Thunderbird Community Forum

My office has moved our emails onto a microsoft exchange server. I backed up my emails, removed all accounts, settings, passwords and then rebooted. Found instructions online. Went to add account > New mail. The account hub page after selecting "new mail" asks me for my name and email. after I input that, it then allows me to continue. It says "account settings found automatically" and offers me 3 options - IMAP, Exchange or Exchange (with owl add on). I select Exchange. In the left hand box next to the options, It shows all the email details and then at the end "authorisation by normal password". I try to click "edit configuration" but nothing happens, so I select "continue". The page now asks for a password. I input the password the IT shop guy gave us and then press continue but get an error message at the top - "unable to log in at server. probably wrong configuration, username or password". The only inputs available to me are the password line and the "back" or "continue" buttons. No trigger of my web browser occurs in order to input any Authorisation on microsoft via my Authenticator app.

What can I do (besides using OWL - I don't have the spare funds for yearly subscription)?

Thanks

I cannot connect Thunderbird to a primary outlook.com account. I can connect to an outlook.com alias account. I have confirmed this on two Windows 10 machines. I can connect to the primary outlook.com account from an iphone and a ipdad. Is Thunderbird broken?

In the last month or 2, when I delete an email it does not show in the trash folder. I can wait from 5 minutes to even the next time I reboot my puter to finally see it it trash. Sometimes it sends it to the all mail or important folder instead of trash. And if I delete from there, it still takes tons of time to end up in the trash folder...if it even gets there. This seems to be getting worse by the day. I have clicked repair folder, no change, I have cleared Thunderbird's cache, no change. It's also now taking way too much time to load an email that contains a picture. This happens with at least 3 of these gmails. I'm at a loss here and extremely frustrated and about to change these gmails from imap to pop. win10 and TB is up to date. But it doesn't compact folders as much as it used to either. Any help appreciated

This past Saturday (21st) I noticed it was taking longer to get emails from Spectrum. I had to click the Get Messages button several times and eventually the box to put in my password would pop up. After putting it in the emails would finally show up. This continued into Sunday, but by late afternoon I was getting no emails from Spectrum. I tried sending a test email from Thunderbird and got the following error message:

An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: impout007.msg.chrl.nc.charter.net cmsmtp [my IP address] blocked. Please see https://www.spectrum.net/support/internet/understanding-email-error-codes for more information. AUP#Out-1120.

I went to the Spectrum website to look up the error message and found this:

The IP address you’re trying to connect from has an issue with the Domain Name System (DNS). Spectrum requires a full circle DNS for emails to be allowed through. Verify the IP you’re connecting from, and check the IP address to ensure a reverse DNS entry exists for the IP.

At that point I called Spectrum tech support, spent about 2 hours talking to 3 different people, but I got no solution. I was able to verify my IP address is not blocked. I was basically told everything is fine on their end, so I should contact Thunderbird. All of my emails are still on the Spectrum website. I can send and receive on that site. No changes have been made to account settings or my password. I’ve tried to find an answer using Google and Youtube, but nothing so far. I did look on the Thunderbird forum, found a post from someone who was also having trouble with their emails and Spectrum this weekend. I’ve downloaded the latest version of Thunderbird, 153.1. One of the tech people suggested I use the Repair tool in Thunderbird on one of my folders. I wish I hadn’t. I used it on the Inbox folder and all of my emails disappeared in Thunderbird. They’re still on Spectrum’s site. If anyone has an idea for a solution I’d appreciate it.

As I was about to post this I opened Thunderbird and about half of the emails from my In Box have reappeared.

“My Spectrum email address is [redacted]@charter.net. Spectrum webmail can send and Thunderbird can't receive or send. The outgoing server is mobile.charter.net and the connection times out. I tested the connection from my computer and ports 587 and 465 both respond successfully. Thunderbird is set to No Proxy. when i tried to send today, it gave me this message, "Sending of the message failed. The message could not be sent because the connection to Outgoing server (SMTP) mobile.charter.net timed out. Try again." i contacted spectrum about this and now when i try to send, it says nothing and the message never arrives.

Can't send emails on my computer on internet out of fredfam@frii.com since about 8/23/26. Couldn't solve problem. Added my Gmail account to Mozilla about 9/5/26 to keep being able to send some emails. Sending in Gmail failed since about 9/9/26. Problem somewhat corresponds to update of Mozilla 153.1.0. I still receive incoming emails on Mozilla laptop for both email addresses. On 9/13/26 all my Mozilla calendar events disappeared for several months and when I enter new events now, they disappear next time Mozilla loads. Running Windows 10, have not had such problems before. I've checked and changed Port settings many times, no result. My router provider detects no problems with internet connection. Is the OAuth process causing the issue with sending on outgoing server.

I have 2 Android phones. Both phones send and receive fredfam and gmail messages correctly between phones when having good tower contact. My gmail web browser account correctly shows send & receive. My FREDFAM web browser correctly shows send/receive messages.

My computer, Mozilla, receives messages sent by either phone for both email addresses.

I've had Mozilla software updates series 153.1 thru 153.2 from 8/23-9/2/26.

I had to use my Gmail password to enter this help system as my password for my FredFam account or password indentifying my laptop would not work to enter this help system. Something seems really messed up in my Mozilla setup/version. Thanks, Dave Freddy

I've been using Thunderbird version 155.0 with only a few issues (reported in other posts).

To investigate one of the issues I've had to create a new profile for testing. I've managed to set everything up except for my default font for outgoing emails. If I send an email with say, four lines of text, I can format each line to be a different font and the received email reflects the different fonts for each line.

But Thunderbird isn't remembering the last selected font. So if I send a second email (without re-selecting any font) the recipient receives it in some naff mono-spaced font. I guess there's somewhere where I can set up the default font for my outgoing emails but I haven't managed to find it yet. Can anyone help?

Have been working with NameCheap's Private Email (PE) support for a couple days trying to unsubscribe and hide or delete folders Deleted Messages, Junk, Sent Items and Sent Messages.

Today a chat rep for PE told me these are not native PE folders and were created by a client app. If this is true and as TB is the only client I ever use it would have to be the culprit.

Notably, there remain a couple of unaffected email accounts, one of which is only accessed from an old 68.12.1 (64-bit) machine.

The rep is going to look into removing the folders on their end and I am going to revert to the old version of TB for my machine to see if we can clean up this issue.

Is it possible that newer versions of TB are really creating the unmanageable folders and is there any way that can be stopped???

Have used TB for years, love it and contribute to its support but while these folders appear at the bottom of the list in PE's web client they are inerspersed with the normal (Inbox, Sent, etc) folders in TB and they sometimes have duplicate names (i.e. Sent and Sent Items both appear as "Sent" in TB with only the Properties Dialog showing which is which). Very confusing and pretty much a deal breaker for TB.

It's very odd. Normally moving an email, say from the Inbox to the relevant year's archive, takes "no time at all".

Which is true for all the mailboxes shown on the attached screenshot, EXCEPT for the four at the bottom. Moving even one message from Inbox to Yiddish can take ten seconds or longer (with the dreaded "Not Responding" occasionally). Moving something in the opposite direction is also screwy, only from those four.

I had thought that it was because they're rather large. This first started when there were just Yiddish and MSW, and I split off most of the earlier years into the archives shown. To no avail.

It's only an annoyance, but I'm puzzled about how such a thing could happen.

Also very slow tagging or untagging a message just in those mailboxes.

Moderator Notes:

• need a performance profile https://support.mozilla.org/en-US/kb/profiling-thunderbird-performance

When I sort on correspondents, if, say, I have a message from Susan, messages from Tom, Dick, and Harry will appear in the sorted list under Susan's name. If I then sort under date, Susan's name will remain in the list for Tom, Dick, and Harry's messages, even though the individual headers give the correct name for each message. I noticed this a few days ago, and it's still happening. How do I stop this?

These are some things I have explored:

   • It is happening whether I look at emails in Thunderbird or through Gmail on Google Chrome
   • Even if I clickndrag them from deleted to inbox they fall back into deleted.
   • I’ve tried gmail/settings/all settings/filters and there aren’t any
   • I’ve tried gmail/settings/all settings/forwarding and there aren’t any
   • If I access Gmail via Microsoft Edge, the emails stay in Inbox
   • I’ve looked at various things in Thunderbird and unticked something in ‘When New emails arrive’ because I thought that might work.  

It started happening about a week ago.

SIMPLIFY THUNDERBIRD IT IS EXCESSIVLY COMPLEX. I CANNOT EVEN SEE HOW TO MOVE MESSAGES FROM THE INBOX TO THE RELEVANT FOLDER IN MY LIST. I PERSONALLY BELIEVE FIREFOX AND THUNDERBIRD ARE OVERCOMPLEX AND NEED SIMPLIFIED. SIMPLES. WHY CANT I COPY AND PASTE THE VERSION NUMBER. BLOODY ARESHOLES . AS I SAID IT IS BLOODY OVERCOMPLEX. AT THIS POINT I AM CONSIDERING GIVING UP ON WHAT IS CLEARLY AN OVERCOMPLEX PIECE OF SOFTWARE THAT REALLY DOESN'T LOOK GOOD EITHER AND THERE IS NO OFFICIAL SUPPORT SO WILL HAVE TO LOOK FOR AN ALTERNATIVE. COMPLETE WASTE OF SPACE TOO MANY COOKS SPOIL THE BROTH COMES TO MIND THIS IS WHAT WE HAVE HERE

I have an email account that I have had for several years and I run it under Thunderbird. I have recently opened a Gmail account and understand that I can operate this under the same Thunderbird (I haven't tried it yet so expect a few glitches on the way, as per usual! There are plenty of articles covering this, so I live in hope)! Potential problem is: I have backed up my old profile account regularly and know how to do it (though I've not yet had to restore it and of course hope I never will), What worries me is that if I follow the procedure to add Gmail to my Thunderbird (and it works), will I get a single profile covering both email accounts which I will be able to back up in the way I am used to; or will I get 2 profiles including a new one for Gmail so I will need to back up both? A simple question but I haven't seen the answer anywhere yet!

John Wilson (john @wilson48.plus.com)

How can I change an IMAP server on an existing T-bird account after T-bird deleted the saved password and IMAP server for that account? I tried to change the IMAP server address for an existing T-bird account, but T-bird and/or my ISP deleted the saved password and IMAP server entry for that account, so T-bird cannot get incoming E-mails. I would like to add an/the IMAP server back to the account without deleting the account, adding all of its settings again, and waiting 6 hours for T-bird to re-download all of the most recent 10,000 messages in the Inbox and all of the 15,000 messages in other folders again. The SMTP server and its saved password are still in the Saved Passwords table.

I have over 200 email accounts in Thunderbird, and I am getting constant pop-up error messages that say: "Не удалось открыть индексный файл для 'Входящие на [email]'. Возможно, произошла ошибка на диске или полный путь превышает допустимую длину."

I don't need help fixing the emails themselves, but I need to permanently disable these pop-up alert windows because I will soon have over 2000 accounts and I don't want 2000 errors popping up.

I am using the latest version of Thunderbird. I have tried looking for "about:config" or the "Navigation Toolbar" to change the settings to "false", but my interface is heavily customized and I cannot find the menu or the address bar. I need a step-by-step guide on how to disable these error alerts, preferably using the Windows Registry or a configuration file if the menu is hidden.