Viewable by the world
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Google does not support a direct import of .mbox files so you may need to use a 3rd party tool to open .mbox format export into Thunderbird or Apple mail.
Gmail does however support a pop3 email transfer for from other email accounts that may be usefulinto your Gmail account, go here: https://commons.lbl.gov/pages/viewpage.action?pageId=48369318
Other Web articles that may be useful:
- How to View Gmail Export Locally on your Computer, go here:
- How to load your mbox export to Gmail account via 3rd Party tools, go here:
- Create Gmail exports/imports via GYB utility, go here
- Google Open source tools to import mail into Gmail, go here
- Sending (actually bulk forwarding) email to another user or email account (to access the Email Forwarding Tool, click here and our FAQ is here)