Thunderbird Community Forum

I get a message saying "The certificate is invalid." And I am currently unable to receive emails. When I open the server settings screen, it says "The certificate exception already exists."

I have been using Thunderbird for years. Suddenly, a couple of days ago, the sent and trash folders no longer show the emails in them. When I use Roundcube online, these files show up there as normal.

I have done considerable research online to solve this problem to no avail. Using AI, they suggest a number of things that I have tried, without solving the problem. Apparently, this is somewhat common. I finally got to deleting the send.msf and trash .msf. This did nothing to solve the problem.

This is very frustrating. What can I try next? I am using Win 11 and Version 152.

Carl

Hi

I have a problem with Thunderbird which might be a bit niche but here goes...

The first attempt at sending an email fails as TLS Record Layer v1 is used, the mail server sees this and hard resets the connection so sending halts. See attached Wireshark trace screenshot "Failed".

If I retry the send again Thunderbird uses TLS Record Layer v1.3 and the email goes out ok. See attached Wireshark trace screenshot "Success".

If I send another message immediately no problem but if I wait 20-30 minutes the above cycle happens again.

I have set the minimum TLS version in the config to 1.3 (option 4) and restarted Thunderbird but this has not changed anything.

Any ideas how I can fix this? It's a pain because automated replies don't work.

I have a fresh install of Thunderbird from yesterday. Never was on this machine before. Setting up 2 mail accounts worked well. I can select multiple messages using either ctrl+click to select individual messages or shift+click to select a range of messages. They all get highlighted as one would expect, but when I drag them to another folder, or choose from the right-click options like move or copy or archive, this action is performed only for the first message that I clicked. I am sure this did work before and I have no idea what I might have changed so that it does not work anymore. I transfered a lot of messages from one account to the other without problems. I changed archive options, installed the AutoArchive addon, changed folder icon colours, ... Can't remeber everything, sorry. On a side-note, AutoArchive is also only archiving one single message from every folder, so the underlying mechanism is the same.

A few weeks ago my installation of Thunderbird on my Windows 10 laptop was version 151. I want to stop it from being updated, and I asked AI for help. It suggested the following:

1. Create a directory named "distribution" and locate it as follows: C:\Program Files\Mozilla Thunderbird\distribution. 2. Within that directory, I was asked to create a file named "policies.json" and I did so. 3. Within that file, I was asked to place the following: {

 "policies": { 
     "DisableAppUpdate": true 
  } 

} and that's what I did.

When I had a look under Settings > Update, there was a note to say that updates have been prevented by the administrator. (That would have been the effect of what I just did.) That was a few weeks ago.

So, when I looked at my version number today, I saw that my version is now 152. It had updated, and the directory and file I created are now no longer present.

It seems that the update process deletes anything that shouldn't be there and doesn't trouble itself with the file I created.

How do I stop Thunderbird from updating my installation?

Dear Support,

we can not log-in with our office 365 account. We need to log-in with "Exchange Add-on erforderlich", but we receive this error message.

I attached you some screenshots. We do not understand why this error appears.

When we log-in with option "Exchange" then it works but we need the other option because we need to have the sub-folders.

Please help us.

Best regards, Andreas

I tried to connect my user on my Online Accounts on Linux Mint, but it said: Authentication Failed, so i tried to open my accounts and send a message to myself. The message is sent and it appears a little window that says: Your Messages was sent but a copy was not placed in your sent folder (Sent) due to network or file access errors. You can try or save the messages locally to Local Folders/Sent-(my e-mail name).

Same happens with Troubleshoot Mode and I don't think it's a connection error, so what is the file access error in here?

The system was working fine. The next day, when starting Thunderbird (TB, the status line shows logging in to server but loops; no errors or messages, Thunderbird is 'locked out' spinning. I see the normal INBOX page, but logging in never completes. NO CHANGES were made to TB accounts or settings. I have re-installed TB, re-booted, but no change. I cannot check/change any of the accounts or do any further 'debugging' because TB is spinning. The server login is fine because Webmail can be used. Internet connection is fine, because browser works. 1. How can I stop TB from trying to login at start up? 2. What could/would cause this behaviour?

Any suggestions much appreciated.

I have 'Allow remote content in messages' turned off.

When viewing a message with remote content, I see the bar "To protect your privacy, Thunderbird has blocked remote content in this message", however the 'Preferences' dropdown described in Remote Content in Messages does not exist...

I want to show remote content for a single message, but this seems impossible!

What am I doing wrong?

Other than being slow to download my emails now for a few months, TB was performing well until a week or so ago. Now it also won't open the downloaded email when I click on it and the TB freezes up so I can't close it out. I have tried restarting computer multiple times and it works for one or two emails that I can open and then starts freezing up again. Makes using it almost impossible. I have security Windows 11 Defender only and have had it the entire time when it also worked well.

I remember a time, where it was possible to simply drag a contact to a new mail to send it to friends. Shortly I wanted to send my wife a contact she lost, but it was no more possible, to attach it to a mail. Even an export of this single contact is not possible. Why?

I don't like to export the whole contact folder for her, because there are many contacts she will never use. So it should be possible to export 1 single contact as .vcf alone.

I would be happy, if the developers would rebuild this functionality for a future update. Thanks.

Hi All,

ok, so just clicked retrieve messages and as they came in we had a power cut.

Rebooted the PC and all messages are there, but 2 copies ... I deleted one copy, but I can't delete the other ..... and they're all empty.

All the highlighted messages in the image will not delete. Any new ones that come in are fine, but these simply won't go away.

Any ideas?

cheers, Ross

WHY DO I GET THIS MESSAGE WHEN ATTEMPTING TO SEND EMAILS, EVEN THOSE WHERE I AM SIMPLYREPLYING: Sending of the message failed. An error occurred while sending mail. The mail server responded: <andrea@simplygardenmaintenance.com> recipient rejected - relay denied. Please check the message recipient "andrea@simplygardenmaintenance.com" and try again.