Forum Thunderbird zajednice

Thunderbird hasn't saved any of my Microsoft Emails for days and now it won't send. My other accounts (Gmail, AOL, etc.) work fine, however. How do I make the fix so I can send and also sync my Sent emails so they show up! I just get long hold ups and error messages.

Filters *unreliably* sort the mail into their target files. I have reconstructed the filters from scratch twice, both times with identical, unpredictable results: each filter works properly on the inbox when tested, but each filter only works *sometimes* in the normal course of getting (IMAP) and sorting mail. When getting a batch of mail, some messages are sorted, while others are not. When testing the same filters on the same (still unsorted but already picked up) messages, those same messages are recognized and sorted correctly. The question is: Why are the filters not working reliably during message pickup?

The mail server is running "Debian stable" Dovecot. It seems to work well; I'm not *missing* any messages, but they're not always getting into the right folders. Instead, some messages, and sometimes quite a few messages, may remain in the inbox. I surmise that the problem is in Thunderbird, where somehow the downloading process somehow undermines the sorting process. A queuing issue? A communications-with-Dovecot issue? (The server is in Paris and I'm in North America, but there doesn't seem to be any undue latency that I can detect. The server is not very busy, that's for sure.)

In case it helps: I filter mostly on `DKIM-Signature`, `Authentication-Results`, and `Received` header entries. In a couple of cases, I use `Body`. I'm almost always using "match any" (as opposed to "match all").

Hi there! I and my colleague encounter some bugs with Thunderbird and we would like to seek your advice in regards of the issue.

1. <user a@citizen-systems.com.hk> was supposed to get a cc copy of the email sent by <user b@citizen-systems.com.hk> at Mon, 12 Jan 2026 09:35:19 +0800 but it never reached. The receivers, namely <user c@systems.citizen.co.jp> and <user d@citizen-systems.com.hk>, however, were able to get the mail. <user d@citizen-systems.com.hk> and <user a@citizen-systems.com.hk> are working at the same office and under the same network. Network provider checked the protocol, router, traffic and firewall are working as normal.

2. <user e@citizen-systems.com.hk> found a number of emails that she kept at "Inbox" disappeared on 12 Jan 2026 morning +0800.

She is unable to find it anywhere at her whole mailbox but has to ask the senders to resend them to her.

It would be very much appreciated if you can check and advise how to prevent the issue from happening again.

(PII redacted by moderator)

I have a windows 11 pc with thunderbird 147 installed. It worked until Jan 16th, 2026. I added the account to my Linux pc that has thunderbird 140.5 ESR inststalled and it works fine with the account from the windows 11 pc.

We have Thunderbird installed on 2 computers and, for the last 3 days, we have been to receive, but not send email. We can log in to our email provider online and send from there with no problem, so it's strictly a Thunderbird issue. We use Graceba/WoW for our email/internet, windows firewall, PC Matic AntiVirus, Windows 11, and Thunderbird version 147.0 (this information is the same for both computers). When we try to send an email with Thunderbird, the following error message pops up: "Sending of the message failed. The message could not be sent because connecting to Outgoing server (SMTP) smtp.graceba.net failed. The server may be unavailable or is refusing SMTP connections. Please verify that your Outgoing server (SMTP) settings are correct and try again." Our outgoing server settings are correct; nothing has changed and no updates have been done. Something happened over the course of a day 3 days ago (it was fine in the morning and not fine in the afternoon) that caused us to not be able to send email. Please help!

I transferred to a new Apple Mac Book Pro in Nov 2025. Downloaded and Installed thunderbird version 144.0.01. No problems. Did updates and started to encounter issue with sending mail. Last updated version was 147.0. Had to go back to version 144 to get a properly working Thunderbird.

Is there a bug with version 147 for Apple Mac Sequoia that means you cannot send more than one email at a time from pop3 accounts? I send an email, and then have to quit Thunderbird and re-open if I want to send another email. I have done a lot of testing and checking over the last few weeks to try and get Thunderbird to work properly, but nothing worked. Plus a date edit bug / feature for tasks?

I have several accounts, all pop3 apart from 1 Gmail account. No matter which account I start from, if I want to send subsequent emails from a pop3 account, I have to quite Thunderbird. No matter how long I wait to send the email. I tried saving the email as draft, and send later. Does not work. I did not make a note, but I think in my testing I may have been able to send more than one GMAIL email - it is IMAP. I know I did send 1 email from my gmail account, and then tried one of the pop3, but was not successful. At all times fetching mail has not been a problem.

I did all the standard checks which did not make any difference: the server settings; addons disabled; virus checker disabled. Removed an account and re-added; deleted SMTP server settings and re-added. Proxy settings; and so on.

On my old mac running version 128.14 no problems at all. I compared settings. Could not see any differences.

On the new mac, created a new user, and new thunderbird profile. Added 1 pop3 account only. The problem was exactly the same. So it was not a profile issue.

Decided to revert back to older version 144. PLEASE could Mozilla add a facility to Thunderbird to allow you to use existing profile rather than going through the operating system to get it to use my existing profile. I did get the old 144 version to use my 147 profile. After testing yesterday and today it all appears ok. I can send more than email at a time both from the same account, and from different accounts. What I do notice is it does seem to be slow on making the connection on some accounts. Most of the accounts are from the same host but the connection speed for sending is variable across the accounts from the same provider. My email is purely the words testing and testing in the body so not large. Is that to do with the space I have assigned to email mailbox at the provider side?

One other issue with 147, and do not know if it is connected or a new feature of 147 and that is not being able to directly amend dates in tasks? In the newer versions of Thunderbird I found that I can only amend the date of a task by using a popup calendar and choose the date. In version 144 I can now amend the date of tasks by typing in the date field. Is it a feature / setting of 147 or a bug?

My question / subject tells most of the problem. Here it is again in slightly more detail: SPF fail is the part of the undeliverable response to two different emails sent yesterday. What to do? Is down to me or ISP? Is this a Thunderbird problem, or a server level issue? If it is Thunderbird, what action do you suggest?

Hello, I am using TB 140.7.0esr. I have five email accounts in TB and all send emails but one. This one email receives IMAP emails, but will not send. All emails accounts are hosted on Godaddy Office 365. The one I am having issues keeps popping up the dialog box to enter password when sending. When I click on the button to add a new passoword, TB just tries sending again. It never shows the popup to enter the new password. I have deleted this account and installed new, still same issue, only on this one email acount.

Thank you, JR

I've recently installed Thunderbird and configured it to connect to a few of the email accounts I've setup. For gmail servers, everything seems to work fine. For a locally run hMailServer server, I can connect, download messages, and even send messages - sort of.

When I try to send an email through the hMailServer account, the message sends correctly: it arrives at the other address quite quickly, and I can see in the server's logs where it connected via SMTP, transmitted the message, received a "250 Queued" response, sent QUIT to log off, and got the "221 goodbye". However the Thunderbird UI itself never progresses past the Sending Message dialog: the status stays at Sending message... and the progress bar is full. I can hit cancel and it prompts to delete the draft, etc., but either way, the message has been successfully sent. This doesn't happen with other accounts, so I'm curious what I need to do to get this to go away or send correctly....

I'm using Thunderbird 147.

I have the same original problem as https://support.mozilla.org/en-US/questions/1508740 , and from the same time period, but across 4 of 5 email addresses, with additional problems. All given answers then & now on this website have completely failed me.

I have 4 emails on the same server, which use IMAP, so there is no way for me to adjust any msg retrieval settings, because they don't exist. Surprisingly, one of these 4 emails actually does work in sending & receiving, but I got different error with it, just now! I also have one gmail affected by this original 2 year old problem, as well.

Closing program, restarting computer, and downloading TB updates all do not work. I uninstalled/reinstalled TB, and all of my profiles & emails were surprisingly intact with no deletes (yes, I backed them up in another folder first), and the problem persists upon reinstall of TB, on the exact same emails as the original problem. Antivirus & firewalls are off. Server said it wasn't them. I'm using Windows 11, McAfee antivirus, and the newest TB dld is Eclipse.

There is no distinct alphanumeric error message for the oldest problem, just the usual "Login to server with username failed. Retry/Enter New Password/Cancel." All passwords are correct. None of my passwords are "saved" in the TB program, and I'm having trouble locating where to tell it to do otherwise.

Screencap and copy/paste attempts to grab second error message failed, but it looked like "RETR failed, one message expunged." So far, it's a one-time error, which I can live with. All emails for that ONE working email are fine.

When I attempt to sign into Google, it takes me to a troubleshooting page https://support.google.com/accounts/answer/32050?hl=en asking me to clear cache & cookies, if I'm using Chrome (which I'm not), instead of just a login to retrieve my gmail.

My emails have been sitting on the servers for 2 YEARS and I am at my wits' end - please help!!!

I just started having a issue where it will be for example noon , and I just get a email , that is not on top but down the list and it says 9am , or similar times where it is 1 or more hours later from the time on the email , but it just showed up , but its down on the list of recent emails , so for example I check emails and a few come in or I get a notice that I have a new email

I have Thunderbird minimized in the taskbar , I never close it , and it will show a email from a few hours ago that just came in , but its below emails that I have already read that were after that time , so basically its like some emails just randomly appear that didn't get delivered when they were supposed to along with the others at that time , this is not a 1 time thing , this has happend several times over the last few days

I can't find any Setting that allows me to choose Newest Emails on Top , or to check the Time to see if it thinks its a different time of day than it is when delivering , or to bring in emails in order of delivery time , newest first and so on , so if a email has a Delivery time of 9:38 am I actually recieve it at 9:38 am , for example I got a email showing the time at 12:48 PM as delivered (10 minutes ago , but I just got the email now at 12:58 am) , then I got one time stamped at 11:15am , and 11:13 am , and at 9:38 am , , the 9:38 am email came AFTER I got the 11:15 email by about 30 minutes , and the one I just now got (it was 12:58pm when I got it , but it shows a time of 12:48 pm so 10 minutes difference from the time it shows delivered to the time I actually got it) , this is while my email is open and I am looking at emails ..... Email Version .. 147.0 ..

Any Ideas ??? .... Thanks .... Jim

'unique identifier' error and Inbox thinks it a draft folder. But only on one account. Messages to one of my mailboxes says it's coming from another of my email accounts, not the sender. If I right click the message in the Inbox I get an Edit Draft drop down. If I select 'open in another window' the From is correct in the new window. If I open an email in the Inbox the From shows coming from one my accounts. Started yesterday and I tried various ideas from faq's. Thanks!

I'm using Thunderbird 140.6.0esr (aarch64) on a 2024 14" MacBok Pro running MacOS 15.7.3 (24G419).

I manage fourteen email addresses, with most of the traffic going to one primary account, either by direct addressing or forwarders from others of the addresses. Maybe not the most efficient setup, but it means I don't have to scan 14 different inboxes to find the messages I most need.

I currently use ±89 filters on this primary account to file messages in a LOT of mailserver-based folders, and a few folders on the laptop. ±90% of the traffic gets filed in server-based folders so I can use any device to access message history. (I should probably note that these filters and message-threading don't always play nice together.)

For a long time, one of the message filters I'll call "Filter BS" successfully filed specific messages in "Folder BS," a server-based folder 2 levels below the inbox. Folder BS also has 2 levels of sub-folders within it for annual and monthly filing.

Some time ago, I began to have problems with messages of many kinds (subjects/sources/etc.) going missing. Eventually, I searched and found them in Folder BS. In response, I deleted Filter BS, looked for but didn't find other filters responsible for these unexpected results, and managed incoming BS-related messages manually. But despite Filter BS having been deleted, non-BS-related messages still get "lost," meaning incorrectly filed in Folder BS, which is acting like a rogue black hole, sucking up everything that gets too close. I have not been able to identify any criteria for what turns up in Folder BS beyond "lots of stuff that doesn't in any way belong there."

Speculating that something's "off" with the BS folder's directory in a way that would be nearly impossible to fix, I'm trying to figure out the least inconvenient, least risky way to solve the problem.

Not knowing other ways I might compound the problem by making big moves with the MANY messages archived in the BS folder's 7 annual subfolders and their 12 each subfolders; and not knowing how to back up server-based in-box sub-folders, I'm stuck at an impasse.

How should I proceed?

Thanks in advance for any input.

Why are older emails disappearing from the Inbox? It didn't do this when I was using Windows 7SP1. Now I have Windows 11 and it seems the Oct and Nov emails I had have disappeared. Only Dec emails are in the Inbox.