Thunderbird Community Forum

My Computer in Spain worked perfect wit my Emails until about 5 years ago when you upgraded thunderbird

Since Then it will not recognize my LOG IN passwords for both my Google email and my Plusnet email

I have had to access Gmail via there website but I like your set far better

I have had to access plus net via web mail which is very basic

Both Passwords work perfect in England

I have now set up another Computer and this time Thunderbird does recognize my Gmail password but still tells me my Plus net Password is not correct

I contacted Plus net last December from England and they confirmed that the Password is correct Have you any suggestions as to how I can solve this problem

I use windows 7 ON ALL MY COMPUTERS

Yours sincerely

Ron Goldthorpe

good day....ii hope someone can help. the other day i was accessing my yahoo account spam folder and by accident, i deleted the spam folder instead of emptying it. the spam folder is now sitting in the trash and i'm unable to remove it from there. when i log into my actual yahoo account, the spam folder is where it's supposed to be and not in the trash. i tried removing the yahoo account from thunderbird and reinstalling it in hopes that it would rectify the problem, but it hasn't. does anyone have a solution?? i would greatly appreciate any help you can offer. thank you for your time...mike s

Hi there! I and my colleague encounter some bugs with Thunderbird and we would like to seek your advice in regards of the issue.

1. <user a@citizen-systems.com.hk> was supposed to get a cc copy of the email sent by <user b@citizen-systems.com.hk> at Mon, 12 Jan 2026 09:35:19 +0800 but it never reached. The receivers, namely <user c@systems.citizen.co.jp> and <user d@citizen-systems.com.hk>, however, were able to get the mail. <user d@citizen-systems.com.hk> and <user a@citizen-systems.com.hk> are working at the same office and under the same network. Network provider checked the protocol, router, traffic and firewall are working as normal.

2. <user e@citizen-systems.com.hk> found a number of emails that she kept at "Inbox" disappeared on 12 Jan 2026 morning +0800.

She is unable to find it anywhere at her whole mailbox but has to ask the senders to resend them to her.

It would be very much appreciated if you can check and advise how to prevent the issue from happening again.

(PII redacted by moderator)

How could I setup a complex sorting rule? This rule I wish: 1. Sort by date and Group 2. sort Starred Mails at the top and unread mails second. 3. Group this also by DiscussionTread (Starred mails out of context is not helpfull)

I also would like to use this sorting on Android.

I have a windows 11 pc with thunderbird 147 installed. It worked until Jan 16th, 2026. I added the account to my Linux pc that has thunderbird 140.5 ESR inststalled and it works fine with the account from the windows 11 pc.

Thunderbird is reporting error "could not connect to server . . . the connection was refused." However, it seems that it reports this error only when there is no new incoming message. And it does not happen consistently.

Thunderbird is version 147.0. Operating system is the current version of Windows 11 on an HP desktop workstation, new 4 months ago.

I have 4 email accounts set up in Thunderbird. Server settings for the accounts are set to check for new messages at startup and at intervals of 5 to 10 minutes depending on the account and to automatically download new messages. I have confirmed the server settings for the accounts match the settings specified by the ISP. When there is a new message to be downloaded it seems that it does, in fact, connect automatically to the server and download when Thunderbird does its check for new messages at startup or specified intervals.

When I have open the Inbox for an account and click on the "Get Messages" icon or right-click on the account name and then click on "Get Messages" I usually promptly see at the bottom of the window the messages "Host contacted . . . sending login information . . . Checking inbox for new messages . . . there are no new messages to download." That is true even if I do that within seconds of receiving the "could not connect" error. But sometimes there is a delay of many seconds before the "host contacted . . ." message, and occasionally I never get that response to the click to get messages. When I click to "get messages" I never see the "could not connect" error even if the "host contacted" message does not appear.

I have set to show an alert and play a sound when new messages arrive. The same sound is played when the "could not connect to server . . ." error is displayed. The result is the sound may be played every 5-10 minutes. I can tell that this issue does not happen consistently because I might go for several hours, or even all day, without the sound and without the error message. The occurrence or absence of the error seems to be completely random and unrelated to what I may have open on the computer.

Since I do seem to be receiving messages without a delay in delivery this is perhaps no more than an annoyance, but I would prefer to avoid the annoyance. This is not happening on other computers here which are using Thunderbird.

I want to transfer my files from win10 to win11. I tried to use the thumbdrive but my files were too large. I also downloaded the Wave Browser,, but didn't like that. If I cancel my win10 and reinstall Thunderbird on my Win11 will it transfer? I'm looking for an easy method. I'm 83 and not that tech minded?

I have a message filter that copies every sent item to a local folder when I send it. I want this in addition to the normal sent item placed in the IMAP folder.

This works fine, except that when I reply to an email and the subject is prepended with "Re: ", the copy made in the local folder is not prepended with "Re: ".

Why is this, and how can I make sure the copy in local folders is prepended with "Re: " as it is in the IMAP sent folder?

We have Thunderbird installed on 2 computers and, for the last 3 days, we have been to receive, but not send email. We can log in to our email provider online and send from there with no problem, so it's strictly a Thunderbird issue. We use Graceba/WoW for our email/internet, windows firewall, PC Matic AntiVirus, Windows 11, and Thunderbird version 147.0 (this information is the same for both computers). When we try to send an email with Thunderbird, the following error message pops up: "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.graceba.net failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again." Our outgoing server settings are correct; nothing has changed and no updates have been done. Something happened over the course of a day 3 days ago (it was fine in the morning and not fine in the afternoon) that caused us to not be able to send email. Please help!

I transferred to a new Apple Mac Book Pro in Nov 2025. Downloaded and Installed thunderbird version 144.0.01. No problems. Did updates and started to encounter issue with sending mail. Last updated version was 147.0. Had to go back to version 144 to get a properly working Thunderbird.

Is there a bug with version 147 for Apple Mac Sequoia that means you cannot send more than one email at a time from pop3 accounts? I send an email, and then have to quit Thunderbird and re-open if I want to send another email. I have done a lot of testing and checking over the last few weeks to try and get Thunderbird to work properly, but nothing worked. Plus a date edit bug / feature for tasks?

I have several accounts, all pop3 apart from 1 Gmail account. No matter which account I start from, if I want to send subsequent emails from a pop3 account, I have to quite Thunderbird. No matter how long I wait to send the email. I tried saving the email as draft, and send later. Does not work. I did not make a note, but I think in my testing I may have been able to send more than one GMAIL email - it is IMAP. I know I did send 1 email from my gmail account, and then tried one of the pop3, but was not successful. At all times fetching mail has not been a problem.

I did all the standard checks which did not make any difference: the server settings; addons disabled; virus checker disabled. Removed an account and re-added; deleted SMTP server settings and re-added. Proxy settings; and so on.

On my old mac running version 128.14 no problems at all. I compared settings. Could not see any differences.

On the new mac, created a new user, and new thunderbird profile. Added 1 pop3 account only. The problem was exactly the same. So it was not a profile issue.

Decided to revert back to older version 144. PLEASE could Mozilla add a facility to Thunderbird to allow you to use existing profile rather than going through the operating system to get it to use my existing profile. I did get the old 144 version to use my 147 profile. After testing yesterday and today it all appears ok. I can send more than email at a time both from the same account, and from different accounts. What I do notice is it does seem to be slow on making the connection on some accounts. Most of the accounts are from the same host but the connection speed for sending is variable across the accounts from the same provider. My email is purely the words testing and testing in the body so not large. Is that to do with the space I have assigned to email mailbox at the provider side?

One other issue with 147, and do not know if it is connected or a new feature of 147 and that is not being able to directly amend dates in tasks? In the newer versions of Thunderbird I found that I can only amend the date of a task by using a popup calendar and choose the date. In version 144 I can now amend the date of tasks by typing in the date field. Is it a feature / setting of 147 or a bug?

Hi, for years I have had subfolders I created under a major folder called Archive [not the Archives folder you have]. The subfolders have names of people or organizations or topics and are in alphabetical order. Until this year, when I created a new subfolder, it automatically sorted to its alphabetical place [or, perhaps I had the option of sorting when I right clicked the major folder]. But for some months, I no longer have that option and have to laboriously drag the folder into its place among hundreds of other subfolders, which I find difficult. (Sorry--I have aged.) I must have missed some new thing I have to do--???

I entered a question about Thunderbird an hour or two ago (Jan 20, 2026). I started to look for a response, but I cannot find my question on the forum.

I entering this post for two reasons:

  1) I want to see if it gets posted and is visible to me
  2) I hope someone can help me find my post that I entered earlier.

So here goes, I am posting this

Jim A.

Good day,

On one of several computers we use to access email when we try to 'Get Messages' Thunderbird doesn't even attempt to connect to the mail server on two of the accounts set up. All four other computers access the servers just fine. In trying to resolve the issue on the recalcitrant computer I created a new email account with the host and added it to Thunderbird using the 'Add Account' wizard, and changed IMAP to POP3. Once the account was created it logged in and received the 'settings' email from the host, and I was able to send an email to another account. I could see the activity reports for the new account in the status bar. However no reports on the status bar for the original two accounts. I've triple checked port settings etc and up until a few days ago Thunderbird worked just fine on this machine. No changes have been made to the original settings. Prior to adding the new account, when asking to get messages the only report on the status bar was 'Done' without any information reported about contacting, downloading etc. The Done message showed up immediately upon clicking the Get Messages button.

Adding the new account and it working properly tells me my settings are correct and the install of Thunderbird is working. Thank you in advance for your suggestions.

John

Using Thunderbird 140.3.0esr flatpak

Following the [chat faq], I tried to log in with my matrix mozilla.org account following the page instructions. For my @username:mozilla.org account added username in the Username field, mozilla.org in the Server field, then followed the rest of the steps (not entering the password because I'm using mozilla's SSO account, etc).

After finishing the set up wizard, it pops up the mozilla.org page (image below) saying there is an error and there is no further progress is possible. Any suggestions are welcome

My question / subject tells most of the problem. Here it is again in slightly more detail: SPF fail is the part of the undeliverable response to two different emails sent yesterday. What to do? Is down to me or ISP? Is this a Thunderbird problem, or a server level issue? If it is Thunderbird, what action do you suggest?

Hi, The question is in the title. I have imported my Outlook data in this 32-bits version (updated to 140.7) . I would like to keep them in a 64-bits version (147). I didn't find the solution. Thank you for helping me. Michael.