Thunderbird Support Forum

I am using v. 91.9.1 of Thunderbird e-mail

I have been running 4 e-mail addresses, all with BT.

This last week 2 of those addresses have stopped sending outward messages although I haven't changed anything in Thunderbird or BT.

The other 2 addresses work for both in & outgoing mail.

On the failed outgoing mail I get the following message:- "Sending of the message failed. Unable to authenticate to Outgoing server (SMTP) mail.btinternet.com. Please check the password and verify the 'Authentication method' in 'Account Settings | Outgoing server (SMTP)'." BT says they can't help. The problem is with Thunderbird??

Any ideas ? Regards David Bates

I'm a long time user of Linux Mint. Now on 20.3 and Cinnamon desktop. Also a long time user of Thunderbird. Now in version 91.8.1 Always used the "allow insecure apps" in my gmail account settings and used normal password stored in Thunderbird. Google urges to change the authentication method to oAuth2. Tried everything to no avail. Always "authentication fails when connecting to imap.gmail.com" Cleared all cookies, allowed them, deleted all saved passwords, followed all published advise I could find, and nothing. Then I made a brand new profile pointing to an empty dir and entered my gmail address and checked everything. Same result. In despair I installed Evolution and all run fine at the first try. Should I really give up on Thunderbird? Thanks in advance for any help!

Google's depreciating "Normal password" authentication method and I am forced to switch to OAuth2. In Account settings I switch authentication method to OAuth2. Popup window appears asking me to fill my email, which is correctly filled, I click Next and I get the error message from the screenshot. Thing is if I start a fresh profile, I can add gmail account with OAuth2 just fine. I have cookies on and normal password removed from password manager for the account. Any idea if setting something in my profile can solve this?

with version 91.9.1 (32 bit) it takes 12 to 14 seconds to send an email - same on 4 computers 3 windows 10 and 1 windows 11 this started 5/22/2022 after Thunderbird update

I have a lot of issues with my mailbox. Constantly have to repair folders because the wrong subject shows on the wrong email. A big one I had was my inbox getting bogged down, but I learned it doesn't like to have more than a couple thousand emails in it. I kept getting a "exceeded maximum number of connections" error but read something about too many folders, got rid of a few folders and that error went away.

1) What other kinds of tips are there for keeping TB behaving well? 2) I see that my profile has a lot of old files for old folders that don't exist anymore. There's also nstmp files and foldercache.json files. Should I delete all these types of things to clean up? Or should I just start fresh with a new profile and re-download all my email messages? I can't imagine how long that will take because sometimes folders download quickly but other times take forever and I'm not sure the difference. I just downloaded a 4000 email folder in a 20th the time of another 2000 email folder.

Hi, I have an existing installation of Thunderbird 91.9.1 on my linux system. I have a gmail, outlook and web.de mail each running via this installation (IMAP). My new workmail is hosted by 1&1(ionos). I can log in via web interface. Autoconfig finds the configuration that is (according to their help articles) the correct one to access the Mail via IMAP. Incoming: imap.1und1.de SSL/TLS 993 Outgoing: smtp.1und1.de STARTTLS 587 normal Password Username is my full email address. There have been no typos. I checked 5x, copy pasted, rechecked. Pasted it into the web interface login, and thunderbird before clicking go on each -> tb - no, web - yes domain is talsen.team

I would appreciate some pointers to get this fixed. And yes i did read prior questions regarding this error. It did not help in my case.

Avast flashes the attached message [Avast has blocked access to https://incoming-telemetry.thunderbird.net/ because one of the issues of the server certificate has expired.] Avast suggests a work-around. Is this something you are planning to fix [updating a certificate perhaps] or should I implement the work-around suggested by Avast? THANK YOU SO MUCH!

I have lost my IMAP and SMTP connections between Thunderbird v91.9.0 on Windows 10 and two Gmail accounts. One is a standard @gmail.com account and the other is an @my_domain account on Google Workspace. The experience is (almost) the same on both.

Any help would be greatly appreciated.

When I try to read IMAP mail through Thunderbird, I'm presented with a pop-up (apparently from Google) to log into the gmail account with the email address pre-populated in the "Enter your email" field. Curiously, the email address for the Google Workspace account is broken into two parts with the user name left justified in the field, the @my_domain right justified and a gap between them. This is not true for the standard @gmail.com account, where the field is prepopulated with a left justified username@gmail.com. I click the "Next" button and an "Enter your password pop-up (apparently from Google) appears, into which I enter the password and click "Next".

Then I see a pop-up (apparently from Google) which says "Mozilla Thunderbird Email wants to access your Google Account", with "Allow" and "Cancel" buttons. I click "Allow" and often (but not always) see a small pop-up (apparently from Thunderbird) which says "Authentication failure while connecting to server imap.gmail.com".

The experience on the sending side through SMTP is similar. Upon clicking "Send" in Thunderbird, I'm presented with the same sequence of pop-ups (apparently from Google) to enter Google user name, password and permission to allow Thunderbird to access my email. Then there is a "sending message" pop-up (apparently from Thunderbird) which never completes.

Here are what I think are the relevant Thunderbird settings --

 Thunderbird settings for user@my_domain.com
   IMAP server: imap.gmail.com        
   IMAP port: 993        
   User name: user@my_domain.com        
   Connection security: SSL/TLS        
   Authentication method: OAuth2        
               
   SMTP server: smtp.gmail.com        
   SMTP port: 465
   Connection security: SSL/TLS        
   Authentication method: OAuth2        
   User name: user@my_domain.com        
           
 Thunderbird settings for user@gmail.com
   IMAP server: imap.gmail.com        
   IMAP port: 993        
   User name: user@gmail.com        
   Connection security: SSL/TLS        
   Authentication method: OAuth2        
               
   SMTP server: smtp.gmail.com        
   SMTP port: 465
   Connection security: SSL/TLS        
   Authentication method: OAuth2        
   User name: user@gmail.com        
               
 Thunderbird Preferences            
   Accept cookies from sites: Checked        
   Accept third-party cookies: Always        
   Exceptions: https:accounts.google.com -- Allow        

Here are what I think is the relevant Gmail setting --

  IMAP is enabled

I've tried everything, including setting it to filter an empty folder instead of my inbox. But it still defaults back to filtering the inbox every time it restarts. I'm trying to stop filtering to debug why my email keeps hanging. I have 800 filters so I don't want to uncheck 800 boxes. There should be an option to turn off filtering temporarily, or to uncheck all the boxes at once.

I have Thunderbird 91.8.1 (64-bit) installed on my macbook pro mid 2012. I am having issues with folder compacting. It takes a long time no matter how often I do it, and makes the whole computer unusable until it's finished.

I have 3 accounts, 2 pop accounts and 1 gmail account that I don't use. I have tried removing the gmail account, and get to the confirmation screen saying "removal successful" - I then close thunderbird, and reload - and the account is back again.

I did ask this question in August last year, and then got distracted with life -(sorry День сумо for your assistance at the time) Since then the problem is the same. I just ignore the compacting requests. One new change now is that Gmail is asking for a sign in everytime I open thunderbird. I go through the sign in, and then that works, but if I close TB, and reopen I am asked for log in details again. My authentication method is set to 0Auth2.

Thank you in advance for any help with this.

Kind regards Hugh

This problem has been raised many times. For each of them, the thread has been archived. I have a solution which I haven't seen described (none of the ones I have seen works for me): 1. Create a new profile according to the instruction under Starting the Profile Manager here: https://support.mozilla.org/en-US/kb/using-multiple-profiles. 2. Go to C:\Users\<username>\AppData\Roaming\Thunderbird\Profiles\ and locate the folder which contains the folders ImapMail and Mail. If there are more than one, select the one with the latest dates for those folders. 3. Copy ImapMail, Mail and all the single files in that same folder to the folder with new profile you just created. Start Thunderbird in the usual manner. It will identify the necessary settings automatically.

Also I think you should have managed to get rid of this rerererecurring problem by now.

In early February I got a new laptop and installed Thunderbird on it. However, the "Mark as junk" feature won't work on the new laptop. I place the mouse pointer on an email in the Inbox, right click, then move over and down to Mark, then move over and down to As Junk, and all that happens is the font on the email heading goes from BOLD to regular. The email doesn't move to the Junk Folder, nor are any of the future emails from that address automatically sent to the Junk Folder. Marked as Junk emails just sit there in my Inbox until I manually move them. With the huge number of spam reaching my Inbox these days, this involves a great deal of time and effort, as can be imagined.

I'm still using my old laptop to receive my emails (because of another problem I'm having with the installation of Thunderbird on the new laptop), and the "Mark as junk" works fine on it. You place the mouse pointer on the email header, right click, move over and down to "Mark," then over and down to "As Junk," and the email is sent to the Junk Folder, and future emails from that email address goes automatically into the Junk Folder.

I'm using the same email service for both the old laptop and the new one, so, I don't fully understand what the differences might be. between the two Thunderbird installations. Perhaps when I set up the email parameters with my email service in the new laptop I inadvertently set up some different parameter than what's I did in the old laptop? Idk....

Anyway, this using the new laptop for internet usage, but then needing to use the old laptop for emails is getting really bothersome - to the point I'm investigating how to go about changing to Outlook for my emails instead of Thunderbird. I'm so anti-Microsoft this is a big a sign of how desperate I'm getting.

Any help will be greatly appreciated.

(edited for typos)

Thunderbird has been frequently "not responding" in windows more and more frequently and for longer and longer period of times. I have 4 different email accounts with thousands of emails each. I also get frequent crashes. I'm on version 90.10.0 (32-bit). I'm going to have to find a new mail client if this keeps up. There is nothing I can find to do file maintenance other than Compact and it often says something else is blocking it.

Hello,

In January, after what I believe to be compacting issue, I lost years worth of emails in my Sent Folder. It just happened again, although I cannot seem to confirm that this is due to a compacting error this time.

After a lot of research and trying a great many solutions, nothing has worked. I cannot recover my lost emails.

I have tried the "repair folder" method.

I have tried the "delete the index (.msf file)" method.

The "Sent" file that accompanies the "Sent.msf" file is quite small; smaller than it should be.

I am worried these emails are gone forever, but I don't know the cause.

Any help is appreciated.

Thank you!

I have Thunderbird installed on two computers.

On one of the computers, emails being held in my inbox are being automatically removed after two weeks (this is not a desirable action, I am loosing important emails), but on the other computer that is configured exactly the same, emails remain in the inbox indefinitely (which is desired).

Both computers are POP and both configured to run the same email account and appear to have all of the same configurations and settings. I saw someone had posted the same problem a while ago and the reply indicated it may be that the ISP or email provider has their settings set to delete emails as per the two week window, but as I can assure you this is not the case, it is a configuration issue with one of the Thunderbird installations, otherwise both of my computers would be deleting the emails while that is not the case.

Thanks,

Jeff Rogerson

I have 3 accounts that are all IMAP accounts to smtp.office365.com. They have worked without issue for years.

Recently, immediately after hitting send, I get:

The message was sent successfully, but could not be copied to your Sent Folder. The message could not be sent because the connection to Outgoing server (SMTP) smtp.office365.com timed out. Try again? Would you like to return to the compose window.

It does not have a delay that would be long enough to have timed out. If I then wait on the message without responding at all, the message goes away as does the compose window.

I also increased the timeout but that did not address the issue.

What might I explore to further troubleshoot/correct?

Sometimes, I have seen these kinds of issues come up with updates of the software and then later resolve, but this one has been persistent and I would like to figure it out.

The emails have worked fine for years and all that are related to office365 from multiple companies and multiple email accounts are having this issue.

I am on the latest TB 32 bit version 91.4.1 running on Windows 10.

Thank you for your guidance.

Hi, I updated my version of Thunderbird by downloading the latest version and installing it as opposed to allowing Thunderbird to automatically update. The basic reason was my old version didn't support OAuth 2.0 which I needed to continue using my gmail account. After the update, I had 2 problems. First, my address book was empty but I have solved that from a backup Profiles folder I have. The second problem is when I start Thunderbird I get the following error message in the pane that would normally show the last email in my inbox:- "File not found

The file mailbox:///C|/Users/blogs/AppData/Roaming/Thunderbird/Profiles/ohv7zad7.default/Mail/Local Folders/Inbox cannot be found. Please check the location and try again."

The 8 digit default file is showing a different 8 digits to my actual Profiles folder. What do I need to do to prevent the error message appearing every time I start up Thunderbird, All my old emails are appearing as they should. Thanks PL

Hi Support,

"Sending of the message failed. An error occurred while sending mail. The mail server responded: Error sending message for delivery.. Please check the message and try again."

v91.9.1 (32-bit) I've been getting this msg for the last couple of weeks. It doesn't tell me what's wrong & I can't figure out what's wrong. I haven't changed anything, but I think there was a recent update of Thunderbird when I was opening it one day. I checked the options, nothing looks corrupted.

Any suggestions? The error msg is really not that helpful. I detest using Yahoo, so any help would be appreciated.

Gratefully, Eileen

Hello, Thunderbird gave me a popup window letting me know I need to download the latest version. I did that, my version is 91.10.0. But, Thunderbird has asked me three more times since the upgrade to install the same file. Is there a setting inside Tbird to have it automatically install updates?

Thank you.