Thunderbird Community Forum

Just started Thunderbird and all my accounts and mails are gone. All empty. I tried to import from default: C:\Users\Korisnik\AppData\Roaming\Thunderbird\Profiles\fjv3tdcd.default and now I have mails until 2025, all from year 2026 is gone. What to do???? please answer to [redacted email from community support forum]

Hi, I have multiple profiles on my computer. How do I make sure all emails on the older profiles is on my profile I am now using? I would like to delete old profile 16+gb but want to make sure all emails are in the profile I am presently using. I think all emails are in present profile but would like to make sure. I have other older profiles but they are small in size. Trying to recover some disk space on my ssd.

In TB 155.01 when I click on Delete the email leaves my Inbox but does not display in the Deleted folder. If I look at Properties in the Deleted folder it shows the correct number of messages in there but the messages themselves do not show in the right hand window. Thus there is no way of seeing what the messages are, just the total quantity in the folder.

Hey guys,

So I am trying to create a rule that will delete emails on the server that are 360 days or older.

I know you can go into settings...

>> leave messages on server >>>>>>For at most ,,,,,,,

But from what I have read that only deletes emails on server from when they were downloaded into thunderbird.

I am new to thunderbird so that wont work for me.

So I went into message filter....thinking this would work

>>>>>age in days > is greater than > 360 days >>>>>>>>>>>Delete From Pop Server

But nothing happens???? Help!

Your input is appreciated

This morning, my email Inbox is empty. I use Thunderbird for four email accounts, and three of them are fine, but the fourth one has an empty Inbox this morning. I didn't (intentionally, anyway) move the emails anywhere, and they do appear to be in the All Mail folder, so I didn't lose them entirely. But I keep my emails mostly in my Inbox and they aren't there anymore.

Any ideas what happened to make them disappear and how I can get them back to the Inbox?

Thanks!

I have downloaded and installed Thunderbird Email on my computer.

I put in my name as requested. Enter my Gmail account and go through all the steps signing in only to get a message that there is an error and I cannot be signed in.

Extremely frustrating to not be able to use this app.

Will be uinstalling immediately.

Almost anything I try to do with Thunderbird, even replying to emails requesting advice, I come up with errors, such as:

Sorry, you have been blocked

You are unable to access thunderbird.net

upstream request timeout

upstream connect error or disconnect/reset before headers. reset reason: connection termination

When replying to an email or sending a new mail I get the message :- An error occurred while sending mail. Server responded : You need to authenticate when sending mail from (ip address) Please check "message Recipient" and try again. How do I authenticate ? Thanks140.7.1

Здравствуйте! 1. Почтовый клиент стал показывать в папке "Входящие" по 10-15-20 копий одного и того же сообщения. 2. Когда-то была создана папка "Pending"во входящих сообщениях. Сейчас почтовый клиент сам по себе поместил ее в папку "Удаленные", причем во входящих двух разных почтовых ящиков. Создать эту папку как отдельную во входящих не удается. 3. Удаленную папку "Охрана труда" почтовая программа также поместила как отдельную папку в удаленных и воссоздает ее снова при запуске почтового клиента.

I understand that in the immediate future that Virginmedia.com will no longer provide email services for their subscribers is this true.

now i am getting mail but my dad and my brother both said they are sending mail and it says undeliverable I tried sending to my self and it came through I have Thunderbird through Comcast. i see mail in Comcast that is coming through so i do not know why. the only thing i could think of was they tried yesterday when the update was going through i received a mail at 7.15 this evening so i have no idea why it would bounce back did nothing to change anything

Having established a new Outlook account I cannot sign into it properly with Thunderbird - I get authentication failures each time despite all settings apparently being correct, IMAP enabled in the web browser view of the outlook account and so on. Oauth2 set and all server settings good. I have been over and over things. Tried various suggestions of the web to no avail.

I have tried unsuccessfully with three separate machines - two Microsoft 11 laptops and an iMac. All fail.

I can access the account and send/receive emails from a web browser and I have got it working okay with an iPhone, an Android tablet and a Microsoft email client - but not with Thunderbird. I even get a browser popup on the iMac when I open Thunderbird asking if I am trying to sign in - I say yes and it says I am all signed in - but the email doesn't authenticate. I have passcodes all set up etc.

A separate Hotmail account does work with the same Thunderbird client and has the same server settings (apart from the username obviously).

I am at a loss how to resolve this other than move to a different email application.

Any ideas?

I have three email accounts. One is with a btinternet.com domain, and Thunderbird 153.2.0 has started not fetching emails from it while getting all the others. I've removed and reinstalled the account and things work fine for a few days but then it stops again.

All the security settings, etc., seem correct, and I'm not getting any error messages, just nothing happens.

Any thoughts from out there?

I have Thunderbird 153.2.0esr which runs 2 Email filter (on Inbox and on Outbox)

These filters worked for years.

Suddenly, about at the end of July 2026, the stopped working.

I suspect that one of the latest release of Thunderbird make them stop working.

Is it possible? Any suggest?

Also the filter log registry is empty.

Environment:

• macOS, Apple Silicon (aarch64)
• Thunderbird: 155.0.1 (aarch64), Release channel
• Email hosting provider: Hostinger
• SMTP server: smtp.hostinger.com
• SMTP configuration: Port 465, SSL/TLS, Normal Password authentication

Problem: Incoming email via IMAP works normally, but Thunderbird cannot send any outgoing email.

The error is either:

“The connection to Outgoing server (SMTP) smtp.hostinger.com timed out.”

or:

“Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.hostinger.com failed. The server may be unavailable or is refusing SMTP connections.”

Troubleshooting already performed:

• Webmail can send emails normally.
• Thunderbird can receive emails normally.
• SMTP settings and username have been verified.
• Port 465 with SSL/TLS does not work in Thunderbird.
• Port 587 with STARTTLS was also tested and does not work.
• Tested with a different network/mobile hotspot — same issue.
• Tested Thunderbird Troubleshoot Mode — same issue.
• Updated Thunderbird from 155.0 to 155.0.1 — issue persists.
• Direct TCP connectivity from the same Mac was tested successfully:

nc -vz smtp.hostinger.com 465 → succeeded

nc -vz smtp.hostinger.com 587 → succeeded

Therefore, the SMTP server is reachable from the Mac on both ports, and the same mailbox can send normally through Hostinger Webmail, but Thunderbird fails to establish/use the SMTP connection.

Since sending was working normally before the Thunderbird update and stopped afterwards without any SMTP configuration changes, this appears potentially related to the recent Thunderbird update.

Could you please advise whether there are any known SMTP/TLS/socket issues with Thunderbird 155.x on macOS, or any additional diagnostics/settings I should check?

After swapping to The Bat some years ago I decided to come back to Thunderbird again. So I installed Thunderbird 155.0.1 (64-bit) on my Windows 11 PC, and gradually re-created and connected the the accounts I had on the back. I also installed the ImportExportTools NG addon, then exported my emails from The Bat to Thunderbird. So far so good. However for some reason I created an account twice. There are both for the same GMX account, but one is POP and the other is iMAP. This mistake probably happened after a long session of setting things up and I just forgot about the first account.

I looked through the Thunderbird help and the answer most given was to the Thunderbird menu, select Account Settings, swap to the account you want to delete, and then press the large red DELETE BUTTON on the top level of its settings (next to the DEFAULT button). I've tried this and it doesn't work. There's no confirmation dialog (which is what I was expecting) and if I close and reboot Thunderbird the account is still there.

How can this be fixed?

Years ago when I was using Thunderbird there was "fix" for the Advance to next message pop-up, which appears when you press N or P to move to the next/previous message, and that message is on another account. If I remember correctly I think the fix was going into the "debug list" where you could change individual settings if you knew the name of the setting, and set it to off.

Anyway I couldn't find that list at all in the current version (probably a good thing). Is there a setting somewhere or fix where I can turn off this popup?

Hey everyone

I need to remove the line that is added when you reply to emails. It adds added steps when cutting and pasting when I quoting emails when replying.

I have multiple profiles with multiple emails in each profile.

I found a thread here dated 2016 that instructed to add this to the css file.

I didn't have en excisting css file I could fine so I created a folder. >chrome > and put a userContent.css file within that.

This is code.

blockquote[type=cite] {

  padding-bottom: 0 !important;
  padding-top: 0 !important;
  padding-left: 0 !important;
  border-left: none !important;
  border-right: none !important;

}