Thunderbird Community Forum

This evening, Thunderbird has updated to the new version (can't see where the version number is held, unfortunately). Whenever I try to download new emails, I now get the message "Error with account [email address]. Sending of username did not succeed. Mail server pop3.iomartcloud.com responded: Mate, the command must be one of CAPA, USER, PASS or QUIT." Mails are still accessible through the mail client on my phone and through webmail, just not through Thunderbird.

System specs below. Thunderbird is set with 1 account: A paid Yahoo email, with a LOT of messages (well over 36K), using IMAP (Yahoo only lets the most recent 10K come down via IMAP, sadly). Most emails do download and are correctly rendered. But around 10%, starting usually a month or so back from the high water mark of last update, show email source code (text of headers, mimeparts, etc.) for a totally different email than the one highlighted (a few days later, different sender, etc.) Checking the message on Yahoo, it renders correctly. There is no pattern to the corrupted messages: they can be from mailing lists, company marketing mails, an alert from my local town, whatever.

Once the error occurs, it is consistent across Thunderbird shut-and-restarts (still showing same wrong email source as before). Emails to either side (earlier and later) render properly in the message pane.

Double Clicking the message to it's own child pane renders a pane with Subject and From as blank, and the same email source text for a different email. Forwarding the email puts the email source code in as text (I was hoping the act of refreshing and reformatting might grab the correct content, but no).

Doing a Repair Mailbox (which seems to mean "download headers again, then download all the mail again" does seem to correct for a time (including the previously corrupted emails now rendering correctly)... but within a day or two, a new crop of messages will be corrupted, and the dance starts again.

Windows 10, 64 bit. Norton 360 set to exclude all mailbox directories. Thunderbird 115.12.2 (64-bit), though this has been happening since 110. No plugins, no extensions.

Are there diagnostic logs or other info I can share that can help us figure this out? I really like Thunderbird, but it's just unusable here. Outlook, Apple mail, other tools don't seem to have this problem.

Dear Sir or Madam,

I have just migrated Thunderbird to my new CUBI desktop running Windows 11. I get security errors when I launch Thunderbird. My email provider The Messaging Company advised me to change server settings, which are now shown in the Troubleshooting Information page as account1 (pop3) pop.themessagingco.com.au:995 SSL/TLS Normal password smtp.themessagingco.com.au:587 STARTTLS Normal password true.

On launching Thunderbird I get the message Secure connection failed live.mozillamessaging.com uses an invalid security certificate. The certificate is not trusted because the issuer certificate has expired. Error code: <a id="errorCode" title="SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE">SEC_ERROR_EXPIRED_ISSUER_CERTIFICATE</a>

   This could be a problem with the server's configuration, or it could be someone trying to impersonate the server.
   If you have connected to this server successfully in the past, the error may be temporary, and you can try again later.

Or you can add an exception…

AND when I attempt to send an email I get warning that the SMTP server does not have a valid certificate. If I ask, in either case, to "Get Certificate" the response is that the site attempts to identify itself with invalid information.

I have "tried again later" over two weeks, and nothing has changed.

The Messaging Company is a fairly large email provider: it seems strange that its security is incomplete. However, I am not happy to just set an exception and over-ride these errors without doing all I can to check that there is not something screwy going on. I really value using Thunderbird, and The Messaging Company's advice that I should just use webmail is not at all satisfactory: I keep everything on my computer or backed up to a portable drive here.

Please: is there anything I can do or should know to fix this problem?

Best Regards, Margaret Mackisack

After downloading TB128.0.1esr (32-bit) the following error appears continously"

Authentication failure while connecting to server pop3.live.com

This was not an issue before this download!

At about the time of the most recent update to Thunderbird my wife's computer started running Thunderbird all wrong. A large chunk of old messages vanished, but not the oldest, and when she deletes a message it vanishes instead of going into a Deleted file. The old messages are still on the server, but Thunderbird will not download them again, I assume because it thinks she already has them. They are there, though. I installed her email on my version of Thunderbird and it promptly downloaded all 330 of them. I assumed something went wrong in the update so I thought if I uninstalled Thunderbird and reinstalled it, all would go back to normal. I have done so with both a warm and a cold reboot after uninstalling and in both cases when I open Thunderbird, there is her account, faults and all. So the question is "How do I get rid of Thunderbird completely, so that it needs the mail-box reloaded as well?" It is beyond me why what I have done doesn't work. Is there some other way to get the program working like it used to? My wife is about as technophobic as they come and takes a long time to learn something new so please can we go back to the way we were? We are both in our 80s so new tech is sometimes a challenge. Any help you can give us, in simple language please, would be appreciated. I don't want to convert her to Access as I have never used it and wouldn't know how to teach her. Thank you, Peter

'Have enabled and disabled. restarted, both times. Tried troubleshooting mode, and cleared the cache. Could not find the setting in the config screen. Not sure I was looking for the right thing, anyway. Your help will be greatly appreciated. John Looze

Once again, since my husband suddenly passed 13 December 2024, I cannot send or receive email via my intoknow.com account.

Previously, it was somehow "repaired." Please, i need this account to stay active.

Susan Hungerford [edited] @intoknow.com (Currently not working, however) [edited phone# and email from public community forum]

In Thunderbird I have an *@live.co.uk account" However when I open TB this account does not refresh. I went to "Saved Passwords" and it asks me for a PIN. The dialog box is headed "Mozilla Thunderbird"; "verify your identity to reveal the saved passwords" This is new to me as I had just opened "Saved Passwords" but on a reboot I get this message. I guess this is a new feature.

I did not know I had a PIN for TB.

I tried "I forgot my PIN". That says "You can reset your PIN by going to Settings > Accounts > Sign-in options" I can't find that option General, Composition or Privacy and Security

can anyone please advise?

Kia Ora Koutou from Aotearoa New Zealand.

After several hours of sheer frustration, including reading a significant number of posts I am still without result.

Thunderbird keeps asking for my my password for both my SMTP and IMAP settings despite all of these being correct.

I have checked with my domain and email provider (mail.1stdomains.co.nz) and they inform me that it appears to be a thunderbird settings.

Checking the thunderbird settings they are correct including passwords, however, the mail client just refuses to download the mail providing a dialogue box with "login to account "<PRIVACY>" failed. Enter new password, Cancel, Retry.

Is there some way to fix this error?

I have used Thunderbird for years with automatic update. Got a Big yellow warning - something like: this is a test version, the profile must not work in esr version. I immediately stopped. Downloaded the esr version and started it. Thunderbird could now not read my profile an initiated install procedure. I saved the profile. Can I see in the profile which version of Thunderbird it can be used under ? You aught to give i clear warning in test versions when you change an user profile.

Yesterday and today, the same emails kept downloading every time I asked for new messages. As some have suggested, I deleted the global-messages-db.sqlite file and restarted Thunderbird. Only messages before 3-27-2023 appeared. If I fetched messages from the server, it brought in only a few of yesterday's messages. After rebooting, it would download today's messages, but all those before 8/2/24 and 3-27-23 are missing. How can I recover them?

Windows 10, Thinkpad, Thunderbird 128.0.1esr (32-bit)

James Cooper

1. Looking for settings to show/unshow folder counts in the folder list. My TB shows the counts. The example on TB web page does not show counts. 2. I am unable to get Unified Folders to "stick". I click it in View > Folders but it then unselects. Help appreciated, Chris Sackett Using new Nebula, which looks great!

First off you should warn that this version changes your profile, so there is no going back. I installed it and have lost ALL of my accounts and had to start from scratch. It took me back to the beginning. I hate the interface, too cluttered, to busy and generally sucks. I am thinking of dumping thunderbird at many, many years of using it.

This is a very strange issue. Some of the messages in my inbox, when selected do not display the message itself. Blank box. I looked at the message source and there is nothing displayed but white space in the box. The messages that are not displaying are before 3 August 24 and back in time to the year 2018. Those messages received in 2018 appear correctly.

Messages received after midnight (12:01 AM) 3 August display fine. Message source view displays the contents.

On that computer, I have other email accounts that display the messages correctly. Nothing missing. So whatever happened, only one email address account was affected. It is like something deleted that data.

Running Windows 10 Pro and latest version of Thunderbird. No extensions

Anyone that can inform me as to what might have caused this and tell me if it can be fixed, I would be greatly appreciative.

Thank you

After updating to Thunderbird version 115.12.2(32 bit) two days ago, I can no longer send emails. I get an error message "Authentification error (VM401)" I use Virgin Media. I can receive emails OK. I have not changed any server settings for a long time. I have been in touch with Virgin Media, they say the problem is with Thunderbird as I can send emails from on their one line system. I can also send emails from my Android phone. Any help would be appreciated.

I've setup Thunderbird as my new email client but I'm getting the following error message on both mailboxes. Went through manual confi and it said all was good. Can't figure out what I'm doing wrong. Any help greatly appreciated tks - patrick replies to: prpa1440@gmail.com

Hello,

I am running Thunderbird 115.13.0 and cannot get e-mail from my bellsouth.net account on my MacBook Pro #6 computer. I get the error messages below. I have another MacBook Pro #5 running Thunderbird 102.15.1 that is receiving e-mails just fine. As far as I can see the server settings on the two computers are the same. Any advice about how to proceed? Thanks for any ideas.

Al