The PST to MBOX converter by KDETools is the best tool with  many advanced features like conversion facility, search, free preview, filter, fastest conversion, etc. PST to MBOX Converter (https://www.kdetools.com/pst/mbox/)converts the whole PST data into desired MBOX format at once even the file is damaged or corrupted. Users can convert items in the desired file formats like PST, EML, MBOX, Archive, and MSG. This utility has a great user interface and compatible with all the Windows Mac, Linux operating systems.This advanced  tool Supports all Files, Convert Exchange, IMAP, Orphan, Hotmail OST files. This converter also provides you the facility to Move OST items to Gmail A/c directly. 

Read More: https://www.techsite.io/p/1382705/t/convert-pst-to-mbox.html

Advik PST to Gmail Import is quite comprehensive application which allows you to import your Microsoft Outlook Emails to Gmail without any file size limitation. This software can be workable on all version of Windows such as Windows 10, 8.1, 8, 7, XP etc. Import PST to Gmail without losing any of your email attachment files. The best part of this software is that it will maintain the folder structure as well as the meta data such as CC, BCC, Attachments, Sender and Reciever Details etc.
Key Feature
Maintains folder hierarchy
Bulk Transfer
Support Multiple Languages
Retains Meta Data Properties
Free Fully Functional tool
Read More : https://gallery.technet.microsoft.com/office/outlook-emails-to-gmail-ddeb2902