Thunderbird Community Forum

I have my operating system, and Thunderbird, set to the America/Vancouver time zone. When Pacific Daylight Time fell back to Pacific Standard Time on 1 November 2026, changing from UTC-7 to UTC-8 hours, our time zone remained unchanged at UTC-7 hours.

Now I observe that the Date column of Thunderbird's Message List display shows the date and time of each message converted into UTC-8. But the message date as displayed in the right part of the header in the message pane is displayed in UTC-7.

For instance, a message with the header `Date: Wed, 04 Nov 2026 09:27:27 +0000` shows in the Date column as "01:27" (today, 4 Nov), but the message date in the right part of the message pane reads "02:27".

I cannot find a control or documentation which governs the time zone used by either the Date column or the message date in the right part of the message pane.

How can I set to time zone used in the Date column of the Message List to use the America/Vancouver (or UTC-7) time zone of my operating system and of the Thunderbird calendar?

When I open thunderbird, the inbox say "No Messages". I then go to "File" and then "Get new messages for" account. Some times it takes several tries before all my messages (New and Old) appear in my inbox. Also, each time I open Thunderbird, I have to reset my columns.

I've been using Thunderbird for a good while now and love it. One thing that I find very frustrating though - it doesn't auto capitalize, such as A and I (one word). Is there any way to make it do this? Thanks

Bonjour,

Depuis plusieurs semaines, je ne peux plus du tout joindre de pièce à mes mails.

Pourriez-vous m'aider à résoudre ce problème, svp ?

je vous en remercie par avance.

Bien cordialement

Bonjour très interressé pour sauter de google a mozilla existe il Thunderbird agenda tache comme sur windows existe il l equivalent sur android sinon est ce prévu et pour quand? Bonne journee

I have a number of pop3 accounts with the same mail host, but suddenly one of them gives me the message "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."

I use Thunderbird on two Windows machines, and the problem is on both, so it is something in the interaction with the server, however, there is no problem accessing the mail via webmail directly on the server.

I have tried to change password on the account, but the problem did not go away. In fact, I got the box to tell me that the old password did no longer work, so I know that the problem pops up after log in to the account. Before the error message appears, the message "downloading 208 messages" (or something similar) briefly appears.

Is there a way to find out exactly what fails?

I'm not sure if this is a right place to ask, but since calendars are on Thunderbird page I guess it is. I downloaded a calendar from https://www.thunderbird.net/uk/calendar/holidays/ for Ukraine (direct link -- https://www.thunderbird.net/media/caldata/autogen/UkraineHolidays.ics) and it doesn't contain any holiday. I did that from my Nextcloud server and directly from browser -- both times result is the same.

Hi everyone, I’m looking for a reliable method to convert multiple MBOX files to PDF format with attachments preserved. I have several email archives, and manually opening and saving each email as a PDF would take too much time. I also want to retain important email details, such as sender, recipient, subject, date, and attachments.

While searching online for the best MBOX to PDF converter in 2026, I came across Aryson MBOX to PDF Converter Tool. It appears to support bulk conversion and attachment handling. Has anyone here used Aryson for this purpose? How was your experience with the conversion quality, attachment preservation, and overall performance? I’d appreciate genuine feedback or suggestions for other reliable methods

Hi community,

I want to have the same font and font-size in:

• my HTML message body text
• my signature.html file

so I can send consistent and nice-looking e-mails, like you would expect.

Here are my current settings:

• Settings > General > Language & Fonts > Fonts >
  • Default font: Arial
  • Size: 12
  • Advanced: For both "Latin" and "Other Writing Systems" I have the settings you can see in the attached screenshots.

I heard that these settings are for personal viewing.

• Settings > Composition > HTML Style >
  • Font: Arial
  • Size: Medium

I heard that these settings are for viewing by recipients.

The first line of my signature.html file looks like this: div style="font-family: 'Arial'; color: #222; line-height: 1.0; font-size: 14px;"

There is always a slight font size mismatch of the message text with my signature.

I unsuccesfully tried tweaking the html font size values in px or pt to match the given size in Settings > Composition > HTML Style for Medium or Large.

It seems that the available font size granularity of Medium or Large just does not match corresponding pixel or point values?

I would be extremely grateful if someone can guide me on how to achieve this!

If there is no valid solution for this problem, I'm happy to open/report an issue on this.

Thank you and have a wonderful day

Using Outlook - this morning received the following email: I just clicked on it to copy to send to you and it disappeared. It was a thank you for applying to a job. I did not do so. I am not sure what this is all about. The dark web has my email address?? Appreciate any thoughts. Thanks.

I upgraded my Fedora nad I think that Thunderbird 149 came with that upgrade. I cannot send mails. Ctrl+enter has no reaction. Downgraded to 148 and everyhing is fine. |<

Hi I am an older person and have lost my profiles on thunderbird email - one is [redacted]@xtra.co.nz and the other is [redacted]@xtra.co.nz. We are in NZ and accidently deleted the Thunderbird profile and not the corrupted new profile I was setting up. Thank you. Gloria Sandbrook. I still have [redacted]@xtra.co.nz on my phone for communication. Cheers.

I cannot open the email program with Thunderbird, I have trie to open it by pressing Shift and Thunderbird Icaon, thus the Repair menu opens, I have tried every combination in that , like starting in the secured modus, but it did not help, I have tried to delete the "parent-lock" data in %appadat%\Thunderbird\Profiles\ - it said that I cannot delete it,because it is opened in Thunderbird. Would you kindly help me? Thank you very much

I have to find a new email carrier. 1) Is there a cost to Thunderbird email and is it the same as Thundermail? 2) Can I transfer my current email messages to be saved? 3) Can I use Thunderbird mail inside of Microsoft Outlook like is the case with my current email? 4) And current email is embedded inside of Gmail on my mobile phone. How would Thunderbird work on my phone?