Save MBOX Files to Adobe PDF Format
I suggest you use the CubexSoft MBOX to PDF Converter to export MBOX emails to PDF file format. It is also important that the tool offers several conversion options in one installation. In addition, it allows you to convert MBOX files into PDF with all Windows OS including 11, 10, 8.1, 7, XP, Vista, and so on. All of these MBOX to PDF conversion features allow you to access MBOX files in almost any email conversion program be it Thunderbird, Apple Mail, Eudora Mail, Netscape, etc.
Read More: https://www.cubexsoft.com/mbox/pdf.html
Amelia James commented
Try MacSonik MBOX to PDF Converter Tool to convert MBOX files into PDF easily. It is the most reliable and advanced solution to convert single or multiple MBOX files into PDFs with or without email attachments. Users can also save the email attachments in a separate folder without any data alteration. MBOX to PDF converter tool can perform the bulk conversion of MBOX files and remove duplicate emails from the conversion process. Users can opt for Mail Filter & Custom Folder Name to convert selected emails only and set the desired name of the resultant file.
For more info. https://www.macsonik.com/mbox/pdf/