Thunderbird Community Forum

I have an Orange.re email address, and whilst I can receive emails, I am unable to send emails. Any ideas why? I have verified the smtp server and settings.

Firefox on this Windows 10 computer stopped providing an email Send option about 2 weeks ago. I still receive all messages fine, but must use Firefox on an older windows 7 computer to send emails. What can I do? Other internet receive and send functions are still working. The problem is only with email.

Hi, I was just contacted and completed a survey, and signed up for your newsletter. I saw what looks like new products. I wondered if I need to download/upgrade?. Thanking you

Every time I send a message, it duplicates itself. Any help in removing this problem in the settings will be appreciated. Please keep in mind I'm not that savvy with settings so if you can keep this simple like me, that would be great. I'm using version 151.0 64-bit on Windows 10. Hopefully someone be able to help me resolve this problem.

Thank you, Joe

Good morning

Since this morning (05/03/2026) Thunderbird freezes within a minute or two of opening the program.

Everything in the program freezes up. I cannot even close it.

I am running Version 140.8.0esr on a Windows 10 PC.

Initially I was getting a pop up warning message that ask me to confirm if I wanted to send an email with attachments of over 20 MB. There were 3 or 4 such messages. I had not tried to send such emails.

I checked the Outbox in Local folders for old messages, but it was empty. I also checked the Unsent messages files in Local Folders in the Profile folder. I deleted the Unsent Messages.msf file to no effect. I renamed and replaced the Unsent messages file. Also no change.

I checked for crash logs but there are none.

I have run out of ideas as to what to try next. Does anyone have any advice?

I have forwarded (from my Thunderbird account) an email from our local hospital about an appointment to my mailfence address three times now, but all three were deemed undeliverable by the mailer-Daemon. I removed all links on the third attempt in case that was the problem, but no luck.

Error code: 554 Rejected : Spam ?

For further assistance, please send mail to postmaster.

How do I do that? Is my question. Is there a 'Postmaster' address to use?

Many thanks David Edwards

Running Win10, all the sudden I'm getting Not Responding messages, failures to connect to server, and slow deleting of emails. I tried everything: uninstalling/reinstalling; running on troubleshooting mode; checking compatibility. Nothing works. Any ideas?

Thank you

I can get a couple hundred e-mails but none since 5-31-2026. I can see later e-mails in yahoo but I use thunderbird because yahoo is too cumbersome to use for just E-mails. I sometimes get a message that my account is being processed. I have had this problem before but can't remember how I got out of it. I am computer literate but I am also 91 years old. Think Biden! I need emails! I am frozen in the middle Roku install because I never got their code and they are now frozen.

Hello, I am using thundebird since 2022. I need to use new PC and transfering all emails, However some [sub folder] does not go through. we tried several times and try delate special character, but it did not go well.Ex.folder name Malaysia has subfolder but Aus is not.

Is there any solution?

Best Regards,

I have an address book setup with a number of what I'll call sub books for want of a better name. I used to be able to copy a contact from the address book to a sub book. I have either forgotten how to do that or something may have changed. I tried to drag & drop the address from the main book to the sub book but that doesn't work any longer. What am I missing here?

This is actually the same in Firefox, and both only since today, working fine before:

Typing Ctrl-C does nothing, Ctrl-X deletes whatever is selected, but it does not end up in the clipboard. In fact, if the clipboard contains something, it will be removed (Win-V still shows it, but it can no longer be pasted). When copying from somewhere else, pasting with Ctrl-V works.

AFAICT, no issues with any other programs.

Latest versions of FF (151.0.2) and Thunderbird (151.0.1), on Windows 10.

What could be wrong?

Thanks, Ralf

I need to save all my emails in outlook on my harddrive so that I can change from Imap to POP. Reason being is that optusmail has taken over some of my folders in Outlook and transferred them into optusmail without my permission. All my existing emails in outlook are now deemed to be part of optusmail, so the mailbox is always nearly full. I need to retain my existing email address. I have been advised to make the Imap/POP changeover to restore my control of my emails in Outlook. Will installing Thunderbird allow me to avoid all these other actions to achieve email control ?

SEARCH MODE IS NOT WORKING IN MAIN OR SUB FOLDERS. AS A TEST, I SEARCHED FOR A WORD THAT I KNEW WERE IN THOSE FOLDER[S] AND IT COULD NOT FIND. IT SHOULD NOT BE THAT HARD TO DO; THIS ISSUE HAS BEEN DOGGING ME FOR YEARS AND I JUST MOVED ON WITH NO ANSWER. PLEASE HELP.

Two identical spam emails came in, and I deleted both from my Inbox. Both had attachments. Deleting them moved them to the Trash folder. When I went to the Trash folder, I found both emails had been combined into one file. Is that "threading"? I don't want any emails to be combined together EVER. Previously I had checked the "Unthreaded" box in Settings; so if this was threading, why did it happen?

Another question: I couldn't find anything to do with this combined file but to delete it. Did the act of deleting it also delete the attachments, which probably contained viruses?

This "threading" business has been going on for years now. I always check the options that supposedly disable it, but then it keeps happening.

Hallo Zusammen,

bei der Neueinrichtung auf einem neuen Rechner fehlt mir der Ordner für gesendete Mails.

Ich habe die Anwendung auch schon komplett deinstalliert und wieder aufgespielt. Hat sich leider nicht geändert.

Was kann ich noch machen?

Beste Grüße

I had to log in this morning, the first time as its automatic, and when i did all my folders and emails have gone. Where are they as there is important information in there which i need. The page layout is different too as i can't delete anything. HELP

Why does the Thunderbird search for an email with certain information no longer work? It used to work OK. Now it usually fails to find any messages with the selected data. eg search for all messages that have jv16 in either the subject or body text. I know there are several in my Thunderbird but they are no longer found by the find function (although they do exist as found by a manual search).

Couple months back had to restore computer. Wouldn't let me add my POP gmail account, said had to use IMAP. POP was no longer accepted or something to that effect. So I got IMAP set up. (Of course, I did save my old POP folder with some messages in it.) Ever since setting up the IMAP folder I only get maybe 30 messages each morning. Never more. Which is no way right. I've googled and tweeked the synchronization/storage settings and the server settings. Nothing works. I'll spend hours googling suggestions and trying them, then get frustrated and move on. Then a week or so later I go thru it all again. Nothing changes!! Still only get the very few emails each morning. About 30 or so minutes after the initial download of messages, I'll get a pop up saying imap connection lost. This is SO frustrating. I have no idea what to try next. I never had this kind of issue with any of my POP accounts. Any suggestions? I've probably already tried them but will certainly give it another try. Thanks! Lynn