Thunderbird Support Forum

I 've used Thunderbird for several years without any issues - thank you for that - but suddenly, over the last two or three weeks when sending a message, I have been getting an authentication error message from my ISP and the e-mail is rejected. This occurs every time I try to send an e-mail after rebooting my PC.

A password change made no difference.

Incoming messages are not affected.

Clearly my ISP is blocking the messages because it is not receiving the correct password or account name - but why?

The workaround I have discovered is to enter troubleshoot mode, then send the e-mail (successfully). Then I can exit troubleshoot mode and any later e-mails are also sent successfully - until I reboot the PC and then I have to repeat the procedure again.

I am using v91.7.0 (32 bit) on a 64 bit PC and running two e-mail addresses, both of which exhibit the same behaviour.

I do not have any add-ons and I use default preferences.

Any help would be appreciated.

v91.7.0 on OS X 10.14.6 Used TB for many many years. Have a Charter IMAP email account set up. All of a sudden a good number of months ago, all my emails in my Inbox have a banner that says "This is a draft message" when just clicking on them in the email list.

> https://i.imgur.com/joLqACp.png

Opening any of those mail (which for some reason always opens as Write: mode, whatever that is, not view or reply; not sure what's going on there either) will show a yellow banner at the bottom of the email with the following: "A unique identity matching the From address was not found. The message will be sent using the current From field and settings from identity <IDENTITY> <MY EMAIL>."

> https://i.imgur.com/svBSvqi.png

Any other folders, like Sent or Saved folders don't show or have this issue. I am not and don't use Unified View. I also have two GMail accounts and neither of them are doing that with their Inboxes.

EDIT: It displays some similarities as the bug here, but not all of them (https://bugzilla.mozilla.org/show_bug.cgi?id=1508153). For example I don't get a double window.

hi, I follow some suggestions as

https://support.mozilla.org/en-US/questions/1309622

and I try to delete mimeTypes.rdf and handlers.json but Thunrderbid continues to use chromium to open https links.

Can you help me?

I am running TB 91.7 in Win 10, with Bitdefender AV and firewall. When attempting to send an email, I received a popup indicating an issue with the SMTP outgoing server. (original message attached) (also original in and outgoing server settings attached). Upon checking the ISP's recommended settings, I discovered some updates (settings attached) and made those to TB (settings attached); I had to do some interpretation here, hopefully correctly. Attempted resend of message, still error messages (two popups attached). The webmail version works fine. Thanks.

This issue shows up randomly, affecting a random number of messages. Issue is that one message will take over other messages following. Message notification will look normal in the inbox, but click on the message following X message, and the X message is what will appear. The subject line at the very top of the page will be from Y, but the rest of the information following will be from X. Two, three or more messages may be affected. Deleting X will make no difference. This time, four messages were affected.

I have Thunderbird set up with several different email accounts. In December 2021, one of the email accounts suddenly stopped working. It won't receive or send emails. I didn't change anything.

I'm not knowledgeable about figuring this stuff out, so I'd be very grateful for some help. The email that's not working is a gmail account. At first I was getting an error message about the password not working. I'm positive I'm using the correct password, because I tried it on https://mail.google.com/ and it worked fine.

I have Windows 10. I updated Thunderbird to 91.8.0 (32-bit) and it didn't make any difference -- I still can't receive or send email from the problem account. I didn't change any server settings (they are the same as my other gmail accounts, except for the specific account names).

When I try to get messages, it says says Connected to pop.gmail.com...

then

connection to pop.gmail.com server timed out

I have no idea what this means or what to do. If you need more information about my settings, just let me know what you need and I'll get it.

Thanks for any help you can offer. At this point I'm desperate.

1. Some of my emails display BLANK content when opened; since Thunderbird updated with 91.8.0 to my Windows 11 64bit. The header displays correctly but the view screen is blank. I've tried troubleshooting in safemode and disabled any add ons, reset all the display controls and restarted with no success to resolve the problem. I've tried different view modes, Original, Simple HTML and Plain text and still get nothing showing. I've tried to copy the blank screen to clipboard to try different color modes with no luck. Not a problem of White on White text. The message is in there when I check the Message Source, but it does not display in the view. However the original mail does display correctly on my browser when viewed on my ATT email account which forwards to Thunderbird on my computer.

ODD Solution: i just noticed that when I move the email with the BLANK content to TRASH, then that content does display correctly! Then I can move that email back to my INBOX and it displays there correctly. Isn't that crazy? Ha,ha, the quirks of computers are like quarks in quantum mechanics with random results.

2. Some of my email content is displayed under the WRONG HEADER. The email content displayed under the wrong header is usually the content from the prior message. For example I get an email from CVS ok. Then my next Email is from Citibank, but that email displays the content from the prior CVS email. No solution to that as of yet. Are these BUGS in the new release 91.8.0?

TB has been working for years with 2 gmail IMAP accounts and Google calendar. TB has just updated to 91.8 and the gmails and calendar stopped working. I deleted the stored passwords, started TB in troubleshooter mode and re-entered the google passwords.

Google calendar is now working but the 2 gmail accounts still don't work.

I deleted one of the accounts from TB and re created from scratch. Account creation fails with

 Unable to log in at server. Probably wrong configuration username or password.

The other gmail account which I haven't deleted comes up with an authorisation error after entering the google password and allowing access.

I have checked that TB cookies are allowed and javascript is enabled.

I have run out of things to try.

What I don't understand is the calendar is working but gmail isn't even though they use the same Google account and password (and Oauth2).

I am using the latest Thunderbird 91.8.0.8126 and latest Firefox 99.0.1.8136. I am having the same issue as reported in these posts:

https://support.mozilla.org/en-US/questions/1343530 https://support.mozilla.org/en-US/questions/1344530 https://support.mozilla.org/en-US/questions/1350244.

I have 5 Gmail accounts that I manage for different family members. All accounts in Thunderbird access Gmail via IMAP, and are configured to login with OAuth2.

This week, Google removed Thunderbird access from 2 of the accounts, I do not know why. When I login to the accounts via the web in Firefox, Thunderbird was no longer listed under their 3rd party access. The other 3 accounts are fine.

1 of the accounts does not have 2FA enabled. I was able to re-login with Thunderbird when prompted, and I was presented with a window to grant Thunderbird access, which worked, no problem. So Thunderbird's browser was clearly recognized.

But the other account does have 2FA enabled, and that is where the problem lies. Thunderbird prompts for login, and the username and password are accepted, but when I enter the 2FA verification code, Thunderbird presents a window saying "Your browser is not supported anymore. Please update to a more recent one." (https://bugzilla.mozilla.org/show_bug.cgi?id=1677845). There is no option presented to grant access to Thunderbird. Yet, the verification did work, because my primary email receives notification that the account was logged in from a new device.

For the record, the failing 2FA account is managed by Family Link (the other non-2FA account is not). According to https://support.google.com/mail/thread/127545584/, such accounts cannot login to email clients. But that has never been a problem before, and 1 of the other still-working accounts in Thunderbird is also managed by Family Link and works just fine, so that can't be the culprit.

Also, I do have AVG installed with Email Shield enabled, but disabling that makes no difference.

Thunderbird's UserAgent is "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:91.0) Gecko/20100101 Thunderbird/91.8.0". And yes, cookies are enabled in both Thunderbird and Firefox.

Is there a way to get Thunderbird to use Firefox properly for Gmail login, instead of its own integrated browser?

Hello, I have a GMail account, from which I download my email in Thunderbird (in Linux), and keep it ordered locally.

I noticed that my backups are very slow, because Thunderbird keeps two big directories that get updated often:

11G /username/.thunderbird/k0aa999s.default/ImapMail 7.0G /username/.thunderbird/k0aa999s.default/Mail

under /username/.thunderbird/k0aa999s.default/Mail I see I have my local folder structure and that's good, but what is under ImapMail ? I guess it is the corresponding email structure I have on the gmail server, (although gmail reports that I'm using 5.67GB, not 11GB). The 11GB are created by just 4 files: 1.6G Apr 22 09:55 Sent Mail 3.0G Apr 22 14:16 Trash 2.6G Apr 22 14:16 Important 4.3G Apr 22 14:20 All Mail

I saw it suggested to rebuild the folders in Thunderbird - I did it but nothing changed

What can I do? I dont need / want to replicate Gmail structure locally, I just want (and use) only what I have under /username/.thunderbird/k0aa999s.default/Mail

Dear community,

in the past, I have noticed that a few e-mails - but not all - are displayed incorrectly as plain text instead of the usual HTML-text. This means that there is no formatting involved, e.g. the font art is not correct. As it seems, the issue occurs when the standard formatting options of e-mails are used by the senders. So if nothing is changed like the font size or colour. If I look at the e-mail on different e-mail programs, everything is alright. I have already ensured that the option View > Message Body As > Original HTML is enabled.

Thanks in advance for your advice. batengo

I have two email accounts. On the first one I cannot send or receive emails. I get message "login in to server imap.telstra.com with username *******@bigpond.net.au failed."

On the second I am receiving and sending emails but it is not saving my sent emails.

Any suggestions?

Every day I notice this message pop up on the status line of TB. It's always the exact same message, compacting saved 1.5GB. Now, I'm pretty sure that I don't actually get 1.5GB of space savings every day, so why does this keep popping up?

My TB is running the current version.

Good day, I am using Thunderbird with my Office 365 e-mail account. I like pretty much the appearance of Thunderbird, as it is not so crowded as Outlook. Unfortunately very frequently it is "Not responding" and the screen freeze for few seconds. Should wait untill returns to normal condition itself, to continue my job. I did not found any topics into help about that problem and any solutions. With Outlook I do not have the problem described above, but prefer to use Thunderbird. Kindly ask you for any advices, if available. Many thanks in advance!

My Thunderbird set-up has worked fine for years so I was surprised to discover two days ago I can no longer send emails. I have a Gmail SMTP account which I have never previously have a problem with.

Thunderbird updates automatically and I am on version 91.8.1 - it's possible the problem began when the new version was downloaded but I don't know when that was.

Whenever I try to send an email I get the error:

The message could not be sent because the connection to Outgoing server (SMTP) smtp.googlemail.com timed out.

When switching on Thunderbird 91.8.1 (64bit) today, it immediately downloaded mail from my IMAP account followed by the message "Server not found - start.thunderbird.net could not be found. Please check the name and try again. Check typing errors / network connection / firewall / proxy etc." Selecting 'Try again' simply opened the 'Welcome' overlay leaving the client operating as before.

This is a first as far as I can remember. But in the midst of the other more problematical events that have been occurring, (see my previous question, recently updated discussing possible Settings errors retained in the Profile): 'Exporting folders with ImportExportTools NG' https://support.mozilla.org/en-US/questions/1373167

Can anyone suggest if there is any link between these events - and confirm a solution that would clean or replace the profile but leave (or restore) the messages and folders unchanged ?

I have setup my business office mail address with the owl extension. When I try to send an e-mail a error message pops up that Thunderbird couldn't put a copy into the sent folder. So I wanted to place the copy only in the local sent folder, but the settings is grayed out and I can't change anything.

When I look at my personal microsoft mail with @outlook.de I can change everything and the setting is picked correctly out of the box

I'm setting up a new PC, and am using the same settings that have been on the old PC for three years and are in the Yahoo configuration guide: Pop3 inbound. att.net/outbound. att.net 995/465 SSL/TLS Normal Password

I've been at this for hours, and Tbird just won't connect. The error is "Unable to log in at server. Probably wrong configuration, username or password". I am stumped.

Hi,

I have a strange problem with Thunderbird (currently 91.8.1 on Linux, but have this problem for a while). Initially (i.e. after each reboot) Thunderbird works normally but at some point when I start Thunderbird all I can see in the folders list are one entry for each account (see attached screenshot). I can still edit account details. But the only way to make it work again is to reboot my system. Just logging out and in is not sufficient. I tried to start Thunderbird in safe mote or to get some log details but nothing helped or got me a step further.

Today I experienced something new. I worked with Thunderbird and didn't close it (and also didn't suspend or hibernate the system). At some point when I wanted to visit the sent-item-folder I got an error message (unfortunately I didn't make a screenshot) that the folder couldn't be loaded. Then I couldn't open any folder. After restarting Thunderbird I had the problem of above.

Hope someone has an idea how to fix this.

Alex

Just this week I started having problems where Thunderbird hangs, apparently due to a memory leak, after viewing S/MIME signed emails containng embedded hyperlinks to a secure site that requires my certificate to login. This is on a Dell Precision 7550 running Windows 10, and Thunderbird 91.9.0 (also the previous installed version - I believe it was 91.8.1).

After clicking on such an email (which come from a known address and are forwarded to a specific folder by a rule), the email is slow or fails to load into the display window. Subsequent clicking on other folders has a delayed response or never responds. I sometimes get a message at the top saying (Not Responding), sometimes I can click on other email records or switch folders, but emails no longer display contents in the viewing pane - it stays blank.

The other think I noticed is the blue bar at the lower right which appears when compacting shows up with the bar at 100% but never goes away. To end the task I must use Task Manager. This behavior only occurs after I have clicked on signed email with links (but not the link itself) that require a login using the smartcard certificates. Prior to looking at the signed email with these links, TB operates normally (aside from the endemic new user interface issues) when viewing other signed or unsigned emails. Curiously, in my most recent restart of the program, I clicked on several messages from the source of the emails with the hyperlinks, but ones that did not link to the secure files requiring certificate access. One of these was encrypted and opened normally with my certificate, and after accessing this email, the emails with the secure hyperlink opened normally and did not result in TB not responding.

I believe this has something to do with TB and S/MIME configuration, and have verified this behavior does not occur in Troubleshooting mode. However, in Troubleshooting mode, I cannot access my PKI S/MIME certificates as the Broadcom smart card device is not present. I am attaching a task manager snip showing the memory leak (the memory used continues to increase with time, the CPU percentage stays roughly the same - unfortunately this file upload has a perpetually spinning circle and still says it is uploading, so I may have to try again). I have also included the Device Manager view associated with the S/MIME certificates in regular and troubleshooting mode which show the internal Broadcom device is not present in the latter instance. I need to have the functionality and security provided by the smartcard S/MIME certificates, so this is a major problem for me.