Thunderbird Community Forum

[6/12/26, 10:49:22 PM GMT-4] Applied filter "Blocked Sender List" to message from The Home Depot® Consumer Credit Card <citi@info15.citi.com> - James, Don’t forget to use this special offer to get your Summer projects going! 🌼🌺 at 6/12/26, 10:02:27 PM GMT-4 deleted

[6/12/26, 10:49:22 PM GMT-4] Filter action failed: "Move failed" with error code=0x8000FFFF while attempting: Applied filter "Blocked Sender List" to message from The Home Depot® Consumer Credit Card <citi@info15.citi.com> - James, Don’t forget to use this special offer to get your Summer projects going! 🌼🌺 at 6/12/26, 10:02:27 PM GMT-4 deleted

The sent message is deleted but I get Filter action Failed.

I am trying to set up my t-online.de account on Thunderbird, so far without success. A message appears: Thunderbird failed to find the settings for your email account. I don't know where I am going wrong.

None of your "topics" addresses my issue at all. Where is your user manual? I'm trying to figure out how your "retention" works. Also how to get a message filter to run on a specific folder daily.

Thanks, Saroj Gilbert

A category (Daily Brain something) of emails that are clearly spam (you even think they are spam) are landing in my Inbox every day. I have my email set to not allow emails from any addresses that aren't in my book. If I follow their 'unsubscribe' link, I just get more of them. This is the latest one: ar849137@ocotille.com with a Reply To address of: 3527_rep_Y2pnZGVzaWduc0BlYXJ0aGxpbmsubmV0@ocotille.com Every one is different. Why are these getting through? Thanks Cary

hello, i had a friend and his father needed urgently to migrate his thunderbird with 1 email to a new computer but he wasnt able to setup the emailaccount in a new german client. i helped and the problem was that the setup asks for the password but it meant the password from the emailprovider to allow thirdpartyapps access. please consider to improve the german setup wizard by adding a new textline to clearify. best regards

I am looking for a way to disable the attachment preview pop-up for incoming emails. Almost all attachments I receive are PDFs and it doesn't work with them, only showing a black screen. Further, the popups cause my auto-hide taskbar to keep unhiding and getting in the way of my work.

I have a Yahoo.ca email address and have been using Thunderbird to retrieve my email for years. For some reason, a window now pops up to Rogers.com and they want me to log in there. This is not a Rogers email address and it is separate from Rogers. I had this issue before and this forum managed to get me back. My settings are correct. I have deleted the profile 5 times and added it back after a computer restart and still nothing.

I'm asking this question so I can post some helpful information for people wanting to create a backup of their profile.

If you are using Windows OS and you got your download from the official website: https://www.thunderbird.net/en-US/thunderbird/all/

How do you locate the correct folder to backup? The backup must contain everything, profiles, mail accounts, emails, address books, calendar, preferences - the lot. The backup can be used to transfer between computers.

Hi, bit of a strange ome. I have 4 email account in Thunderbird. One is my AOL account and one is my wifes AOL account. This morning my emails suddenly started appearing in both my AOL account and my wifes AOL account while her emails don't appar at all. I've deleteing her account and setting it up again but the same thing happpens. I'm at a loss. Can you help?

Hello, from time to time my Thunderbird on my desktop PC running windows 10 doesn't receive emails, while they arrived on my I Phone 8. Checked my Telstra web mail, all emails are there so what is stopping getting to my desktop PC? I thought the Thunderbird receives emails than synchronize with my I Phone? As you can see from my 2 images the Telstra is up to today as is my I phone But Thunderbird is 3 days beyond. Tomorrow it may back to normal or the next day? I am returning to this message the next day 16/06/2026 1 more message on my I Phone, still nothing on my Thunderbird.

An other problem I get with Thunderbird is that a message appears on the right bottom of my screen: "Mozilla Thunderbird Connection to server mail.bigpond.com timed out" and/or "failed to connect to mail server imap.telstra.com" If I try to send an email after the above notifications, I get the "Connection Refused". I know than to just walk away. I am using Starlink as Telstra here doesn't work as I am on the fringes of Melbourne in a BLACK HOLE. Any help will be gratefully received. Thank you for reading this. Regards Ilio Pieroni

Hi, Since approx. 1 month, I cannot receive nor send emails from my Windows 11 desktop computer. My ISP is Videotron and they tell me that from their end, everything is fine and the configuration is fine. If I use the Videotron Web Service, I can send and receive emails using the Videotron Web Services but these are not reflected on my Thunderbird email interface. If I try to send an email from Thinderbird, I get this message # # * * Sending of the message failed.

1. # * * An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: smtp.videotron.ca Videotron ZGdcwFfPIz2we service temporarily unavailable AUP#EML-016.'

On my Android smartphone, Thunderbird is installed and it works perfectly...I can send and receive emails.

What can be done to make sure that I can send and receive emails from my computer, and to keep the smartphone and computer synchronized. Thank you

Thunderbird 140.7.1 i have a subfolder called "purchases" which I add to on a regular basis. Suddenly no messages appear after May 2014 I have logged in directly to the mail server, and all the missing messages are definitely on the server. I have checked the local filters, none are set. I have tried properties/repair. I have tried removing ~/.thunderbird/xxx/ImapMail/mail.myserver.com.au/INBOX.sbd/purchases.msf

Could it be a problem with dovecot indexing on the server? all the other subfolders seem to work fine. It's just this one.

I've been using Thunderbird on Windows 10 since last year sometime. Currently I'm on version 151.0.1.

I've 4 x mailboxes here and since yesterday, 3 of them show me an unusual message when checking for emails. I tried attaching a screenshot but although the screenshot uploaded, I couldn't find a way to insert it here. But the message says Unable to write the email to the mailbox and asks me to check if I've write privileges (which I have) and to cheek the available disk space.(currently 101GB free).

The message is happening 2 or 3 times each day and lasts for about half an hour, then everything works fine again. Has anyone else seen this??

I had a great Thunderbird Emoji add-on that is no longer supported. This.

https://services.addons.thunderbird.net/en-US/thunderbird/addon/emojiaddin/

It no longer works on updated Thunderbird, and shows it hasn't been updated since 2022. I'm on Thunderbird 140.11 on my Linux Mint. The image the plugin inserts in message bodies is broken. Is there another/similar add-on?

Please ask Thunderbird to stop making a tab on my taskbar every time I open an email. I have to close each one individually, and I never asked for these to be shown, and I don't need them shown. This is a tedious extra chore. I already have access to emails that I receive in my in box. It shows the history. I don't need any other index to them. Do you know how to stop making any other such tab or index? If not, please pass this on, and please don't say that you can't pass on this request. Someone decided to make these tabs show up on my screen and task bar, and to require me to close them by clicking on each little red X mark. I should be able to make contact with whoever makes these decisions and writes these programs, and to provide feedback and suggestions to them.

My Address Book appears to be old and out of date. There's at least 10 years of emails in there somewhere. Random old emails are there, but what's visibile is not really useful here and now. How can I restore at least some degree of usefulness?

I'm trying to trim down my hard drive, and I see that my Profiles folder has 2 ImapMail subfolders. In the first of them, imap-gmail, I have 14 All Mail files numbered "-1" to "-13" plus the most recent All Mail (today's date), unnumbered. Most of these All Mail files are quite large. Can I delete all of them except the most recent, unnumbered one? In the second subfolder, imap-gmail1, the files are all from before 2025, and instead of multiple "All Mail" files I have multiple "rstmp" files. What's the deal? Can I delete this whole folder? Is it a backup? Thanks for your help. FYI, I'm up to date in Windows 11 and Thunderbird, with a fairly new computer. I hope I've provided enough into. Looking forward to your help. all the best, Steve