Thunderbird Community Forum

Hello,

Need To Know:

I have used Thunderbird (TBird) for many years. Recently, I moved TBird data from a Dell Inspiron 530 Win 7, to Alien Arora 1250. Unfortunately, the passwords would not go, so I copy and pasted the data for 10 email addresses. All worked well, until 5 days ago when I could not log into the ISP.

Since then, 12 ISP tech support people gave me 12 different was to fix the login problem. The 'logging in' kept trying to login. The only way to stop it is to close TB and restart it. The same happens with all 10 accounts - can't login.

I followed instructions to the letter and nothing worked. Later, a tech at ISP said they have had a lot of complaints from people with Tbird and said it's Mozilla's fault. They all said they don't support Thunderbird. They only support webmail. One even suggested I delete all my cookies. Of course I'm not going to do that.

You would not believe the amount of crazy ideas I was given.

Here is the core problem:

I used both Pop and IMAP depending on the email account. TBird was great with POP and IMAP either.

I changed all the passwords as instructed. I followed the Step-x-Step settings on the ISP web site

The ISP, Rogers, took over Shaw. Rogers, I'm told, dropped support for 3rd party email clients and requires customers to create a new email on their Webmail host. Webmail is WEBmail because it is not Email.

Testing Out TBird:

1. On the old Win 7 TBird (Ver. 68.1.1 (32-bit)) Email works with both POP and IMAP settings.
2. On the new Rig, Tbird (V. 147.0 (64-bit)) worked for a while.

What Happens: -- Due to the issues, I set Tbird to not:, -- Check for new messages at startup -- Check for new messages every -- Automatically download new messages -- Fetch headers only

The two ISP are Rogers Rogers and Shaw <--- just redirects to Rogers. But webmail.shaw.ca still works.

My Rig with the issues: Alienware Aurora Desktop 1250 Intel i9 Ultra Nvidia RTS 5080 Memory 32 GB DDR5 Storage 2 TB SSD + 2Tb HDD Thunderbird Version-147.0 (64-bit)

Is the ISP correct, that Thunderbird may be the core problem?

Thanks for your volunteering - where would we be without you, ~r

Hi! I am a tax accountant. Considering updating from Thunderbird 97.0b3(64 bit) to latest non-beta version. Is this feasible? Is there a separate/special update process from Beta to the latest? Also would like to continue to use my POP account set-up at Optimum(Cablevision) here on Long Island. Email (Outbound)SMTP and (inbound)POP mail servers have to remain the same. So initially , I have to backup all my existing Thunderbird data & Profile.

I have used Thunderbird for a long time; previously used Eudora. The problem which I am trying to prevent is that when I try to send a client their encrypted PDF of their tax returns and related instructions, etc. my document database or data magt system, namely File Cabinet Solutions show in the activity log "Waiting for user input" --- so no email is created which would have all the requisite documents attached. The last time helpful client send feature worked in my tax software, Ultratax, was June 27, 2025. Ultratax could not figure a solution, after several weeks & suggested that I upgrade my Thunderbird.. Can anyone help?

Thank you! Best, Mike Porcari--- [edited phone# from public community support forum] (cell)

My name is Yoshinobu OKUMOTO. I live in Nara prefecture in Japan. I use Thunderbird as my e-mail software. My e-mail address is "ssh6820@asahi.email.ne.jp". I have received a mail at January 29 18:35, 2026 . In the space for name of a sender of the mail, "ssh6820@asahi.email.ne.jp" is written. This is my e-mail address in Thunderbird.

I did not sent a mail at January 29 18:35, 2026 . I wonder who sent this mail to me. 

When this mail was sent to me, a red spam mail mark was attached to this mail.
Usually, when I received a spam mail, I transfer the spam mail to a spam mail folder.
But in this case, if I transfer this mail to a spam mail folder, I worries that transformation might transfer a mail from my acquaintance to the spam mail folder from that time on.

In the main body of the mail which I received at January 29 18:35, 2026, it was written as follows.

" Account is invalid.

When this page is displayed, the total of the account "asahi.email.ne.jp" is invalid.

The procedure to confirm the reason 1. Log-in with a browser, for example Chrome, to the account "asahi.email.ne.jp." 2.If the account is invalid, the explanation is displayed."

In the sentences mentioned above, " Account is invalid.  When this page is displayed, the total of the account "asahi.email.ne.jp" is invalid."
But I can use my Thunderbird as usual except this mail.

Next, I tried to log-in to the account "asahi.email.ne.jp" with a browser Chrome, I could not log-in.

I already received this mail which have the same text three times until now, 1/20 19:17, 1/21 17:21, 1/24 21:04. 

If it is necessary for me to forward to you the mail which I received at January 29 18:35, 2026, I send the mail if you inform me of your mail address.  

I will be thankful, if you give me some advices in this case. 

(Mr) Yoshinobu OKUMOTO

The Thunderbird password I've used for YEARS (and is stored in "Saved Passwords") no longer works. I have two laptops with the same password, and they both ceased (on the same day) allowing downloads (or sending) of emails. This occurs on both my laptops -- one has TB version 115.10.1 w/ Windows 10, and the other has 140.5.0esr w/ Windows 11. It also occurs on my iPhone when trying to access the mail server.

Could the problem be the mail server itself?

Please Advise

Bob Hawkins

I currently use imap with my email hosting provider and has worked well with Thunderbird. However, speeds are getting slower and storage costs have gone up. It is time for me to move non-current emails from my email account to back it up while still accessible. I was wondering if Thunderbird's Local Folders default path (C:\Users\......\AppData\Roaming\Thunderbird\Profiles\......\Mail\Local Folders) can be changed to a google drive folder on D:\ drive. If there are any risks in doing so. Thanks.

I am trying to create filters for all the spam I have been receiving. It mentioned a tools menu for adding additional filters, but I am not seeing a tools menu anywhere,

I need help to log into Thunderbird. I get the same message over and over again (login to server imap.videotron.ca with username...............failed. I've tried several tried and true passwords from before and none fit.

Hello! The other day everything worked as usual, and I shut down the computer for the night. The next morning, Thunderbird immediately crashed/shut down when starting each of the 2 profiles I always use. The 3rd profile, which is the default-release running a different email, still seems to work normally. Thunderbird 115.10.1

I have tried Windows (10) safe mode, as well as thunderbird Troubleshoot mode and working offline, but the issue continued to occur.

I'm at a loss now as to what could cause 2 profiles to suddenly cause it to crash. By the way, one profile is for a gmail account and the other one is for an Outlook account, so they don't seem to be related.

In case it helps, there were 2 Microsoft Visual C++ programs installed or updated, and updates to Microsoft 365 and Google Drive just before the problem started. These were all auto updates in the background.

Any help from the Community would be greatly appreciated. Thank you!

Messages that I have moved to Archive have totally vanished. A message which I needed to keep I found in 'deleted'. I then moved it to Archive - and it vanished altogether. I do not feel in control of this new Thunderbird! Please, is there any way of getting this message back?

TBird Version: 140.7.1esr

Since yesterday I can no longer click through with hyperlinks inside an email message.

I don't understand this.

I have already tried all the troubleshooting items to no avail.

To my mind, a change was made to TBird's functionality and this is stopping the click-through to the default browser and the opening of the page linked.

good day

we are struggling for the past two days to send emails . constantly getting the same error

Sending message failed

Failed to send message.

The message could not be sent because the connection to the SMTP server smtp.golf-south-africa.com has exceeded its expiration timeout. Try again.

PLEASE urgently help me. Thank you

I have removed an iCloud account from Thunderbird but it keeps asking for the password, I have tried removing all references to the account that I can find including the calendar. Any ideas? Thanks

I use the Thunderbird calendar in version 147.0.1. The calendar syncs with CalDav and works great. Although when the reminder pop-up appears i am not able to snooze (postpone) an event or delete na event. Nothing happens and the reminder keeps popping up every 5 minutes (as in the settings) untill the event has passed. Even worse, when i enable show missed missed events, i cannot even delete the old events in the list.

I've been using Thunderbird for many years. My current version is 45.2.0. My computer runs Linux Kubuntu 15.10

So yes, it's ten years old and it's showing its age. I have a new box I built, and have Kubuntu 25.04 installed. It installed the then current version of TB. I have yet to set things up, but migrating is a priority now.

Some solutions say (on ubuntu/kubuntu) to just copy the directory "/home/username/.thunderbird/profile.default" from the old to the new box. I would likely do it by zip, rar or ssh transfer.

If I do that, when opening up TB on the new box, does the data get converted? and if so, is it automatic? It seems to me that after then years, the data format would have some changes.

I'd appreciate any insight on this. Thank you.

I have 2 parallel accounts with the same ISP. As of 2 days ago, whenever I try to send mail, I get this message: “Sending of the message failed. An error occurred while sending mail. The mail server responded: Command rejected. Please verify that your email address is correct in your account settings and try again.” I receive mail as normal. Using the other address with exactly the same settings allows me to send normally as I have for the past ten years! Nothing appears different anywhere in the settings. There were no upgrades that I am aware of. I have since found that I can send from my basic little "travel" computer without issue. Any ideas? BTW, using POP mail settings.