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I'm using Thunderbird 115.18.0 and just today it's behaving bizarrely. Crashed twice for no reason, and emails are taking "forever" to delete -- normally they delete immediately (unless they have an enormous attachment), but today I have to wait about 4 seconds for one short text only email to delete. Compacted folders, and made no difference.

Any ideas? Anything I can do to return to my normal I love Thunderbird condition?

Thanks.

I AM RUNNING WINDOWS 10 ON THIS COMPUTER AND I FIND YOUR UP DATES EITHER STOP FIREFOX FROM WORKING OR LOADING PAGES AND I AM TIRED OF THIS...

FIX YOUR BROWSER SO I CAN USE IT OF I WILL FIND ONE THAT WORKS. I AM SITTING HERE WATCHING WHAT USED TO BE AOL'S OLD LOGO MOTION...

''''PLEASE FIX IT OR LET ME KNOW OF A BROWSER THAT WORKS OR I WILL FIND IT MYSELF''''.

Thunderbird is downloaded new messages, but I can only see the Welcome to Freedom screen and cannot click into and see any emails in any folder. I see that numerous emails were downloaded, some going to the inbox, other into the spam folder. However, when I try to view them, all I see is the Thunderbird "Welcome to Freedom" main screen and cannot view any emails in any folders. Clicking onto different emails and their folders all show that same main screen.

suddenly it's taking minutes to send an email - if it sends at all. Many times I get a 'failed' pop up window but when I click SEND again it will sometimes go through. Also Some of my emails aren't coming up - only a few of them. And they aren't un-bolding.

I have had Thunderbird from the time I acquired my Mac computer. This week it started to do something new. After a restart I opened Thunderbird. A box came up that says across the top System Integration. The cursor balloons, and hasn't stopped for the time I powered the computer, as least fifteen minutes. You know how the program icons are in a dock across the bottom. With other browsers open, hitting the Thunderbird icon doesn't bring its window into the forefront. This needs either a reset, or possibly a backup first. Is there a quicker way to fix this? Thanks in advance. I am not using a VPN; but I also have Thunderbird on my Windows 11. You might have seen a more recent thread on that installation. I included a screenshot. It was easier here to do that than on the Windows 11. On the Mac, I just had to use Activity Monitor to close out of Thunderbird in order to get its version.

When seaching the browser will show the result for a split second and then crash. This is a private browser and can not be reloaded. Sending an error report to Mozilla.

When searching for "woolworth sarina". the browser does crash. Same thing happened yesterday when serching for "corona specials mackay"

What is the issue? This never happened before. I reinstalled Firefox Focus and did get the same result.

I download my e-mail from Yahoo using POP3 and OAuth authentication. Downloading works fine until I reach a particular e-mail. Thunderbird says "Downloading message 27 of 52" (or whatever) and then it will stall and eventually timeout. When I go into Yahoo webmail and archive the next message out of the inbox, the rest of the e-mails download.

I know exactly which e-mails can't be downloaded. They are from my Moen Flo account (a device that monitors water use at my house). It is not spam, and it is vital that I receive these e-mails. So identifying the problem e-mails and deleting them via Webmail will allow Thunderbird to download the rest of my e-mail, but it doesn't solve the problem. I saw someone else on the forum had the same problem with USPS tracking e-mails. There are probably more legit e-mails that cause Thunderbird to choke.

Having to go in to webmail every day and delete every legit e-mail that causes the downloading to fail is not a solution. If the e-mail client doesn't work unless you go into webmail first, then what's the point?

Not an ISP problem - I can download with another e-mail client through the same network.

Not an antivirus/firewall problem - I tried it even after uninstalling antivirus and turning off Windows Defender.

This is definitely a Thunderbird problem. I am 30-year IT professional and I have tried everything to narrow it down to this.

So how can we get the developers to look at whatever combination of characters is causing Thunderbird to choke when attempting to download e-mail? I have sample e-mails that reliably cause the problem.

Thank you.

When I went to open Thunderbird this morning it told me the programme was already running. It certainly was. There were an infinite number of Thunderbirds running! After failing to close them all, I closed down the computer and started it again. Thunderbird was veryslow to load and when it did, the display for my inbox was of emails from four years ago. I strted to scroll down using the mouse but then I noticed it was scrolling by itself. Eventually it reached today and had downloaded some messages.

The system is though running very slowly, it takes a while for a message to open and messages which I have left open at the top of the screen for action are not showing subject or content. I operate a complicated system of filing in subfolders of messages I need to keep for reference and the subfolders seem to be ok.

I started using Thunderbird many years ago when a IT friend recommended it because, unlike Outlook, Thunderbird has an infinite capacity. I am wondering however if I have taken that too literally? I must have thousands of emails in my IN box going back years, plus a structure of some subfolders which are never used. Is that likely to be why I am having problems and would I be well advised to do a bit of a mega clear out? Advice please from the more tehnically skilled would be much appreciated! Carol

I see others are having this same issue with no resolution in sight.

The company I work at is unable to print anything through the print preview in Thunderbird. The current work around is to download, open, then print the file.

Does anyone have any further information on this subject besides going through separate avenues to fix the problem?

Thanks!

Sending email has gotten very slow even for text messages. This started happening a few weeks ago & I didn’t think much about it. But something is not right.

I hit send & the little status window just sits there “Status: Sending Message”. The Progress bar shows all blue as if the email has been sent. But the screen just sits there.

This is on 3 different profiles where I have deleted trash & compacted folders.

If I login to the AT&T website & send messages they go through in a flash. Just like they used to do with Thunderbird.

I'm presuming the issue is with Thunderbird (vers 91.13.1). However I have not changed anything.

What could be affecting multiple profiles? Any suggestions how to fix this? Thanks

Hi everyone, I’ve been using Thunderbird on Android for emails, and I’ve noticed that notifications sometimes get delayed when I’m gaming on my phone. During longer gaming sessions, emails don’t show up right away and only appear after I exit the game or switch apps.

I’m guessing it might be related to background app restrictions or battery optimization, but I’m not completely sure. I’ve also noticed something similar while playing heavier or modded versions of Stick War: Legacy (https://stickwarmods.com/), where the game tends to keep the phone more “locked into performance mode,” and background apps (like email clients) seem to get deprioritized. In those cases, notifications also feel delayed until I minimize or close the game, which makes me think it’s more about Android’s background process management during sustained gaming sessions rather than the email app itself.

Has anyone else experienced delayed notifications with Thunderbird Android while gaming? Any tips on keeping notifications timely without affecting game performance would be really helpful.

This post is more for posterity than asking for a solution because all similar topics ended up being Avast antivirus interfering or something less nefarious.

In my case eM client started having this problem first, then I switched to TB, but the same issue here. Of all places, the best clue was found on [[Linux mint|https://forums.linuxmint.com/viewtopic.php?t=213352]] forums. It was a permission problem. Right click on C:\Program Files\Mozilla Thunderbird -> properties -> security. I did two things and not sure which one did it, but they pretty much achieve the same. ...

The Users group in the list only had read permissions so I gave it full access to the folder and checked the option to set the same permission changes to all subfolders. I also added my own personal user to that list and gave that full permissions. Oh yeah, also changed owner to myself from whatever default windows group was there before.

Now, do I know the full repercussions of doing this? No. Pretty sure this just created a security hole inside my C drive, but... I don't really care at this point. If I had to fix this again, a solution might be to instruct TB to store the the email files somewhere else rather than where it is installed itself (somewhere less locked down than Program Files).

Hello, we have the issue, that Firefox esr 153.1.0 crashes on opening urls. The crashes happen on several devices. These are the current crash-reports: bp-3e6bd41b-89b0-4a49-9479-90cbc0260831 bp-9bd858e0-2573-4a01-8bac-90c320260831 bp-ad358921-a24d-4e02-9ed5-2bc4d0260831 bp-0bfb15d0-b637-48b6-a445-94b350260831 bp-0dc0dbcb-fb77-4ce6-a1c0-659f40260831 bp-268bf05a-3eb7-493e-bd40-42e0c0260831 bp-3910ddb1-9dbd-4016-b421-0dd450260831

thanks for Help and advice.

Best Regards

Felix

Firefox was running very slowly on my computer. Web pages take a long time to load and sometimes Firefox becomes unresponsive. I have restarted Firefox, but the problem is still happening. Please help me fix this issue.

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.