Use the PST to MBOX converter to convert the Free PST to the MBOX Full version. It enables me to convert PST files to MBOX formats without losing or corrupting data. On the internet, there are a few alternatives for exporting PST to MBOX. It's one of the safest and most dependable strategies for achieving the best migration outcomes. All PST files were successfully converted to MBOX with 100 % results.
Read more:- Convert PST to MBOX
Convert MBOX to PST Using Email Clients
Run Apple mail in your system.
Go to File >> Import mailbox option.
Now select the source of the MBOX file and click continue.
On browse location, choose MBOX file then click continue.
After the import process complete, click done.
Jimmy