as the popup keeps popping up.

This is what I've checked and did; 1- Checked Outgoing server (SMTP) settings - No trace of account there. 2- Produced a 'Troubleshooting Information" report; Nothing under 'Mail and News Accounts' 3- I've deleted my Calendar and made a new one. 4- Got HostGator on the phone and they confirm that my account is close and files deleted.

And it is still not resolved. Anyone knows how to resolve this issue ? Thanks

Excuse my basic tech knowledge....

Thunderbird is clogging up my drive with over 200gb of files and now I am getting constant messages about not being able to get emails because of a lack of disk space.

My xul.dll file is 121 GB and my omni.ja file is 80 GB.

I have multiple nstmp folders (x15 at last count) that seem to be the problem.

Every time I try to delete them though, I am getting a blue screen computer crash...... even in safe mode.

How can I delete those files manually?

If I reinstall Thunderbird, won't it just keep all my files/folders which won't solve my problem?

Thunderbird can't seem to remember who I am! For the past year or so, every few weeks, I open Thunderbird to find that it doesn't know who I am. My entire account has seemingly disappeared! The first time this happened, I nearly lost it. I thought everything was gone. After doing some research, I discovered the likely problem was that the prefs.js file in my profile folder was corrupted. Going back to a backup (thank goodness for backups!) and copying an older version of prefs.js to replace the corrupted one fixed the problem - all my emails and folders were back as they were before. Whew! Until it happened again. And again, and again, and again, etc., etc.

Since this is a well known problem (I found the "fix" noted above in Mozilla help), I assumed at some point there would be a permanent fix. But several iterations of Thunderbird have come and gone since then and the problem remains. I have used Thunderbird for nearly 20 years, and have loved it. But if I don't find a solution for this problem, I may have to abandon the platform. I can't afford to have my email client forget me every few weeks. Resetting the prefs.js file takes time, and alarmingly it doesn't always work! A few times I found my backup prefs.js also failed and had to rely on an even older backup which can sometimes be problematic if I changed any settings in the interval in between. I REALLY hope someone has found a more permanent solution to this issue! If you have, please post it and let us know where to find the cure for Thunderbirdheimer's!!

I made a backup of the email, but now when I try to restore the backup, it gives me the error "Unable to open the summary file for Inbox on email@example.com. Perhaps there was an error on disk, or the full path is too long."

I did the repair folder but the error shows up again, I reinstalled thunderbird, the error is the same again.

Can someone tell me how to do a restore backup?

Thanks