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For some reason I have lost all old emails in my inbox. I am only getting new messages, but I have many Thats I leaving in my inbox to address later. Please help me to recover them. This hspppen on or about a March 4, 2026

Since the firefox upgrade of March 4, 2026, I have lost all of my old emails in my inbox. These are important items I need to work on before I complete and file away. I need to gain access to them ASAP. Thank you.

Hello,

I love Thunderbird, but I have recently moved to use a Android device for most of my work, and despite that there is now Thunderbird for Android, I found that there is a feature I really need but it is not working there: moving mails across different accounts. I work daily with four different accounts and sometimes I need to move some threads from to another. I had to move to a different email reader because of that, but I would really love to come back to Thunderbird.

Best regards, Patricia.

I've tried setting up Thunderbird archiving according to the documentation to save archived messages locally, and in the same hierarchy they had when I archived them. That is, if I have:

INBOX

   Box1
   Box2

... etc. then archiving would create a parallel structure in Local Folders

However, this isn't working.

I select "Keep message archives in Other (Archives on Local Folders).

For "Archive Options" I select "A single folder", "Keep existing folder structure of archived messages" and "Recreate inbox folder".

However, when I archive something, Thunderbird just creates a folder "2026" (this year) and puts the message in there.

Why are my settings NOT working?

- Tim

Hi all — I’m running into a persistent threading issue in Thunderbird (v.148) vthat survives profile rebuilds and affects only specific conversations.

Symptoms Some threads show the expand/collapse carrot normally.

Other threads (same accounts, same folders, same time period) do not show the carrot.

The pattern is consistent: the same conversations fail before and after a full profile rebuild.

Both Inbox and Sent show a mix of threaded and unthreaded conversations.

No global setting seems to be wrong, because most threads work correctly.

What I’ve already checked mail.strict_threading = false

mail.thread_without_re = true

View → Sort By → Threaded

View → Threads → All

Folder Repair on Inbox and Sent

Full profile rebuild

Re‑added all accounts

Rebuilt .msf files

Verified that threading works across folders (Inbox ↔ Sent)

Verified that threading works across accounts

Verified that threading works for most conversations

Header checks For the conversations that do thread, headers look normal.

For the conversations that don’t thread, the headers also appear normal:

Message-ID: present

In-Reply-To: present

References: present

No obvious corruption, malformed IDs, or missing brackets.

What I’m trying to understand Why would Thunderbird:

Successfully thread most conversations

Fail to thread specific conversations

Preserve the same failures before and after a rebuild

Show carrots in Inbox but not in Sent for the same conversation

Show no global misconfiguration

Is there a known edge case where Thunderbird rejects a thread even when the headers appear correct?

Are there hidden rules about ambiguous References: chains, multi‑server storage, or cross‑account BCC workflows that could cause this?

Any insight into how Thunderbird decides not to show a carrot would be appreciated.

Thanks in advance.

Does TB have a "complication" that I can put on my watch face? Most modern watch faces have slots for data provided by app developers like number of pending messages. Does TB have a complication for watch faces.

Hello,

I've moved last week from Microsoft Outlook from Mozilla Thunderbird on my MacBook Pro laptop for managing my e-mail accounts.

I've added an Outlook account (e-mail xxx@hotmail.com) to Thunderbird. However after using Thunderbird a few days I've discovered that some sub-folders in my private folders are missing.

I've added in attachment an image showing my folders on my mobile phone (using Microsoft Outlook) and an image showing my folders on my laptop (using Thunderbird where both 'Bureau' and 'Instruments & Lumières' are missing).

Thank you in advance for your help.

Best regards, David

Hi, I found occasion when Thunderbird Android app shows incorrect timestamp of messages in Sent folder. Two screenshots are attached. One from Thunderbird Android the other from Gmail android clients. Thanks fro investigating the case, Antal Komar

I apologize for the unhelpful summary line, but I am totally new to Thunderbird and the Unified Inbox is acting so strangely that I don't have any simple way to describe it.

Many (but not all) of the emails are displayed twice in the list of messages.

When I delete a message that isn't doubled, the message disappears from the inbox (as it should).

But when I delete one of the doubled messages ONE disappears as it should and on the other Thunderbird clears the From and Subject fields and changes the date to 12/31/1969, 19:00 -- the changed entry stays in the list and the body of the email is still shown in the lower pane. The only way I can get rid of the message is by selecting another folder (ANY other folder) then when I return to the Unified Inbox the deleted messages will be gone from the list.

I can't believe that this is how Thunderbird is supposed to work, so I assume I have something configured incorrectly (although nearly everything is still at the defaults that the installation gave me).

just installed thunderbird on my new windows 11 laptop (samsung galaxy book 5) and tried to add my comcast email account. i entered the address and password and it took me to an xfinity web page to validate my password for imap.comcast.net. since i'm not on my home network it send a code to my mobile phone which i entered successfully. it then asked my for the address on my account. i entered it and it told me it didn't recognize the address! I called comcast and finally got to speak with a human (no mI'veean feat). We verified that my xfinity account allows third party applications to access my email. That's pretty much all the help she could give me. i've run thunderbird on my home windows 10 desktop with no issues accessing my comcast email. Has anyone encountered this problem? does it have to do with windows 11 settings? any help would be appreciated.

Incoming messages are interspersed with old messages without any order. I tried to corrrect this by pressing "date" in the installation column to the right, but that does not help.

Thunderbird: Suddenly links in emails are behaving very strangely. Whenever I click on a link, the Inbox window is selected and the link is essentially ignored.

Here is an example: At this site

   do-not-reply@stackoverflow.email

when I click on "Special partition of the set $[n]$" the Inbox window comes up. Copying the link, I find it is this:

   https://sg-links.stackoverflow.email/ls/click?upn=u001.
   OPqImZUVClavrirop4vrL7ZIbR0SrdVPtNEAYlGR3VmeeoYNTs2YYZpJH3BMBXZ
   ypFqhwcCL0W4gGDFAApiH3-2BR016USOPYaLANdPKZjlW0-3DmLFi_2PDPOmwor-
   2B6V31hnv8BUMaRG7aWcOmoOP-2F643cEijic3j9TA5gCHyppxjQ9TBY4lsrML67
   biQlFPRhSQCFZ86ah0lQI9n7U5ZVkveDE2052QW-2FwO-2FJ4UcIm81qFMYmU4O9
   ShqKKGy36kM1z-2B0fnN11b-2FmCJIGaFm3B3hOcHelGa2JqxXxo-2F8aMi-2Fab
   n3xpHjNGJDJPOuqQnbUcmzFgjFJLgUlRBoqqXrtNOiG-2BPf6zckqkur9C-2F6-2
   BPScg-2FqxGd62MyveIhjj3E5eymt0AYJwns5QMh0aB7x3ffsUN3-2BKtcGiHEoT
   Isj3JEhymMdbub5Toszk1Y7XWWv8ZpJnhplevIVkQK0wcXBECWPTCeRLfomlTrRy
   Vffv1ElwvyqjmrUdrboHKtWj6uN5LLWErraNc2hr1FSAD1-2BP4p9X2YFH8frIa6
   sfYVg3S-2Fv8soK9qvkx6wfObpB1s-2BGXqPxng1zj5yYUDyibE-2B32qXO1nRXA-
   2FjIL4U2JeijYg8lA7Et8QZWT

This is over 700 characters long, which seems a bit strange.

Any info on fixing this will be greatly appreciated.

Roger House

Migrating from Gmail to ThunderBird- Do I have/where to get ThunderBird email address if I want to "escape" Google? Also a tad confused as to how Firefox/Mozilla/Thunderbird relate to one another!

Thanks, Donna