If you want to convert PST to MBOX Thunderbird so you should try eSoftTools PST to MBOX Converter Software. which is a great option. It has a lot of simple, easy, and gentle actions. During the PST to MBOX conversion, email properties are maintained. The software can convert PST to MBOX along with every mailbox item such as – emails, contacts, calendar, attachments, task, notes, and more. All consumers have access to the demo version, which is free to use for all users. You can convert up to 25 email items per folder in the demo version.
To convert PST to MBOX file format then simply make use of this most straightforward application known as PST to MBOX Exporter tool. With this utility, you can smartly convert PST files to MBOX file formats without facing any kind of problem. All users can try the free demo version of this for making a free conversion of a few PST files to MBOX file format free of cost.