Thunderbird Community Forum

Did I dream seeing an ad for a new system for sorting incoming emails to what I would call folders, but I think it had sections like Work, Home, Family etc.? Can't find anything on it. I would love to be able to park stuff in separate folders without me actually doing it!

I imported an appointment into the calendar. I wanted to setup a reminder. The only option is "Show an alert". Is it possible to to create a reminder option other than "Show and alert"?

I just upgraded from thunderbird 140 to 152 on Windows 11. I have master password setup.

Every times I start thunderbird, calendar keeps asking for authentication ( oauth ) , I did login successfully and was able to view and modify my events.

After a couple of startup I decided to click on the close button of the oauth authentication windows for calendar. I still able to see and modify my calendar successfully. Is it a bug or I miss something in the calendar settings  ?

Thanks

roland.multhaupt

18. Juni 2026, 07:13 GMT-6

Firebird is so slow now, that I can rarely receive the code that you send me. Have to take annother programm for that. Freezes even when trying to mark a mail or erasing it. WIN 11. The programm is working well at my wifes laptop also WIN 11. 2 month ago it worked fast and fine. Working in Troubleshooting mode does not show any spam ordner like before and it does not run better. I also downloaded the last version. No change! I would like to uninstall the programm but did not dare due to perhaps loose all my mails. Could you help me please? Thank you!

When I try to access my e-mails I am getting message." Login to server pop.tiscali.co.uk with username [redacted]@tiscali.co.uk failed." Nothing I do helps

Someone suggested BetterBird would be better for me than Thunderbird, but I'm not sure it was the right decision. They said I should be able to just open Thunderbird and it should work as they have the same base code, but it doesn't. Any ideas? I have 8 email accounts, so I'd hate to start from scratch.

Dzień dobry Mam taki problem, W programie Thunderbird mam skonfigurowane dwa konta obydwa na ....o2.pl Na jednym koncie co jakiś czas w folderze "Odebrane" znikają wszystkie wiadomości i po jakimś czasie pobierają się o nowa wszystkie nagłówki (co oczywiście trochę trwa) ale problem jest w tym że znikają mi zaznaczone etykiety. To bardzo utrudnia mi pracę z tym programem. Na tym drugim komcie nic takiego nie występuje. Sprawdzałem w konfiguracji serwera oba IMAP wszystko tak samo także w synchronizacji i pozostałe ustawienia takie same. Może ktoś pomoże ja w tych tematach jestem mocno w tyle :) Za pomoc z góry dziękuję Marek

Greetings all!

Thunderbird version is 1.52.0

Since this morning (8:00 CET) I have to enter password for my google calendar every time I start Thunderbird. No matter what authentication options I choose, calendar manager keeps asking me to authenticate. "Don't ask again" is turned on. Gmail is set up as OAuth for both incoming and outgoing servers, and it works fine.

Things I've tried since:

- Removed legacy connection in password manager, when I was using IMAP to connect to Gmail - Revoked OAuth permission from google account for Calendar and from Thunderbird password manager - Unsubscribed from calendars and added them again after restarting Thunderbird

I don't know what more to do. Also, I don't know what happened, really, as it worked properly last night.

I don't know what to do when February 29 is in my calendar, 2026 is not a leap year. I've found nothing to help me. I have the latest version if Thunderbird. Thanks

I am getting a lot of email dated a month of more in the future. How do I best filter these out as junk? I tried making a regular filter, but can't find a way to set it to "greater than today."

Within the last 6 weeks I migrated to Win11. I migrated my apps that would work and Thunderbird also. Got a recent update of TB. Finally MOSTLY disabled the bloody awful thread thing in TB (seems to be folder specific??!).

But ever since running on Win 11, I cannot stop TB from marking my messages as read even if I have never opened them. Even If I never use another device to connect with email. I try things and sometimes it works for like a day and then poof! : any email that comes in is read as per TB.

It is killing me. I run my biz on email and if it is unread I give it low priority. But turns out it is marked read without any action from me. I get a LOT of emails.

Really! I do no want to migrate to another email program.

I am fluent with regedit and can hack a .ini file. Point me in the right direction please.

help!

Good morning, for some time now, appointments on the calendar that were scheduled before I open Thunderbird have been “forgotten” and don't appear. For example: an appointment (or memo) at 8:00 a.m.; I open Thunderbird at 9:00 a.m., and the appointment doesn't show up. Thank you.

receives no email. sends no email. my server received many emails since then. everything else seems to work. it is not my server as I have Outlook, which received the emails. Only thunderbird is locked-up.

Some bubble-headed bimbo wiped out the columns inside folders, and deleted the headers - which deleted Thunderbird's ability to choose sorting by date or contact. This f'd it up so BADLY, that I find it USELESS now. I'm going to have to find some other email program.

A 2nd way it was f'd up, is it now seems incapable of importing an existing archive of emails. I tried to do that, and it WIPED OUT the entire archive of "local folders", to create a brand new Local Folder lacking any contents at all. The old stash was DELETED. In the past, I've been able to use this feature of Local Folders, to use the same archive of email between several different OS installations of Thunderbird. Those glory days are gone, thanks to some genius. It seems to have lost the ability to do that.

Really, all this makes me sorry I contributed to Thunderbird, this year. What a waste.

I didn't select to be emailed when somebody answers, because without the sorting I won't be able to notice it happened.

The system was working fine. The next day, when starting Thunderbird (TB, the status line shows logging in to server but loops; no errors or messages, Thunderbird is 'locked out' spinning. I see the normal INBOX page, but logging in never completes. NO CHANGES were made to TB accounts or settings. I have re-installed TB, re-booted, but no change. I cannot check/change any of the accounts or do any further 'debugging' because TB is spinning. The server login is fine because Webmail can be used. Internet connection is fine, because browser works. 1. How can I stop TB from trying to login at start up? 2. What could/would cause this behaviour?

Any suggestions much appreciated.

Hi,

we developed an add-in for MS Outlook. The add-in, connects to a mail message, and reads information from the mail - to transfer information to a special journal system.

Is it possible via API to Thunderbird, to create Add-Ins as seen from MS Outlook?

Best regards, Michael Vad

For the last two weeks I have noticed a marked decrease in the number of emails I am receiving. This is on my X@scratchmitt.com account email provider Gandi. I have attempted to contact Gandi but no response as yet. Is it possible the fault lies within my Thunderbird settings or installation?

(PII redacted by moderator)