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In the last 24 hours all messages in the "Inbox" (new and old) no longer have a "From" email address and default to my email address, at the bottom of the screen is the following message "A unique identity matching the From address was not found. The message will be sent using the current From field and settings from identity Marcus Relton <my email address>". These emails once opened continue to be "unread", the option to typical options of a new email such as; delete are not available and they appear as if drafts. This is only occurring in the "Inbox", if mail is moved to another folder within the server folders or local folders the email appears and functions are normal. I read the following thread https://support.mozilla.org/en-US/questions/1457302, which only references updating the Inbox Flag Properties, however I do not have this option. See images of emails and properties for reference. (I have redacted my email address)

OS is Windows 11 Thunderbird is up to date as well. I have made no changes in the last 24 hours with the exception of adding a new "Tag" for email identification.

I would appreciate any help. Thanks Kristen P

Why is it that sometimes I cannot use edit > paste as quotation. Sometimes I can then simply paste the text but sometimes not. I can't paste at all, that is. If I can't paste at all, but I paste into Notepad, then I can copy that plain text into TBird and it shows up. Different format but I don't really care about that.

This has been going on for years thru many TBird versions. And I cannot see any pattern in when pasting or pasting-as-quotation fails. It seems completely random.

Is there anything I can do to fix the problem? or better troubleshoot?

Thanks, Jeanne (Windows 11, TBird ver. 128.7.1esr (32-bit))

So, all of a sudden my incoming emails went directly to the "Junk" folder for no apparent reason. When I go to the Junk folder to view my emails, they don't show up in the right viewing column.

And when I try to send them back to my "Inbox," they don't go there and I have no idea where they go. I can't see them anywhere. I've checked my outgoing settings and they're where they are supposed to be....as well as my incoming server settings. They are where they should be. I use Comcast, and have checked with them, and those settings are correct

So at this point I have no idea what to do, and obviously need help from someone much more knowledgeable then me! Hopefully I've explained the issue clearly, and have made it easier for those of you out there. I'm not a computer dummy....but this has be quite baffled, as it came on suddenly, and had weird characteristics.

Thanks to all,

Michael...

I'm trying to create an event that start from time in PST, and end in China Standard Time. However, the date time selector doesn't seems to be aware with the timezone I selected and still prompt that I selecting wrong time.

I'm on the latest stable Thunderbird release, 138

Hello everybody I'm using Thunderbird version 115.10.1 (64-Bit) German. This question appeared some years ago. Now I'm still confronted with the same question. When I reply to messages or I'm up to forward a message, my signature is not inserted. I used TB for a very long time and I used this feature in the past extensively. I think, this must be an issue to TB .

I am running TB 128.5.2esr on a new Macbook pro. I've recently been forced off POP into IMAP using OAUTH by google which now requires IMAP only with Google workspace emails. I have a somewhat detailed folder structure for all my incoming mail that benefits from TB filters.

At first I tried reconstructing this folder structure on the IMAP server, but it was a nightmare and did not work correctly.

I have finally found a solution where I filter all incoming email onto a local folder set. However am now finding that the bodies of the filtered emails are coming blank 50% of the time - most likely because the filter is executing faster than the IMAP will load the whole message.

Is there a way to delay the filter execution on the IMAP inbox so that when the filter executes it will copy the message headers AND the body reliably?

In case someone is wondering: this is not a network or connection issue. I am running on hardwired connection on fiber network, and the messages that make it or don't make it are randomly sized (small ones fail while big ones don't and vice versa).

Setting aside the POP vs. IMAP discussions, I will say that I miss POP because it allowed me to "catch" all my email in the gmail server, while using it as I saw fit on my TB/local computer. Now I'm required to mirror both - which is not helpful to me.

Thank you for any help.

Pressing Get Mail icon displays some 8 messages in bottom ((.)) line of Thunderbird including <provider URL>:Connected to <account email address> and finally Checking mail server capabilities. Up to 4/1/2025 that got all the new emails of the account but since then no emails get into Thunderbird in any of the account's folders.

I've received a couple of emails where in the email list they have text/plain et al where the sender's email address would normally be, and in the email window it says text/plain, charset=UTF-8. Can Thunderbird not handle UTF-8 in emails, or is it just in that part of the email?

I have replaced Windows 10 on my laptop with Linux Mint 22 Cinnamon. I installed Thunderbird and, with a little diificulty with passwords, have my gmail accounts working. However I have a freenetname email address which appears to be installed. However when I seek to use it I am asked for a password. I enter the password that I use on my desktop for the same account but it is not recognised. I looked at the saved passwords (on my laptop) in Settings. None are displayed for the freenetname account and I can't see how to install passwords here to, perhaps, solve the problem. Some help would be very welcome. Thank you

I previously wrote to the forum regrading an email "Junk" issue, and the question or problem was not answered. After much trial and tribulation, I have my email back.....however it does not work properly as it did before. And now, everything that comes through is already marked as "Junk." And I have to click the yellow ribbon to mark it as not junk. I'm not sure what I might've done, nevertheless, all I have is email automatically marked as junk. How do I fix this? I'd love to have my email back to functioning as it did in the beginning, but it seems the more I mess with it, the worse it gets. Help please anyone!

Michael....

In reply messages, Thunderbird (macos 128.10) adds an indent to the subject line in the pane view. When the thread is very long the subject disappears because of the successive indents. Is there a way to remove these indents by default? Thanks in advance. Gérald

Hi,

Someone sends me a calendar appointment for 11th of May at 16:30-18:30 and another at 18:30:20:30. I accept these appointments. In my calendar, they correctly display at these times.

When I close and re-open Thunderbird, the first appointment is now scheduled for 12th of May, but the second is fine. When I close and re-open Thunderbird again, the second appointment is now scheduled for 12th of May as well.

The times are completely different too.

I'm using Thunderbird 138 from the Arch Linux repositories but I've also tried the Flatpak package to no avail. I've tried setting my Timezone manually and using my System timezone to no avail.

GNOME Calendar, which is also synced to my Caldav server, displays the appointments at the correct day and time. The web interface for my mail server also displays correctly.

It's only Thunderbird that screws it up time and time again.

This has been going on for years and it is driving me insane. I can't use my calendar with Thunderbird because I keep thinking my appointments are at the wrong time!

Send help.

I want to save a PDF from Thunderbird under a slightly different name from what is already existing within the directory. This would save me from repeatedly typing filenames.

For example my directory already contains "version1.pdf". I want to save an attached file as "version2.pdf". To do this I first search for "version" and highlight the file. Then I want to just change the 1 to a 2.

But the moment I highlight "version1.pdf" in the file list, the REPLACE button is greyed out. Is this intended behaviour?

TB 128.9.1esr, Ubuntu 25.04

Some months ago, my email account with Cox.net (pop.east.cox.net) was transferred to Yahoo (imap.mail.yahoo.com). I was able to keep my existing email address ([email]@cox.net) but in the process, all my pop email at Cox disappeared from Thunderbird. I haven't had time to address this till now.

I have located all the "lost" email under the Thunderbird folder in the C:/Users subfolder. All the mail can be found under C:\Users\Dinger PC\AppData\Roaming\Thunderbird\Profiles\ditb93lv.default\Mail. All the mail is in a subfolder called pop.east.cox.net and is either individual files (.msf) or located in separate folders with .sbd extension.

I tried moving the .sbd folders over to the currently active imap.mail.yahoo.com but after restarting Thunderbird several times, they still don't show up. Maybe because they are not on the yahoo server but just on my computer.

There has to be a way to recover these emails and get them into Thunderbird. Can you help?

I'm unable to send any email with Thunderbird on my new Windows 11 laptop. I've used Thunderbird for years and years on the old Windows 10 one, but it won't send anything with the new one. The version info it gives is "128.5.1esr (64-bit)". Whenever I try to send an email message, it waits a long long time and then gives a popup saying "Login to server smtp.mail.yahoo.com with username [email removed]@verizon.net failed." It gives me an option to enter a new password, and if I click there it doesn't let me enter the password again, just re-tries, again waits a long long time, then gives the same error popup. When I cancel, it gives a new popup saying to check the password and verify the 'Authentication method' in Account Settings. Authentication method looks fine, but the password (Settings->Saved Passwords) is empty (?? But I entered the password when I started Thunderbird and asked it to save it).

I'm having trouble with Thunderbird on my new Windows 11 laptop. I've used Thunderbird for years and years on the old Windows 10 one, but can't get it to work right on the new one. The version info it gives is "128.4.4esr (64-bit)"

Specifically two problems. (1) Every time it starts it asks for my yahoo server's password. Even though I check the box asking it to remember it, it doesn't. Under Settings->Privacy&Security (under Passwords)->Saved Passwords, the list is empty. (2) Second problem (may be same as first, but in a different form) Whenever I try to send an email message, it fails. It waits a long long time and then gives a popup saying "Login to server smtp.mail.yahoo.com with username [email removed]@verizon.net failed." It gives me an option to enter a new password, and if I click there it doesn't let me enter the password again, just re-tries, again waits a long long time, then gives the same error popup. When I cancel, it gives a new popup saying to check the password and verify the 'Authentication method' in Account Settings (which I have done, and all looks OK).

Thanks Bill Marshall, [email removed]@verizon.net

When setting up Thunderbird, I did not see the radio tick box for removing mail from the server. What will happen now that I have removed about 10000 pieces of email from my local account on my computer's hard drive?

I have more questions, but would rather ask one at a time.