Thunderbird can’t import a .pst or .ost file. Most import tools and Thunderbird require that a compatible version of Outlook be installed on PCs used to Convert Outlook .pst files to Thunderbird and To import messages from Outlook to Thunderbird, Outlook should be the default mail client. Mail import from Outlook works by using the Outlook program for email sources, not the built-in .pst file. Note that Thunderbird is a 32-bit program, so it can not be imported from the 64-bit version of Outlook.
How to Convert Outlook .pst files to Thunderbird?
If you want to switch to Thunderbird and will no longer have access to Outlook, we will guide you through the process of transferring your .pst and .ost files to Thunderbird.
- Search your local .pst and .ost files
Outlook will store your .pst and .ost files anywhere in the App Data folder for Windows user: For example, look for Microsoft Office sites for locations of Outlook 2007, Outlook 2010, and Outlook 2013. You may have at least two mail files, both of which will need to be imported into Thunderbird. Whether it is in PST (outlook.pst, archive.pst) or Ost (outlook.ost) format, depending on which type of mail server and what Outlook you are using then, convert outlook .pst files to Thunderbird
- Convert your emails from .pst and .ost files to mbox
- Find your Thunderbird “Local Folders”
Open the Mozilla Thunderbird, Right click on “Local Folders” then choose “Settings”. Now you will see “Local directory” for your “Account Settings”.
Something like this,
(You will have to allow “Show hidden files, folders, and drives)
- Copy mbox files into the Local Folders
Exit the Thunderbird and go to your “Local Folders” directory in an explorer and drag and drop your mbox files in that destination.
- Browse mbox
Restart Thunderbird, and you can see the mailbox in your Local Folders list.
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