Thunderbird Support Forum

I became interested in Thunderbird again after the renovations, and I installed it just now, keeping my Outlook client as the default email app(reconfirmed in Windows 11 settings). Both my Outlook client 2016 and the new Thunderbird installation are POP3.

    My intent and hope was to not have any past received emails download initially, unless and until I made Thunderbird my default email app.
    However, along with the Thunderbird app download, 900+ emails immediately appeared in my T-bird inbox, which was an unpleasant surprise. So these 900 emails were in my Outlook inbox, apparently. 
    But why did these emails auto-download to Thunderbird at installation, given that Outlook was the default? 
    Doesn't being a non-default email app mean that no emails will show up while the app is in that status? Or, if it does not mean that for Thunderbird, should it not mean that?

I have a brand new install of Thunderbird, and I want to import .mbox files that I converted from Outlook .pst files.

I have seen many support articles saying that to import .mbox files, I need to use the "Local Folders" option in the Folders menu on the left hand side of the main page. I have added the ImportExportTools NG plug-in, but I don't see a "Local Folders" option on my main page.

I must be missing a step. I have attached a screen shot.

Thank you for your help.

When checking my email the 'Thunderbird' status bar says "downloading message' (as normal), but sometimes the message does not appear in my Inbox or any folder.

I'm using Thunderbird 115.12.0 on Linux Ubuntu. The email is downloaded via the POP protocol.

I have checked on the server and nothing is left there.

Using the Thunderbird search function on 'date' only, the e-mails actually in the inbox or folders show up, not the one purported to have been downloaded.

All of my folders are set to 'Unthreaded'.

Any ideas please?

Unable to fix the side by side error, my only option may be to re-install Thunderbird or migrate to Outlook.

My question is whether its feasible to re-install Thunderbird and still preserve my old profile and emails. I haven't done any backups of Thunderbird but do still have all my emails on the server.

Thanks Lance

PS I have tried all the suggested fixes as shown in the following link to the side by side error: https://support.mozilla.org/en-US/questions/1439559#answer-1659630

I've had thunderbird running on my desktop for many years. I tried setting it up identically on my android and it doesn't work. I'm not sure what I'm doing wrong as I run the server side as well. How do you get thunderbird to accept no username or password for the outbound server? I'm using postfix and it only accepts outbound email from my ip address.

Hi, Set up a thunderbird account on advices from experts due to current issues with BT Email in UK. Have set up an account which is working but the contacts are corrupted? In personal address book loads of hash tags and symbols with no details. In Mac OS x has names but most only have telephone numbers. Also have multiple names for same contact as I tried to download again! I use an Apple IMac PC. Is there any easy way to remove all contacts and what is the best way to try again and get contacts to import with full information? I am not very Techy so plain English with any solution would be appreciated. Still have BT account and downloaded to a CSV file when trying.