I need to export out emails from Gmail to an Outlook PST file and it seems slow using this method—Outlook and IMAP/POP3 are kinda slow on archiving.
Is there any other method than going through POP3 or IMAP?
I am quite late to respond the thread. Recently I did the same task which I am going to share.
You can backup Gmail account data by using the free Google takeout tool. But it will create .mbox file for backed up emails which cannot be open or imported directly into MS Outlook. For that you need to convert MBOX file to PST format using a reliable tool available here: http://www.mboxpst.com
Note: The above method is quite lengthy and time consuming. So I will suggest you to configure your Gmail account with MS Outlook and download folders/messages into PST format by using free POP3 mail server.
There, I found one more solution that is SysTools Gmail Backup Tool
This helps user To backup Gmail mailbox items into the various format such as EML, PST, MBOX, MSG & EMLX.
I just found this solution in above ref. link. Request to try the demo before purchasing.