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Running 149.0.2 on Mac. Reorganized IMAP folders in Roundcube webmail. Thunderbird still shows old structure. Deleted folderCache.json, no change. No Subscribe option in right-click menu. Many thanks!

New user - I recently moved thousands of messages from my inbox to a local folder.

At some point, Thunderbird asked me to compact folders and I said yes. I noticed today that I am now missing about 13 years worth of messages from my local inbox folder.

Since I moved them, it deleted the messages out of the original inbox (I also logged into that account via the web and they are not located in the trash on the server either). There are now only a handful of messages there.

Does compacting mean that messages are deleted? Everything else I read said specifically that it would NOT delete messages. Any tips on how I can recover some really important messages? (It deleted about 13 years worth of messages from early May 2026 back to mid-2013, so there are recent messages in there I really need!).

Steps already taken: I tried using "repair folder" and that did not work. I do not have any automatic filters set up. I tried locating my Profile, and moved the "msf" files to my recycling bin, as I read that deleting the msf file would rebuild the index and display emails that had disappeared. Nothing changed. This was new for me so perhaps I did something wrong? I haven't emptied the recycling bin yet so the files are easily retrievable if necessary.

Help setting up first email account (protonmail.com) Keep getting: "unable to login at server, ether config, or credentials" error.

Hi,

My mail account was recently migrated to office365, and I saw that Thunderbird v145 and later supports this natively without the use of a plugin.

However when I follow the instructions to set this up I don't see the Account hub in the same way that's shown in the article.

https://blog.thunderbird.net/2025/11/thunderbird-adds-native-microsoft-exchange-email-support/

instead I see the one attached.

I've tried this on both Linux (ubuntu 24.04) and Window 11 both with my original profile and a completely blank installation. On Linux I've used both the Canonical supplied Snap (from the monthly/stable channel) and the download directly from thunderbird.net.

Any help appreciated.

I can see that there has been a reply or a messages was forwarded and when I right click for the menu "Open" may not even appear at times. When it does appear "Open in Conversation" is not always presented as an option even though there has clearly been conversation as I can locate reply's in the Sent folder. Sometimes it's there but when selected it opens a tab that only shows the email and none of the conversations. It's hit and miss and I can find no rhyme or reason. Any help would be greatly appreciated. Also, I would love to Testflight Thunderbird on Apple. Thanks, Sue

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 just transferred my website to crazy domains and in order to set up email they need DNS records for thunderbird. I dont know how to access this. Could you please provide these for me.

I successfully set up three of my Google Gmail addresses on Thunderbird. I tried to set up my fourth and primary Email address, which is on a Spectrum server, using the absolutely correct address, user name, and PW. Thunderbird will not accept it, saying there is an "authentication error", but not identifying what it is. How is it possible to fix an error, if no precise error is specified? Thanks for any help anybody can offer.

Phil (cpliechty@gmail.com)

A few days ago I lost all of my saved email messages, plus "sent" emails, and "deleted" emails. I had important information stored there for future use. I am hoping to be able to retrieve it. Any help would be appreciated. Thank you!

I am trying to add an email address to thunderbird it is an outlook email address [edited]@outlook.com I have checked the address and the password and both are correct however thunderbird says that the configuration is incorrect and will not accept it. also I have it open in another browser window will that cause problems ?

I am using Mail Merge to send messages, and want to have the date in the body of the message change to the date I actually send the email. Or I have a draft email that I eventually send. Is there a field that will insert today's date (to compensate for me forgetting to change the date manually)?

Unable to add personal Hotmail/Outlook.com account via IMAP with OAuth2 Hi, I'm unable to add my personal Microsoft account (@hotmail.com) to Thunderbird via IMAP despite trying every solution I could find. My setup:

Thunderbird (latest version), macOS Sequoia 15.6.1 Account: personal @hotmail.com

What I have tried:

Manual IMAP configuration with both smtp-mail.outlook.com and smtp.outlook.com as outgoing server OAuth2 authentication — the Microsoft login window opens, I successfully log in, but Thunderbird still throws "Unable to log in at server" Enabled cookies for all Microsoft domains (outlook.com, login.live.com, login.microsoftonline.com) in Privacy & Security settings Enabled 2FA on my Microsoft account and generated an App Password, then tried with Normal password authentication — same error Toggled the experimental Account Hub off and on, tried both the new and old account creation flows Restarted Thunderbird multiple times between attempts

What works: My institutional Microsoft 365 account (@hnu.de) connects and syncs perfectly with identical IMAP/OAuth2 settings. The issue appears to be specific to personal Hotmail/Outlook.com accounts. Has anyone successfully connected a personal Hotmail account recently? Any help is appreciated.

Trying to get the mobil version to work. Can the mobil version coexist with the PC version? I tried leaving messages on server, but no joy. Got through the setup OK, but the mobile version want a signon to Google

I use Thunderbird to store loacally some email from gmail and delete it from the online server.

Until october last year it was working flawless, to day I need to read an old email and I discovered that locally since october of some email is only stored the subject and somtime I only have the ticker that increase in the stored email email, but there is either not title or subject. I didn't change any setting in my computer or in the antivirus,, the only thing is that I perform the update of thunderbird as usual. Is it possible to recover these emails or they are gone forever?

Best regards

送受信メールが表示されなくなりました。 テストメールの送受信は問題なくできていますが、thunderbirdメールソフトには表示されません。 XserverにWEBメールは生きています 表示されない問題を解決するためにAIに聞いたところ、「受信トレイ→右クリック→最適化」を実行したが、それまで表示されていた過去の受信メールがすべて消えました。 本体からメールが消えたのかAIに改めて聞いたところ、画像の「INBOX」の状態になり、消えてしまった可能性が大きいとの回答でした。 ウィルスバスターを導入しているので、それが干渉した可能性も考えられます

対策として「アカウントを削除して、新たに設定しダウンロードを提案されました。この方法で復活するでしょうか

https://g.co/gemini/share/6a7da4881c86

My correspondents keep getting shuffled and applied to the wrong subject line in the inbox. It was suggested that I right-click on the folder, select "properties" and then "repair." That clears it up, but only for a matter of hours. Plus, any emails that I have open get closed and then I have to find them again.

One person who suggested that I right-click the folder and repair it said if that didn't work, there was a more technical fix. I need it!

Help!

When I open my Inbox on Thunderbird for Android, the notifications are still displayed even after I close out of the app. So I have to always go back and manually swipe away all the notifications.

I select multiple messages to delete, and it doesn't delete all of them. I have to go back and select again to delete the remaining messages. Sometimes more than once.