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I exported my profile to an external drive, then reset my Windows 11 PC. The resulting file is a zip file. When I import, the import starts, then stalls and gives an error. The error log is incomprehensible to me. How can I not lose my local folders and messages? I tried unzipping and importing that folder, but another error. I need help! Ideas? Thanks.

Image of the error attached.

Hi,

I've created a backup file from Outlook which is 17GB with my old emails. I can't find an easy way to import this pst to Thunderbird 137.0.2.

When I go for the optio "Import from Outlook": a) I instantly get an error that a trojan virus is somewhere in my PC and b) it stucks to 33% forever and after a while Thunderbird crashes.

Is there any workaround? Thank you Ev

I associated all Win 11 extensions to Thunderbird Daily (139.0a1 (2025-04-27) (64-bit)) on Win11 Pro . Then I opened a link in email which connects to a website , that downloads the .ics file in FireFox Desktop which I open and that switches back to Thund. Daily to install the Calendar event but it stalls on Step 3 of 3 at 0%. Yet it may show up in the calendar after clicking the Refresh icon. Then visa versa sometimes it confirms the entry 100% and after a refresh icon it does not show it up as a duplicate entry. ( Which would be a nice to have)

Since I had 2 such emails and links to different .ics events, I tried various sequences to cause failure or success., with inconsistent results.

Install with "Daily" open or closed. Install same .ics file from downloads in sequence. Install alternate .ics file from Downloads.

I have been able to get both .ics files installed in the same main calendar but I am trying to find the pattern when it consistently works or fails. (without much success)

If I open #1 .ics file , the Import 3 steps succeeds and is finished but does not add a duplicate entry ( good) When I then open #2 .ics file with the event already stored in the calendar, now I get an error message

Status Code: 2,147,500,037, null

Server Replied with 409 If you're seeing this message after snoozing or dismissing a reminder and this is for a calendar you do not want to add or edit events for, you can mark this calendar as read-only to avoid such experience in future. To do so, get to the calendar properties by right-clicking on this calendar in the list in the calendar or task view.

It seems when I chose alternate .ics file imports it fails on#2 . But there were times when I could import from the file menu and get duplicate entries on both .ics files.

My Calendar is NOT set for Read only or Client side control as I also use iOS mobile Thunderbird and iCal.

sending of this message failed The message could not be sent because connecting to Outgoing server SMTP failed. This server may be unavailable or is refusing SMTP connections. Please verify that your Out going server settings are correct and try again

I have deleted the two accounts and added them back, restarted thunderbird but still be the same message. I'm sure this has happened since i updated the thunderbird version

Hi,

I'm on a fresh Windows and the CPU usage is waaaaay too big. When TB is out of focus, it uses about 10% of my CPU. This can go up to 15% when the window is active. It's not doing anything, not downloading or compacting or anything.

Thanks !

I have connected Thunderbird with my Zoho Mail account. Receiving and reading mails works flawless. But I cant send mails and gets an connection time out message.

I have followed the steps ind this guide: https://www.zoho.com/mail/help/thunderbird-imap-access.html

Can anyone help me?

Best, Niels