To import Outlook mails into Thunderbird with help of third-party tool i.e. PST to MBOX Converter software. This software offers preview facility to view all loaded data items before final conversion process. There is no file size limitation, you can converts n number of files at a time without any data loss. It has simple and easy interface, so anyone can easily operate this software without having any technical knowledge. It allows user to batch import Outlook mails into Thunderbird without any error. Supports all the MS Outlook editions like – 2019, 2016, 2013, 2010 and etc. And also supported all Windows OS including Windows 11.