Thunderbird Support Forum

Recently I've had problems with the SMTP server refusing to send my e-mails, I am still being able to recieve them however. When choosing to enter a new window the window where you should put your passwords appear and dissapear at the same time. I've never experienced this kind of problems before. I even removed the account and the smtp account and re-added them back again to see if it would help but to no avail.

I am following the article from Mozilla called Microsoft OAuth Authentication and Thunderbird in 2024. But still it won't work.

Our small business has a handful of Zoho email addresses that we use via Thunderbird on MacOS computers in our office. The computer I am using only has some of the email addresses listed in Thunderbird, and I am trying to add the rest.

Once all requested data is entered in the "Set Up Your Existing Mail Address" screen, we receive the error message: "Unable to log in at server. Probably wrong configuration, user name, or password." All of the data is correct, and I have tried this process different weeks to see if the issue will clear on its own, but no. I've attached a screenshot of the error message.

I have tried this with several pre-existing email addresses and it's giving me the same message, although it did allow me to add one address recently. That newly added, previously existing address is now somewhat accessible via Thunderbird, but every time we open Thunderbird it says "Login to server imap.zoho.com with username shipping@jadeandpearl.com failed." I can access the inbox and other folders of this account in the Thunderbird desktop app, but it is not currently showing new email.

Thunderbird version: 115.12.1 (64bit) MacOS: Sonoma 14.5

Dear

Subject to the following mail addresses: gunter.peeters@scarlet.be

We keep getting the following message when sending emails. An error occurred while sending email. The mail server replied: ip 213.49.30.104 blocked for relaying spam http://www.scarlet.be/pm/?e=f53&s=r&p=213.49.30.104. Please check if your email address is set correctly in your account settings and try again.

We are able to receive emails.

Is it possible to check this out?

Thanks in advance!

Kind regards Gunter Peeters

Translated with DeepL.com (free version)

Hi everyone, My Thunderbird yesterday - without doing any unusual chances that know of - went weird. Whenever I open the programme now it shows a completely different interface and I can't navigate back in any way to the usual calendar, email, contacts. It also seems to be frozen, because when I click settings it doesn't open any window. I have attached a screenshot of how it looks now.

Could anyone help me out on how to get back to regular Thunderbird? I am also a bit worried of losing all my contacts / calendar.

Let me know if there's more info I can give from my end. Any help very much appreciated.

A while ago I subscribed to an RSS, but all that happened was that two empty folders were created and they're impossible to delete. They just return. I run the latest Thunderbird on an updated Windows 11 PC.

I cannot send or receive messages on my Thunderbird a/c. I Believe I have to firstly update my email password from my supplier (Spark New Zealand) but to date I have been unable to do this. When I tried to do this on line Thunderbird indicated they did not recognize my email account at all. What should I do?

Thunderbird 115.12.1 (64-bit) on Linux Debian 12, I have several accounts in a panel on the left. When the accounts are collapsed, they unexpectedly expand and make it difficult to know which account's email I'm reading on the right.

How do I control that behavior, please?

I keep getting "can't connect" message and I have to enter my password for outgoing mail. Incoming comes through no problem. How can I get Thunderbird to remember my provider password for outgoing? They obviously already have it for incoming.

Regularly the messages in some subfolders are doubled. I don't know why or how it was triggered. It is very annoying, because some subfolders contain a lot of messages. Since I don't know how to get rid of this double messages, except by deleting them by hand one at the time, it is a very time consuming matter. I tried repairing the folder, but that didn't work. I already have had a folder where all messages were doubled several times. So every message was there six, seven, or eight times! Is there somebody with an explanation and - preferably - a solution to prevent this?

To the Mozilla Community:

I have a Posteo account and set it up successfully in Thunderbird. Emails and Calendar are both working without any issues.

However, Posteo contacts are not syncing. I used the TbSync / Provider for CalDAV and CardDAV without success. And using the Add CardDAV Address Book in Thunderbird is not working either.

Posteo Support confirmed my settings are correct. (Enter https://posteo.de:8843/addressbooks/johnexample/default in the URL field and replace johnexample with the local part of your email address. )

Any assistance that can be provided to troubleshoot and resolve this issue is appreciated.

Thank you.

--Shaun

Hi, first I've been using Thunderbird for decades and couldn't do without it -- keep up the good work! I have a keyboard shortcut bug and an icon action bug to report, as well as a text formatting suggestion. As background, I'm running TBird 115.12.1 (64-bit) on Windows 10 and have three different IMAP email accounts and a collection of local message folders that I access.

• Keyboard Shortcut Bug: I use the the filter box activated by <Ctl+Shft+K>. Everything works fine when I freshly launch TBird, but after some variable length of time after switching between various apps and activities, when I return to TBird I find that <Ctl+Shft+K> does not switch focus to the filter box. In this state, typing a search string gets lost. I can manually select the filter box and enter a search string, but the keyboard accelerator is not functional. It does not repair itself until I relaunch TBird. I have tried unsuccessfully to isolate events outside of TBird that bring this on.

• Icon Action Bug: I also use the inbox selector icon and a similar problem happens after extended external session activities, but not necessarily coincident with the filter box problem. The inbox selector icon stops functioning to display the new input mailbox folder being selected -- it keeps the previously selected folder in the mailbox window. To switch to another folder, I have to manually open the folder sidebar menu and select the folder I want to display. Again, I have not been able to pin down what causes this to happen. It resets to normal function when I reload TBird.

• Text Formatting: Before the upgrade to SuperNova, when composing/editing a message, I could select disjoint strings (using <ctl>select) and have text formatting options (like text style) apply to each of the selected substrings in parallel. Now with SuperNova, when I select disjoint strings, the text formatting option applies only to the first selected substring. This makes complex text formatting very tedious because I have to sequentially select the substrings and apply the formatting commands. Please restore the previous ability of reformat multiple selected disjoint strings.

Thanks again for your outstanding work on improving TBird!

Regards, Tom Rindfleisch <tcr@stanford.edu>

I am using Thunderbird 115.12.1 (64 bit) on Windows 10 with the email account set up as POP3 for the Gmail account

I have a subfolder under an Inbox (Gmail account) that is no longer showing up. If I search for an email address from a sender that was in the folder, I get a list of emails showing the dates and subject, but if I click on the email, the tab that opens is blank.

My PC crashed, but I can't say for sure when the folder disappeared, other than I know it was there 4 days ago. It the the only subfolder that is missing.

Any help is appreciated. Thanks

Device: Desktop computer - Win 7 Pro Email client: Thunderbird Version 102.13 Server: POP settings

I am a Cox email user and was recently migrated to Yahoo. After I input the correct server settings on the Thunderbird app,each time I click on the Get Message button, It starts downloading all (100K+) the email messages in my Yahoo inbox, including the ones that were already downloaded on my computer from the Cox server. Are there certain settings in Thunderbird that will stop this issue and just let me download new messages? TIA -Craig

It seems as the interface thinks the window containing Thunderbird is longer than it actually is. The bottom part of the interface is missing and there's no scroll bar. This is most apparent to me in the Address book, where part of the fields is invisible, as are the Cancel/Save buttons. When I start Thunderbird, that bottom part of the interface would appear for about a second and then disappear. Resizing the window doesn't help.

When I start Thunderbird in Troubleshooting mode, the interface works fine, but "Reset toolbars and controls" and "Disable all add-ons" doesn't fixt the issue.

It might have started when I connected a secondary monitor, positioned above the primary. I thought disconnecting that monitor fixed it, but I since reconnected it and the issue now won't go away except when in Troubleshoot Mode.

I run a dual boot system with Fedora 40 with Thunderbird installed via DNF and Windows 11 Professional with Thunderbird installed from the Mozilla download site. I have had a Gmail account configured on both sides for some time. Recently I have been seeing very slow (2-3 minutes) outgoing sends from the Gmail account on the Fedora side ( thankfully they are eventually successful), but no such slowdowns from the Windows 11 side. As far as I can tell the accounts on both sides are configured the same (I always take the automatic config option when adding an account). I have also looked at the extra account settings required for OAuth2 authentication with Fedora, and believe they are all correct. I have made sends directly from the Gmail server, and they have no delay, so the problem must be related to communication between Thunderbird and the Gmail server on the Fedora side. Interestingly, I do get the following warning message when opening the Fedora Thunderbird:

Could Not Authenticate -- Imap(imap.gmail.com)

The server for account "imap (imap.gmail.com)" refused the supplied username and password. Do you want to go to the settings for another attempt at logging in, or do nothing?

Login failed, sever replied A000002 NO Invalid credentials (Failure) [AUTHENTICATIONFAILED]

This obviously is a problem, yet it doesn't seem to be fatal, as the server eventually connects, but after the delay. I have checked my account password, and I know it is correct. I would appreciate any insights into what is going on.

Tom Rosmond tomrosmond@gmail.com

This just started recently, and I have no clue yet how it started or how to fix it. I have tried several "fixes" listed on the internet, but no luck so far. I'm running Thunderbird V 102.5.0 (64 bit) on Windows 11. This does not happen to any other programs that I may be running, only TB and only after I delete the 2nd or 3rd email in my sbcglobal account. It doesn't happen with my gmail account that I have running in TB also. The freeze lasts a couple of minutes, and then reoccurs after I delete 2 or 3 more emails. It seems to only affect my "inbox" and not "sent" or "trash". Sorry if this has been asked and answered before, but I was unable to find it here. Would appreciate any assistance to point me in the direction of a solution. Thanks

I have been unable to receive eMails from my internet provider (Optusnet) in Australia for sometime now. I keep getting a "Time Out" message from Thunderbird. I am using the latest version of Windows 11 on my PC.

I have spoken to Optus and confirmed that I am using the correct IMAP (Port 923) and SMTP (Port 25) settings. Is it possible to fix this in the settings menu. Or is this an Optus security issue that they are currently working on.

Kind Regards,

Jay Robertson

I set up a new Windows 11 PC (64-bit) about 2 months ago, and installed Thunderbird Supernova. I allowed MTS to choose all the settings and everything was working fine until about 3 weeks ago I am now running version 115.11.1 (64-bit). I noticed that many messages I recieve at scheduled times every day were not appearing in my MTS message list until sevveral hours (a few actually took 3 days) after their normal delivery times. Checking with the senders revealed no change to the time they were sent. Looking at the messages when they appeared showed that they WERE received on time. Logging into the web interfaces for Gmail and Comcast/XFINITY email revealed that the messages were arriving on time. The only logical conclusion is that MTS has a problem in its IMAP protocol implementation that does not recognize new/unread messages as such, and therefore does not retrieve them. I am legally blind, and up to this point, mTS is the only fully accessible, easy-to-keyboard-navigate email program.