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So I just changed hosting companies and now I can't access ANY of my emails in Thunderbird to change my incoming and outgoing server settings because the failed login messages keep coming up so fast I can't get past them. I can't be the only one who's ever had this happen. Is there a workaround?

I have 2 email accounts on TB, one is a hotmail account and one is an msn account. MSN account works fine. Hotmail account on my iphone works fine both sending and receiving messages. On Thunderbird my hotmail account receives messages but if I try to "reply" to a message or if I try to send a new message using the hotmail account I receive the following message. When I checked my version it says I'm using Mozilla/5.0 Windows NT10.0 WOW 64, rv: 52.0 gecko/20100101 Thunderbird/52.3.0

An error occurred while sending mail. The mail server responded: 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 16.55847:BD0B0000, 17.43559:00000000A0000000000000000000000000000000, 20.52176:140F4D8011004010F1030000, 20.50032:140F4D8081174010F1030000, 0.35180:140F4D80, 255.23226:F1030000, 255.27962:7A000000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:80030400, 16.55847:98000000, 17.43559:0000000068010000000000000000000000000000, 20.52176:140F4D801100F01F140F4D80, 20.50032:140F4D808117F01F2C000000, 0.35180:7D110000, 255.23226:00000000, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:00000000, 4.21921:DC040000, 255.27962:FA000000, 255.1494:140F4D80, 0.37692:AD000000, 0.37948:AD000000, 5.33852:00000000534D545000000000, 4.56248:DC040000, 7.40748:010000000000010B31373A44, 7.57132:00000000000000003A633962, 1.63016:32000000, 4.39640:DC040000, 8.45434:00010200C901F8B500000000000000001A010480, 5.10786:0000000031352E32302E303037372E3031373A444D35505231374D42313038323A63396231653232372D663432632D343833612D613332612D34353732333736386438306200F90F05000780, 255.1750:80030400, 255.31418:140F4D80, 0.22753:80030400, 255.21817:DC040000, 4.60547:DC040000, 0.21966:2C000000, 4.30158:DC040000 <00a4d544-836b-0fd1-cc78-480e216372c2@hotmail.com> [Hostname=DM5PR17MB1082.namprd17.prod.outlook.com]. Please check the message and try again.

Running win 7 Pro. Previous beta was running fine. Accepted the offered update and now the program won't load. Uninstalled and reinstalled , still no load. Process explorer shows the thunderbird.exe process running. I have exempted relevant folders from antivirus scope.

Hello, I recently deleted all my emails by accident, but have read that they are still in the mbox file. I have changed the x-mozilla-status to 0000, and I have broken the file up into six parts to make it editable on VIM.

The file is all over the place... blank lines missing, names missing.... but the file is recognised in Thunderbird and shows a few hundred of the emails...

By dividing up the inbox, each of the smaller files shows about 350 or so emails. But not all. The importing seems to stop after a multi-part mime message... no messages after that are recognised.

I have found python scripts like mboxsplit.py that say they will separate the mbox into individual emails, but it is also not recognising the emails after the mime fault.

Does anyone know of a code that will just recognise the From - line and split that way?

I can't find any splitting solutions that don't try to read messages or understand mboxdr format. I just want to separate text, save as different files.

I have a fresh install of Thunderbird on Windows 7 Pro 64-bit using original default profile with two mail accounts configured correctly and both set to store messages in Local Folders. Clicking 'Get Messages' on toolbar does nothing - retrieval is not even attempted according to status bar. However, I can retrieve messages by clicking the 'Get Messages' dropdown and selecting each individual account.

My previous installation on Windows XP was able to check all configured accounts by simply clicking 'Get Messages'.

It has been one year, and you still have not fixed the multiselect functionality that was ruined with your Supernova "update" (which is worse in almost all aspects btw). Can you at least tell us WHEN you plan to release the fix since you locked the comments to block the countless negative ones? Is it so hard for your UX team to understand that removing multiselect functionality is like removing Ctrl+C, and Ctrl+V and set the correct priority???

Hi. Today, at the end of my work session, I have cleaned my computer with 'CCleaner' and then I have switched off my computer. When I have turned on it, both firefox and thunderbird have restarted themselves as if I had just installed them. Firefox never mind because there are still all the bookmarks, but thunderbird show me the initial settings. How I can solve this problem? I have a backup, but it hasn't been updated recently.

I am using Thunderbird 115.10.1 on Windows 11. T keeps deleting my saved passwords. T takes a very long time to load. There are no saved passwords and I enter them all with the options to save. I check the passwords in Settings and they are all there correctly. When I next run Thunderbird it may or may not have them still saved. I check the Settings and they have gone; so I enter them again and they are saved OK. But then they are deleted some time later. I cannot see any pattern in the failure. I wonder if there is a problem with the outgoing server setttings. All the passwords are lost whether imap, pop (Ionos), hotmail or yahoo. Is there a way to clear out my profile or is this a problem with this T release. it did not happen until about 1-2 months ago. My profile is on a local NAS. Generally T seems to be quite unstable ; I get Not Responding too often.. Thanks

Hi folks,

Issue: IMAP folders do not show up in file tree despite being subscribed to AND 'show only subscribed' being unchecked

Scenario: 32bit release channel, issue exists on multiple (all tested) machines, tested with all addons disabled

Long explanation: Been I've been suffering this issue for months hoping updates would fix it. Having searched here thoroughly and found nobody else reporting my issue I wondered if perhaps my configuration had become corrupted across all machines somehow so I nuked the profile and started again from scratch. This solved it so I spent 2 days doing the same to all our other machines. A few days later we were all suffering the same problem all over again. Wondering if it was caused by my mail provider which was AWS I migrated the whole companies mails to Rackspace. This meant recreating all the accounts again and for a few days once again everything seemed fine but then the problem was back across the board. Outlook does not seem to suffer this issue but it lacks many features we use extensively and a number of addons we rely on too.

Please take a look at the attached images; as they say, they tell 1,000 words.... (These are refusing to upload, I shall post and then try to edit this post to add them or post them below, hopefully.)

Any thoughts, suggestions for diagnosing, etc gratefully received!

All the very best, -Tom

I shutdown Thunderbird and restarted and it now prompts me to create a new account and all my email boxes are missing. The files are still in C:\Users\masud\AppData\Roaming\Thunderbird\Profiles\xxxxxxxx.default and I have tried creating a new profile and transferring over some of the main files to the new profile, but this gives the same problem. I have uninstalled and reinstalled TB and still no luck. My Address book is accessible though.

Win8.1 using Tbird 24.5.0. Download of emails became intermittent in mid-May. As of 6/4, none can be downloaded. No problem sending emails. I have a POP3 account with Earthlink. I started Tbird in safe mode via Help > Restart with ad-ons disabled.

The status bar at the bottom stated that I was connected to pop.earthlink.net. Then it stated that is was 'Downloading message 1 of 116'. After a while with no messages coming in, it stated 'No messages to download'. It never said downloading message 2, so I don't think the messages went somewhere unknown.

This is the situation with my Windows firewall disabled and with my G Data antivirus disabled. I've tried various other things after reading that others are having a similar problem. Earthlink support verifies that I have the right setup. I uninstalled Tbird and reinstalled. I removed the account and added a new one -- and lost my saved emails until I went to my backup. Someone mentioned a ad blocker. I have one on Chrome from Adblock Plus; I don't see how that would affect Thunderbird.

What now? Thanks, Bruce

Since about 3 days the connexion is refused with the message saying that either the mail address or the password is incorrect. I can connect via Firefox to the web Outlook.com with the "incorrect" mail address and the password.

Looking at Outlook support there is an article for users of the mail clients Outlook 2016 and Outlook 2013 wtih this same problem and the article states that the new version of Outlook requires that the user recreate their profile and re-add the account.

Hi. When replying to an e-mail, Thunderbird has started to place to input cursor in the TO field instead of the message text field (in this case it should be before the answered text).

Any ideas? BR Johnny

v115.10.1 I made a mistake setting SMTP credentials, wrong protocol, and it just stays on Sending dialog. So I abort when I realize I made a mistake and come back to mail I was to send. - but 30-60s after I aborted comes an error message saying it timed out

So the cancel button does not really cancel the send attempt, it seems.

Not sure where to report bugs, so do it here. Thanks.

Please find attached screenshot. I have added 10 email accounts for 5 domains. Most of them are unified since I used the "unified [folders]" option. Unfortunately, Thunderbird ignores several email accounts. This seems like a bug to me.

I have Thunderbird 125.0 (64-bit) on Win 11.

Everything works perfectly, BUT..

If I select File->Exit then it just goes into not responding mode and I have to end task to restart TB.

If I just click X then the window closes but If I click my thunderbird icon to bring it back up, nothing happens.

I often have multiple TB processes which I have to kill.

On system restart, everything is fine unless I try to exit TB.

In case it matters, I have private ISP email acc, and 1 hotmail and 1 gmail acc.

Any thoughts appreciated.

Thanks Steve

v115.10.1 32-bit Changed isp and email completely, and wanted to change both server name and user name. But editing server name and leaving that field I get a popup wanting to restart - problem is I need to change user name as well or no go

So it starts to try and login but fails of course, since user name need to change too.

This really need another approach, maybe not so automatic.

Changing focus from first field to next one should not execute restart. - just when leaving second field if any of first and second is changed

So going through all accounts and failed logins etc all the way is cumbersome. - dual restarts every account

Not sure where to put bug reports like this. Thanks.

During the day, every day, thunderbird stalls. A spinning circle is displayed and new messages cannot be read. The only way I have found to be able to read the new messages is to close thunderbird and restart it. Unfortunately, this is not a permanent fix and a variable number of minutes/hours later I have to do this again.