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I'm long time user of Thunderbird Calendar. For most of the events in calendar I have reminders that should pop up for example 7 days before the event. This was working correctly.

About half year ago. The reminders stopped working. I don't get the reminder 7 days before, but they pop up on the day of the event. This is quite unpleasant. For example If I have my car technical check deadline and I get the reminder on the deadline, not 7 days ahead.

I have not changed any settings around the time it started happening.

So far I have checked: -Individual event reminder settings : yes they still got the reminder set up to pop up some days before the event -Settings / Calendar / Reminders / Show the reminder dialog - checked -Settings / Calendar / Notification / Show notifications for upcoming events - I added here "1 day before event starts" notification, but that also doesn't work. -Tried Googling the issue. Found some threads about reminders not popping at all. Not the case here. I don't get notifications before the event, but they pop up at the time of the event. No luck here.

Since about half a year has passed since this started, I guess it's not a bug that happens to everyone.

Hi,

First of all thanks for Thunderbird!

I used to use the "Open message in conversation" function from the context menu extensively. It showed all the emails in a conversation across all folders. It's not there any more though.

I've found an option to 'Toggle message threads' but this only shows a thread in the folder i'm already in, not across the whole thread/conversation in all folders.

I've found this https://support.mozilla.org/en-US/questions/1555101 but it doesn't fix the problem.

Please help!!

Thanks

Hi all, My Thunderbird settings are suddenly being ignored. First the order of the emails was altered to ascending instead of descending then the adaptive Junk setting stopped working so that although the correct emails are marked as junk they are left in my in box and I have to manually move them. I have checked that the settings are still as I chose but they are being ignored.

to test my new proton.com email service I sent a message from my proton.com account to my gmail.com email box, the message is not displayed in my gmail inbox. The reverse operation works (from gmail.com to proton.com inbox). Why?

Menu: Message>attachment>delete all

When delete all attachments for a message, when delete all attachments, auto move to the next message.

This behavior is annoying, usually I first delete all attachments and then reply but message position is in the next message.

This behavior is for example for version 140.7.1esr and 140.8.1esr.

102.15.1 work fine.

I have Version 140.8.0esr | Released February 24, 2026, for Linux Mint (up to date)

I have a CardDAV address book on a Nextcloud instance that i want to sync to Thunderbird.

When i open Address Book and the clikc on " Create a new address book" the Account Hub modal window opens. None of the 4 options (including Add Remote Address Book" do anything, i.e. I can click as much as I like but nothing happens.