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I have been using Thunderbird for years. Always updated to the latest version. My current Thunderbird addresses are setup through Hostgator hosting and I've rarely had an issue. I recently set up a Zoho email address and added it to my Thunderbird platform so I can send and receive emails there. Problem is, when I send a test from one of my long time Thunderbird emails to the new email that goes through Zoho, it never shows up in my Thunderbird inbox. Never shows up in my Zoho inbox either. I can send from the new Zoho email to one of my established emails no problem using Thunderbird. But it doesn't work the other way around. I've checked everything I can think of--IMAP server settings, SMTP settings, added MX records, you name it. Not sure where the hang up is. Hopefully someone can help, thanks.

Thunderbird Version 115.10.1 on Windows 10

I wrote my own POP3 server and it largely seems to work apart from when Thunderbird tries to RETR the email messages at which point I get the error "Unable to write the email to the mailbox. Make sure the file system allows you write privileges, and you have enough disk space to copy the mailbox.".

If I drag a saved version of that same email that fails to be retrieved into Thunderbird , it can write it to the Inbox without issue. That means Thunderbird has permission to write to the Inbox file and so it is not a permission issue and there is enough space. I feel like it is more likely to be something I am doing wrong in my protocol implementation. For example, could I get this error if I misrepresented the octet count? Also I notice that even though my CAPA reply does not include UIDL, Thunderbird still seems to send that request and should get the response "-ERR Unknown command".

Output from my server showing what Thunderbird sent to it: CAPA USER person@mydomain.com PASS XXXXX STAT LIST UIDL RETR 1 QUIT

Any help is much appreciated, even if it is guidance on how I can debug it more thoroughly.

Thanks.

I am encountering a peculiar issue with the "Reply to All" functionality in Thunderbird, which I believe may be a bug or an unintended behavior within the application. I hope you can provide guidance or a solution.

Issue Description: When I attempt to "Reply to All" to an email that I previously sent (which is the last email in a conversation thread), Thunderbird automatically alters the sender's address. Specifically, instead of maintaining me as the sender, it changes the sender to the one (or the first one, if there's more) of the original recipients' addresses. As a result, the email appears as if it's being sent by the recipient back to themselves. This messes with the recipient's folders and rules, as the message has no indication it's been sent by me. This happens when I initiate the "Reply to All" action from the Sent folder on emails where I was the original sender. This only happens in one of the email accounts I'm using in Thunderbird, and it's a POP Mail Server type account.

Steps to Replicate:

Send an email to one or more recipients. Go to the Sent folder and open the email that was just sent. Click on "Reply to All." Notice that the sender's address is automatically changed to one of the recipients' (typically the first one, if there are more recipients). Expected Behavior: The sender's address should remain as my email address, not change to a recipient's address, ensuring the email is correctly identified as being sent by me to the other recipients.

Troubleshooting Steps Already Taken:

Verified that no extensions or add-ons are causing this behavior. Checked for any relevant settings within Thunderbird that could influence this behavior but found none. Updated Thunderbird to the latest version available. I would appreciate any advice, solutions, or workarounds you can offer to prevent Thunderbird from automatically changing the sender's address in this scenario. Please let me know if there are any logs or additional information I can provide to assist in resolving this issue.

Tbird is close to perfect for me, so I regularly support it. One thing I do have occasional problems with concerns searching and using tags I hope I am wrong, but when I search for one or several emails I usually find them, but still have no idea of where they are located. The same applies to the very handy tags which I also gratefully use. I filter mails to appr 30 folders and archive them yearly, so actually finding an email can take some time. The path to the folder is not necessary - just the name of the folder would be enough to pinpoint it

yt / Joran Ahlback

Collecting mail one day, I received a Thunderbird message 'compact now'. After the compact process, some mailboxes are missing. How do I re-instate these deleted mailboxes?

I think with the update to 125, I no longer see the typical Windows window controls in the upper right - minimize, maximize, close - so I don't know how to do those things.

THe top right looks like this Mac-based image (where those buttons are on the upper left) but I'm running on Windows so I don't have the dot buttons on top left nor the Windows style min/max/close at top right.

What do I need to do to get them back?

When send a calendar event to an Attendee list I get an email notification if they've accepted or declined but I cannot see the status in the actual event. I also cannot manually update the attendee status. I should be able to see attendee status in the event shouldn't I?

Using Thunderbird 115.10.1 on Ubuntu

I like to read, file, or delete my email when it arrives. Suddenly my inbox showed 18,642 unread emails! I've read them all, but I cannot figure out how to return my count to 0 without deleting each one individually. I don't know why this happened. Can anyone help me return my count to 0?

I am using Firefox v125.0.2. When I open a PDF in Firefox it takes a lot of time to load. But, when the same PDF opened in the Edge browser it loads normally and scrolling through PDF pages renders fast. I have shared the screenshot of a single-page pdf loading taking quite a long time.

Could someone please help me with this.

All of a sudden, over 6 months of my "deleted" items dropped off. I like to keep up to 9 months items for history reference if needed. Is this an automatic thing, or if, can it be adjusted by settings?

Starting with my bank's web site, my user name/password is being challenged. I can't bank. Elsewhere, where my desk top has always been recognized, I'm now forced to log in each time...and I receive an email that a new device has just logged into my account. All of this suspiciously coincides with a recent browser update. On my bank feedback it's showing as Firefox "125"...when all previous logins were recorded as Firefox "124". Help!

Hello people of Firefox,

I'm attempting to deploy Mozilla to our android devices using MDM but need to be able to use our organization's Certificates.

I know I can manually go into the secret menu and set it to use third party CAs and that works but when deploying to over 500 devices that's not feasible...

Is there any configuration keys I can access to be able to remotely configure the application to use third-party CAs? (These are normally referred to as key-value pair)

Thanks.

(TLDR; Questions in bold at the bottom)

I currently have just a desktop Mac. I recently switched from Apple Mail to Thunderbird to read three email accounts: iCloud, gmail & a university account. I had previously used rules at the server level on my iCloud account, and this caused hella pain during the migration, including some zombie rules that I think I have isolated to Thunderbird. I deleted the rules from iCloud, removed the iCloud account from Thunderbird, restarted and then re-added it to Thunderbird. So far, so good, although I had to resubscribe to the draft, junk and trash folders (all other than the inbox) for some reason.

I have decided to experiment with not using rules or folders at all, and instead use local saved searches in Thunderbird. This will make my life easier when I get a laptop, which is inevitable. Two machines reading the same IMAP emails with rules can get weird.

Can I copy/paste existing saved search folders, so I can do similar searches just by making minor changes to the search terms? If so, how?

Can I copy/paste or save saved search folders, so I can do the same searches on a different Mac, without painstakingly recreating all the search terms? If so, how?

Can I create a saved search folder that contains all the messages not found in any OTHER saved search folder? If so, how?

Until recently when a spam email was received, I could go to my Message Filters and one set up as DELETE. After entering the spam email address I could then select RUN NOW and the spam email would be deleted. When I click RUN NOW at present nothing happens. How can I get this filter to work again.