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I'm using the Thunderbird calendar (Lightning) on Pop!OS (Ubuntu) Linux. The calendar is synced with our NextCloud server's calendar. It's worked well for years, but today suddenly I got 48 reminders of a biweekly meeting and it won't let me dismiss the reminders or snooze them. I restarted Tbird, didn't help.

Windows 11 Thunderbird 137.0.1

ARRRGGGH! I've been using Thunderbird for over 20 years and it's doing something new and BAD:

Every time I open it since yesterday, it keeps adding additional inboxes (7), drafts boxes (3), sent boxes (2) and junk boxes (6) and trash boxes (2). I don't know how to get rid of all of the extra folders. My profile is backed up, I just tried deleting the program and installing the latest version and it opened the profile (I thought it'd open a default profile and then I could reinstall the "real" profile). What's happening and how can I fix it? No, this does not have anything to do with multiple email accounts and I haven't added any new ones. Please help!

Hi Folks,

I hope you can help me with my little problem.

Thunderbird was damaged during the migration to the new Mac, so I installed a new version of Thunderbird on the new Mac and now want to get the emails from my old Mac into the new Thunderbird. I think I know where the files for the new Thunderbird are: /Users//Library/Thunderbird/Profiles/xxxxxxx.default-release/imapMail/map.xxx.net, so is it as easy as replacing those files with the files in the equivalent folder on the old Mac?

Thanks for any help you can give me.

Cheers! Chris

I used to be able to download with no problems. I did not change any settings, but now I can’t download any emails from either of my accounts.

I have email with shaw.ca and telusplanet.net (now operating under gmail). Neither one will download

When I try to connect it gets hung up on: Host contacted, sending login information . . .

After a while it used to come back with a comment about login to server failed

I have tried under 3 difference wifi/ethernet networks I’ve tried under wifi as well as direct Ethernet connection I use Windows 10 and it is up to date Thunderbird is up to date I use the POP method I’ve tried using a smaller password I have changed from SSL/TLS to STARTTLS and back I’ve tried using different ports (995 and 110) I use AVG and have tried it with AVG options turned off I have AVG configured to allow in and out for Thunderbird I use Normal password as the authentication method

What else can I do?

Just what the subject line says. Go looking for something and Search doesn't find it. Even after I remember the email and find it, Search does not find it.

Why is this? It is un-usable, actually as it happens all the time.

For instance, putting in a company name like "walmart.com" will find some but not all the emails with walmart.com and certainly not the most recent ones specifically with a person's name.

So Thunderbird auto updated last Tuesday and although I was then sending emails as normal with no error codes and them still showing as sent - they weren't received. I spoke to Fasthost who said my messages were being registered as spam by my own server so deleted before they could be received to my recipients.

Had my DNS settings changed as recommended, I don't have any firewall activated and can send emails just fine through outlook online but not through thunderbird. Fasthost have checked all of the Thunderbird settings for me and they're all correct?

I've changed my passwords and logged back in.

I run the business on this email account and am now struggling so much because of it - please help!

I have been using Thunderbird for over 15 years without any problem. Two email addreses are managed by Thunderbird. My emails are classified in about 200 folders. I use Thunderbird on 3 computers and all my messages and folders are synchronized via Dropbox. Starting about 6 months ago, messages have started disappearing. Some new folders have started getting duplicated. For example, FolderXX was duplicated as FolderXX-1 with only recent meassages in FolderXX-1. Most recently, some folders have been emptied of all their messages with only the last message remaining. This message loss is a real problem. Could it be due to a recent problem with Thunderbird, or a problem with Dropbox, or an incompatibility between Thunderbird and Dropbox ? Thanks for any help Florent Domine

Opening a PDF from an attachment in TB (version 138.0, Build ID 20250423163813), scrolling to any page, and choosing to print "current page" always points to first page. I tried this from two totally different machines and accounts, one Win 10, another Win 11.

I am running Thunderbird under RedHat. If I start Thunderbird using a specified profile (e.g., -P a1), it is displayed and fully functional using the settings for that profile. If I want to auto-compose a message, an application trigger will start another instance of Thunderbird with the same profile (a1) and the "-compose <compose args>" argument. This also works fine; I can select an addressee in the newly-generated message window, hit 'Send', and sent message appears on the original Thunderbird Sent folder.

I need to run these within Docker containers. Scripts have been developed to support this and populate the container as needed. Thunderbird runs and functions normally within the container; messages are sent/received normally. However, when I try to launch another instance using the "-compose <args>" argument within the container, I get "Thunderbird is already running or not responding". If I do NOT have the first Thunderbird instance running, the "-compose" instance works normally; I can address and send the email. However, this forces me to close the main window everytime I want to auto-compose a message.

It almost feels like the two Thunderbird instances are not communicating within the Docker container. Would appreciate any help/suggestions/debugging approach.

Thunderbird version: 115.7.0 (I have no control over the version in use)

I have just started using [and donated to], Thunderbird on this newer PC. However, I cannot reply to emails, getting an error message stating that the sending failed because the SMTP server timed out. This happens even if I type just one letter as a reply and hit send. I have been using Thunderbird for a couple of years on my other recalcitrant PC, and have never had this problem. I have checked and all settings are exactly the same on both computers, same security programs, everything. Some internet articles say that it could be the security system, I disabled that, but the problem persists. What is going on? So naturally, if I need to reply to you, I will have to use the other computer, which randomly shuts down at inopportune times. Regards, Theo Beeltje.

Receiving login to server mail.kieselbark.com with username info@kieselbark.com failed. I’m not really sure what else to do here. I just purchased this business and I changed the password but can’t see login anymore. Please help.

I'm using Thunderbird (128.10.0esr) with an Office 365 environment. Normally I'd be using Outlook, but I'm trying to get TB to work so that I can use some of the plugins to help clean the mailbox up.

We use MFA on O365 but, the setup and access itself seems to of gone fine. The mailbox does have a large number of folders (very large).

The main problems I'm hitting is that :

1) Not all of the folders are getting subscribed to. If I refresh the list, I can see all the folders.. I can even select them (though thats a painful process in TB, even with Shift-select). But once I've selected them - not all of them actually get subscribed. I seem to of now gotten to a point where maybe 50% of them are subscribed, the others are not even though I've tried selecting them several times.

There's no error coming out from TB that I can see.. Sometimes it'll sit there and say it's opening a folder.. Other times it seems to say its doing nothing at all (the activity monitor shows nothing).

2) Some folders are subscribed to that I definitely don't want, and I can't seem to unsubscribe them. Eg "Calendar". If I deselect that Folder, the status bar tells me it's unsubscribing but then nothing happens. The folder doesn't disappear either. Inside that folder there's 100s of "Retrieval using the IMAP4 protocol failed for the following message".. that repeats and grows on each get-new-messages.

I can imagine its some incompatibility between O365 and TB.. but where would I find a log of what it's failing on.. How do I get it to stop polling folders it shouldn't ? That seems to be issues on the TB side of things.

Searching the forums here I find lots of threads similar but not with answers, and surprisingly not too many about O365.

A task has been finished in the gmail-calendar. The entry-stub in the Thunderbird tasklist remains and can't be closed or deleted. It always says "the entry was altered on the server and all changes on the server might be lost, when you proceed".

Til tider kan jeg ikke hente mails i Thunderbird. Jeg anvender heden5@c.dk via yuosee. Alt er opdateret og alle kontoindstillinger er korrekte. Alligevel sker der det, at i perioder modtager jeg ikke mails. Der kan gå en time eller to dage, så virker det pludseligt igen uden, at jeg har foretaget mig noget som helst eller computeren har været anvendt overhovedet. Det har nu stået på et års tid.

I went drafts to be saved in my servers 'drafts' folder and emails that I've sent going into my server's 'sent items' folder. They keep being saved in Local folders-drafts and Local folders - sent . I've tried to change that without success.

Taskbar icon shows incorrect number of email. Question: Anyone else having this issue? Any fix? Today the Sent - my email address taskbar button shows 98 In Thunderbird I have only 2 new sent messages from 4-18 and none for 4-19. I have 9550 overall.

My Inbox on various days show 75 or 14 or 8 BTW I never get more then a few messages at a time so seeing 75 or 14 or 8 would never be correct.

I go to download and none show up. I have the number of Total message count already downloaded displayed and the number does not change. Any new message would also be in Bold.

I disabled the showing on the Taskbar and as an example when I go to check messages and it says 1 of 1 yet none show up.

I have even moved all my Inbox email to a subfolder and no new email will show up in the Inbox when the program says I will have lots. I checked my domain cPanel email and no new email either.