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I accidentally created an iterative loop using a forwarding Filter and bcc the sender. This resulted in me recieving multiple copies of e-mails each with subject beginning Fwd: Fwd: So I tried to clean them up by QuickFiltering for Fwd: Fwd: and I got a lot of hits for Fwd: alone. Please spare me from search engines based upon the matronly idea that I couldn't possibly know what I want to search for. -Does Quick filter support phrase search?

Hi there, I have several email accounts I use Tbird to manage. One of those is a hotmail account. I have the settings setup correctly for IMAP synchronization. But, after the initial pull of messages, the connection to the server seems to fail? For example, I open tbird, it pulls in new messages, run filters, etc... If I come back and try to reply to a message, the outgoing server will timeout (if you test the outgoing server in settings, it connects. If you reply as soon as you open tbird, it will send a message from that outlook account). I believe this issue is more than just the outgoing server. For example, if I move an email to a different folder, it won't register the move until I reopen tbird? Similarly, sometimes if I try to open a message after tbird has been running for a while, the message will not open/fail to load.

These issues seem to be impacting only this outlook account. I'm really not sure where to go with troubleshooting and looking for guidance.

much thanks, Ryan

The email from ALL of my other active accounts (7 or 8 of them) all download fine.

Only ONE account throws off the Unable to Write Email to the Mailbox!

I have rebooted, I have compacted folders, I have repaired the folder - same result. Only ONE of my numerous emails fails to download messages.

ALL of the email databases are in the same subdirectory that Thunderbird (obviously) has complete read/write access to.

What now???

Not sure where/how to post this, so starting here (and happy to move/amend this posting as appropriate.) 15-Oct-2026

Background: I've got a yahoo ("free") email account for many years, and wish to move the current contents of my Inbox to a folder (on imap, not local). Recently yahoo appears to have moved to "cloud" arrangement internally (not sure, but it appears to be the case.) The problem I'm experiencing (below) I believe may be yahoo's back-end cloud processes getting out of sync with Thunderbird's view of the same activity. Therefore, I'm seeking help on how to accomplish this (=I don't think there is a bug in Thunderbird, rather this is a plea for how to manage yahoo's email service for my account.)

Symptom: Moving large number of emails between folders both hosted on yahoo, peers to my inbox on yahoo, using imap - the "export" imap service). Thunderbird says it completes the task, but many (not all) of the moved emails re-appear in yahoo's inbox after a short time, so this makes moving a large (more than a few hundred) emails a *very* laborious process.

What I'm trying to do: I wish to move my current inbox (has about 7.5K messages) to an IMAP-hosted folder (same account, etc.,yahoo email would see this folder as a peer to inbox). When I select all of the messages on inbox and tell Thunderbird to move these to the local folder, thunderbird appears to indicate the task was completed. If I move a very small number of emails at a time, that does complete successfully (=thunderbird says task completed, and the moved emails do not re-appear in yahoo inbox.)

Thanks for looking at this (long) posting and (particular to moderators) if I've posted this incorrectly or in wrong place, please assist!

Dave

When the font size is increased, it becomes impossible to scroll on the screen where you choose whether or not to save your password in your account settings, preventing you from proceeding further.

I had to change my Google password and I cannot get to my mail. I tried to uninstall/reinstall Thunderbird with no joy. When I try to open Thunderbird, Google responds: "The server cannot process the request because it is malformed. It should not be retried. That is all we know."

I drag messages from Thunderbird's Sent folder into subfolders under Thunderbird's Gmail account but when I log into Gmail directly the messages have not moved out Gmail's Sent folder even though the tags show the subfolder where they should have been placed. What can I do to have those messages appear in subfolders as they do when I am in Thunderbird?

How do I set up Thunderbird so that no incoming email is automatically diverted to my spam folder?

I like TB flagging incoming emails that it thinks is spam, but I don't want TB to automatically divert any emails into the Spam folder. Is this possible?

I use four email accounts on TB. I'd like to set this up for all four accounts.

I somehow have a Spam folder stuck in Trash. This can of course be removed if I manually empty Trash, but respawns automatically when I restart TB. I've made sure that the "real" Spam folder is pointed to correctly in Account Settings.

How can I safely (and persistently) remove this phantom Spam folder? Thanks in advance.

Running Mac Sequoia 15.8.1 I launch Firefox, login to Amazon Prime and when I get to Amazon Prime Video page, Firefox freezes, won't respond at all, and play button shows a rotating circle (see attached). Firefox -does- play video on Youtube and other video websites. Safari on this same laptop plays Amazon Prime Video just fine. All other computers/browsers in my household utilize Firefox to play Amazon Prime Video just fine, so it's something out of whack on this MacBook pro. I have uninstalled and reinstalled Firefox several times with full reboots each time but to no avail. Please provide any other options.

Hello,

I'm building custom firmware for a Makerdiary nRF52840 USB dongle using GitHub Actions.

When I tried downloading the generated ZIP file, Firefox blocked it with the warning: "This file contains a virus or malware."

I removed the blocked download rather than overriding Firefox's protection.

The ZIP contains custom `.uf2` firmware for an embedded USB device. The GitHub Actions build passed its validation checks, and an independent ClamAV scan of the original firmware reported 0 infected files. I subsequently built and scanned an updated version, which also passed.

Original blocked build: https://github.com/flips96-art/hid-remapper/actions/runs/39094413639

Latest build: https://github.com/flips96-art/hid-remapper/actions/runs/39096517313

Latest antivirus scan: https://github.com/flips96-art/hid-remapper/actions/runs/39096868117

I understand that a clean ClamAV scan does not guarantee the file is safe.

Could someone help me determine why Firefox classified this download as malware and explain how to submit it for a possible false-positive review without disabling Firefox's security protections?

Thank you!

I am running Thunderbird 140.7.1esr (64 bit) running on Ubuntu 22.04.

I need to filter some emails, and need to filter by the "reply to" email.

Reading elsewhere, I followed the instructions, and created a new custom tag to filter (and checked in the advanced part of the settings, and saw that under the mailnews.xxxx there was the "Reply-To" header set up.

I then set up a filter to use this new tag (sorry if my terminology is incorrect), and ran it on a mailbox, where I know there are emails with the Reply To email address is present, and not one of the emails was affected by the filter.

What am I doing wrong?

Many thanks for your help.