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I have been struggling with slowness in Thunderbird in recent months (Windows 11, mid-range Lenovo laptop). There is often a distinct lag during even the smallest operations.

Examples are: selecting an email, closing a tab, typing, calendar events editing.

TB process in Windows usually uses 1000MB RAM. RAM is around 60-70% usage usually. I never have the same slowness issues with other applications.

I tried quite a bit: safe mode testing, removing extensions, compacting folders and more tips. I ended up removing Thunderbird and my profile entirely, and reinstalled the latest version with an empty profile. I just set up my Gmail and other email account. No extensions installed, yet still the same issue.

Could it be that something is still there from a previous install, if I removed my profile?

I've been using Thunderbird in Linux and Windows for years with moderate issues that I was able to resolve, but am now really puzzled. Please help.

Hello

Yesterday there was update in Thunderbird and went well. But today, Thunderbird suddenly asking for credentials and then it went totally blank as in screenshot. There is nothing at all. But incoming mails are still showing up in windows notification and it can be opened as new tab of Thunderbird. I have been searching the possible cause and solution from forum and internet, but no luck. Can someone please help me about this ?

Bug forever (years, versions, reinstallations).

Failure by filters whose action is to DELETE. As stated in subject. Uncomplicated.

Other filters work (they distribute msgs into specified folders).

Computer crashed. After restoring, Google calendar is not syncing. No error message that I can see. I unsubscribed and resubscribed to no avail. I have no clue what to look for and searching here is not helping as all the references to this are years old. Can someone help me figure out why this is happening?

I am running Supernova version 115.5.2 and have a strange situation (maybe it's normal) when opening it.

If I have received any emails for any account in a previous session, then when I open a new session, the folders for these accounts open expanded and other accounts that did not receive any emails, remain collapsed.

I know there are others who have various issues regarding all folders expanded or collapsed but in Thunderbird before Supernova, I always collapsed all my folders and opened a new session with everything collapsed.

So can anyone tell me how to set-up Supernova so that when I collapse all my folders at the end of a session, a new session will open with all the folders still collapsed?

Thanks.

Hello, I did look for related posts but found nothing close enough to this so I thought I would create a post. I don't ever recall having this issue before v102 was introduced but now it happens once in a while but not always.

If I am in the inbox of my main mail account and choose to delete a message, it goes away and then reappears almost immediately. There is a box that shows up at the bottom right of the screen that says: The current operation on inbox did not succeed. The mail server for account (my main mail account is shown) responded: UID MOVE failed. This account is in Canada on the Bell Canada network so perhaps it is an ISP issue?

I have 3 mail accounts set up - all IMAP. If I close TB and reopen it, the message is gone as if it required the program to close in order to complete the delete request.

If anyone has experienced this and has any suggestions or tips, it will be greatly appreciated. - Thanks, Mike

As stated in the question, messages older than 1000 days are not deleted (this is a POP server). This is on my Desktop which is my primary PC. I also have a laptop using Thunderbird with "Leave messages on server" but with neither option (Number of days or Until I delete them) checked. The purpose of the laptop settings is that since it is not my primary PC I don't want it to delete anything from the server.

I did quite a few searches and the closest thing I found was another user who had migrated to Thunderbird after using another mail client for years, and it sounded like after they installed Thunderbird, they imported their old emails from the old client and then began using Thunderbird. The explanation they got was that any emails that had not been downloaded from the server by Thunderbird would not have a download date in Thunderbird and would therefore not be subject to the "older than xxx days" setting. That scenario doesn't apply to me because I have been using Thunderbird exclusively for at least 5 years, so all emails on the server that are less than ~1825 days (5 x 365) were downloaded by Thunderbird. All emails older than 5 years have long since been deleted from the server manually.

Either I am misunderstanding the "For at most xxx days" setting or something is not working properly.

Today, most of messages have suddenly disappeared from my TB inbox, leaving only the most recent 105 out of approx. 18,000. I have not performed any operations (compacting, archiving...) that could have caused this.

I immediately invoked the 'Repair Folder' command, which did not resolve the problem. Further investigation revealed that the 'Inbox' file ('Profiles' folder) actually contains only 105 messages - seems like the 'Repair Folder' truncated the file!

Fortunately, all the messages are still on the server. My question: Is there a method to 'force' reloading of the missing messages?

Thanks, Ray

I got this error message and don't know what to do with it. All the other subs under gmail (sent, all mail, etc) are fine. No current inbound gmail displays under "inbox," though it does in "all mail." While checking by using gmail app, everything seems fine. How can I reopen or repopulate my inbox? Thanks.

Using 115.10.1 and POP on Windows 10 Pro (v. 22H2) with just the Windows built-in virus protection enabled (but App or Browser Control is disabled). Platform seems stable, no evidence of nefarious services noted in task manager.

Realized the emails in InBox from a couple of days ago (and going back decades) were blank or had mismatched headers to content. Figured an index problem. Ran the Repair under 'InBox' folder Properties, and only a few of the most recent emails remain - all duplicates of which I had sorted into other folders.

All the other folders are fine - just my InBox got wiped! Looked in the Thunderbird folder under profiles and saw the above captioned with a time-stamp that captures the approximate time this went down - occum's razor. I did not initiate any update to Thunderbird.

Walking on eggshells and very nervous, we're talking thousands of emails, what is the recommended recovery of the InBox (after I attempt to backup what I have left). Thanks!

So running thunderbird 115.10.1 (64-bit) and more and more issues:

• the app keeps getting non-responsive for long period of time, to fix this I have to force quit the app.
• at times when composing an email the app freezes where no typing occurs for seconds or typing is very slow or after typing awhile the text suddenly appears.

Seems to be happening more and more trying to figure out how it can return back to it's rockstar state when it was <99 version.

any help would be appreciated.

I have set up my own domain guytec.org using Namecheap. The alias for email is tguy. I have pointed this new email to my gmail address. I can receive emails into my thunderbird Gmail box from tguy@guytec.org. I want to write emails with sent from tguy@guytec.org showing? How??

Running Thunderbird 115.10.1 on Mac OS Catalina 10.15.7. Mail stopped communicating. Tried using the "Access Account Setup" for existing Email. Put in full name, email address and password and clicked continue to have Thunderbird configure the settings automatically. Did not work with auto settings (POP3). Went back to "Access Account Setup" for Existing Email and instead of clicking continue, I selected "Configure manually". Tried putting in the IMAP protocols and correct port settings, but the "Done" button is grayed out. I am at a loss of what to do to get my email back up and running and at the same time don't want to lose and emails/folders that are currently set up. Any help would be great.

Thanks

Just switching between inboxes can cause up to a 10 second delay with Thundebird "not responding" with the spinning wheel. It has been like this for the last few laptops I've had and through all the updates and I am getting ready to call it quits. I did a performance recording of me just clicking through the different folders and then it locks up on one. You can see it here https://share.firefox.dev/3WlrRi9

I am using a primary gmail imap account, an office 365 imap account, and another imap account from an ISP.

On Win 10 LTSC, CPU: 16 x 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz @ 2304 MHz 10240 KB Cache, MEM: 65277 MB, 60% (39120 MB) free, GFX: NVIDIA GeForce RTX 3080 Laptop GPU 16192 MB

Normally when you starting to write a new email, Thunderbird will set the 'from' address to the address of the account whose mailbox you're current browsing.

However, I have a saved search that entirely contains email from my secondary (work) account, but if I start a new email while browsing it, it picks my default (home) email address. This has caused me to accidentally send emails from the wrong address more than once!

Is there any way to change it so that it'll set the 'from' field of new emails to my work email when browsing that specific saved search?

I have not had access to my email since the April 18 Thunderbird update, receiving this error message: "After changing password on an IMAP account, the account could become locked due to too many failed login attempts" How do I fix it? Please email me at jjhpor@gmail.com because my primary email, using Thunderbird, does not work (See above) Thank you Jim Housman

Hello,

I have just imported my old email from Outlook to TB Local Folders. Everything works out except some of the email (not all) show a wrong date in the email list. The date show a future date like 2/7/2101, 6:28 AM. Please check the attached image. Any idea?