I-Thunderbird Community Forum

Still having issues with Thunderbird on my Windows 11 laptop. I tried reinstalling the program but still locks up. Any suggestions or comments would be appreciated Thanks Dave

Thunderbird Send message Error Sending of the message failed An error occurred while sending mail. The mail server responded: Must issue a STARTTLS command first. For more info, go to https://support.google.com/a/answer/3221692 and review RFC 3207 specifications. ffacd0b85a97d-47aa0f2186bsm33992962f8f.36 -gsmtp. Please verify that your email address is correct in your account settings and try again.

Note: I could not find the suggested specifications as indicated in the error message!

I did not change anything, the sending error occurred suddenly , all my settings IMAP Mail Server Port 993 SSL/TLS OAuth2 and SMTP Port 465 are still set to default. I changed also the SMTP to an new shown default 587 but non of this settings resolved the problem

I'd like to be able to search for a single email address in TB's inbox. Often I just need to find one email from an email address. I don't need or want to do a "saved search" I just want to reread a specific email from a specific sender. I believe I'm using the classic layout. I've looked through settings, layout, but can't find a way to do that. When I looked through the help articles, etc, all that came up w/saved search. Before one of the latest updates, I could just type in the sender's name or email address, look through all of them, then restore the inbox to list all emails by date. I'd like to be able to restore that function, is there a way to do that?

I have a similar problem to others reporting a connection time-out. But the circumstances now seem different. It is getting worse. First thing today, I noticed that Thunderbird emails (current/up-to-date version) were taking several minutes to finish sending. After sending 3 successfully, but slowly, all further emails failed, as per image attached. My wife's computer, using the same email provider, etc, was working okay. I checked and compared the account setting, and they were slightly different (no idea why) so I altered mine to match the other PC. That didn't make any difference anyway. Then (a few hours later) my wife's PC started having the same problems as mine, as if it's a spreading disease. Could it be a virus? Thanks.

New W11 Pro pc, so new installation of Thunderbird. All profiles and folders moved over ok, but the Bin folder is an issue (main Gmail account IMAP). In my previous Tbird installation, I was able to right click the Bin folder, and be given the option of emptying said folder. Not now. The Spam folder does have the Empty option. Pics illustrate the folder list, what happens when I right click the Bin folder, and what happens when I right click the Spam folder, which does have the 'Empty Spam' option. I can highlight the messages in the Bin folder and delete them that way, but the right click option is shorter, easier... The only item I can find in the Thunderbird help pages tell me to delete the Trash and Trash msf folders in the profile - tried this twice, with no difference. It's a little frustrating... Any help would be welcomed, I guess I'm missing something really simple...

Hi,

I was wondering the reason for the change in version 154 about changing the minimize to tray behaiviour when pressing the minimize button to minimizing when pressing the close button. Is there a standard? Why not make it a 2 way option, for users that prefer the older function?

Thanks.

Each time I attempt to login w/ T-Bird, google mail gives me this message:

400. That’s an error.

The server cannot process the request because it is malformed. It should not be retried. That’s all we know.

Please see attached image of the problem.

I have tried looking on Google for ideas but have not found anything on this or how to fix. Hope someone can please help would be amazing!

Google -

400. That's an error

The server cannot process the request because it is malformed. It should be retied. That's all we know.

For a week or two I haven't been able to send any email from Thunderbird. I use smtp.gmail.com as my outgoing server, and have it configured using SSL/TLS on port 465 with Oauth2 authentication. I first saw this on an older TB version, but have now updated to Thunderbird 152.0.1 on MacOS Sequoia 15.7.7.

When I try to send email, a dialog pops up saying "Enter credentials" for my account, then "Verify it's you". When I click on Next it asks me to "Complete sign-in using your passkey". I believe at this point another window is supposed to pop up and I can use a fingerprint to enter the passkey, but that window never pops up. I have tried 3 different default browsers: Firefox (my usual one), Google Chrome, and Safari. All behave the same. Firefox might be suppressing Javascript, but the other two certainly aren't.

Is there some system security setting that might be preventing Thunderbird from opening a window in the default browser, or does Thunderbird maintain its own record of the browser? Any other suggestions on how to get the passkey challenge to appear?

I use Thunderbird as a POP server and keep some historic read emails in my inbox as well as archiving others to local folders. I am moving to a new windows 11 computer from an old windows 8 computer. So I exported my Thunderbird profile on the old computer, copied it across to the new computer, installed Thunderbird on it, then imported the profile. All my local folders are there with their historic emails, but there are no read emails in the inbox, only the unread ones ?? Be grateful for any explanation of why this is and how I get them back. thanks Martyn Jones

I recently migrated from a much older version of Thunderbird where I had been using the Mail Merge add on. In 151/152 most of the variable fields are no longer recognised. Below is the list provided by the developer. I can only get FirstName LastName and PrimaryEmail to merge correctly I troubleshot with Custom1 JobTitle and Nickname to no avail. I've emailed the developer. I suspect Thunderbird has changed the names of the fields in updating the Address Book. Has anyone got a current list of variables for Thunderbird since the Address Book has been rebuilt? Thanks, Greg

{{DisplayName}} {{FirstName}} {{LastName}} {{NickName}} {{NamePrefix}} {{NameSuffix}} {{AdditionalNames}} {{PrimaryEmail}} {{SecondEmail}} {{HomePhone}} {{WorkPhone}} {{CellularNumber}} {{FaxNumber}} {{PagerNumber}} {{HomeAddress}} {{HomeCity}} {{HomeState}} {{HomeZipCode}} {{HomeCountry}} {{WebPage2}} {{WorkAddress}} {{WorkCity}} {{WorkState}} {{WorkZipCode}} {{WorkCountry}} {{WebPage1}} {{JobTitle}} {{Department}} {{Company}} {{Custom1}} {{Custom2}} {{Custom3}} {{Custom4}} {{Notes}} {{BirthYear}} {{BirthMonth}} {{BirthDay}} {{AnniversaryYear}} {{AnniversaryMonth}} {{AnniversaryDay}}

Hi,

I use Thunderbird 152.0.1 (64-Bit) and I only have three items in the files & attachment section of general settings (JPG, PDF, Excel). How can I add more items, for other file types? Is there an easy way to do this or does this mean I have to deep dive into the configuration of Thunderbird?

And would it be possible to add an item to declare that website links in e-mails have to be opened with Firefox in private mode, which is not the standard browser on my machine?

Thx!

duplicate of /questions/1591698 thread

I have Juno Email Accounts ; What are the Settings ? ... Incoming, Ports, Outgoing, Ports

Mozilla Thunderbird Will Not Install on Win10 Machines ... The Auto Settings Algorithm has issues.

Email Address : [edited] @Juno.com - TextMail : [edited]

/edited email and phone# from public community support forum

To my new computer Thunderbird has just fetched the INBOX-mails from the IMAP-server, not my many subfolders, not the SENT-folder, not the SPAM-folder. This has previously worked when I changed to a new computer. How do I get Thunderbird to transfer these mails.

Email problem. Old Lenovo Desktop, Window 8.0 (I know, I know, but it's my wife's and all she uses it for is email and utube recipes, and she's used to it). I use it for some banking, mainly because the printer is on it. Tbird 115.18.0 (32 bit) -says it's up to date AVG antivirus free

Email through yahoo. It worked fine until, going by the last date it linked email, 10/30/25 at 06:45AM MST When I tried to download new messages Sunday 11/2, it failed.

It pops up a new window "Enter credentials for bababarb@yahoo.com on imap.mail.yahoo.com" In the address window is "https://login.yahoo.com/?src=thunderbird&client_id=(about a zillion characters) Then, in the message window is "Edge: Too many requests"

So, I did the troubleshooting as in Help article. I logged in on the webmail, signed in with the password, and was able to see the messages, many from after the 30th (she gets a ton of sorta spam).

Looking under Account setting> server settings, I find that the security is set to SSL/TLS and Authentication is set to OAuth2. Incidentally, these were set automatically when I set this to a yahoo.com address.

So, I try setting the Authentication to Password and request mail. I get a popup asking for the password. I enter it (the same password I used on webmail) and it replies "Login to server imap.mail.yahoo.com with username bababarb@yahoo.com failed."

Following suggestions on the help article, I got to Settings, and check "saved passwords". Then, again following the suggestions, I remove the yahoo password entry. According to the article, the next login attempt should ask for a password. It does not. I just get the "too many requests" popup. What the hell, I go back and remove the SMTP password, too. Same result.

Anybody else having this issue? Any suggestions?

Something changed. I’ve tried to set up my old AOL email account multiple times using different default browsers, and the setup typically fails. Using Edge, I get “Edge: Too Many Requests” . Using Firefox, I get “Waiting for authorization in login popup…” and then the old rotating arrow. After about a minute delay, the Account Hub reports “Authentication error.” The Thunderbird Account Hub reports the outgoing server settings test good. I’ve changed my AOL email password, and have an AOL application password ready to use, but never get asked. I’ve turned off two-step verification in AOL, but same Thunderbird behavior. I’ve got multiple computers, and this issue is the same on all. I’ve had no problem adding a Gmail and SBCGlobal.net account. Thunderbird is 144.0.1 (64-bit) release. Windows 11 Home, version 25H2. I really don't want to give up Thunderbird, but I need this account badly.