Reading .mbox files

Suppose you have found yourself in want of leaving an email provider. You have figured out how to export all of your old emails into a file and you have that file on your computer. How do you go about reading those old emails? Your current email client may have a way of import .mbox files, but let's assume you just want to quickly search for something and not bother with a lot of setup. One method is through Thunderbird.

Steps

Download and Install Thunderbird
Open Thunderbird and decline all invitations to add an account, at this stage it will create a section called `Local Folders`
Right-click `Local Folders` and go to settings.
Navigate to the section titled `Local Directory` and click `Browse...`
Select the folder that your .mbox file is located within.
Restart Thunderbird
Click the email tab and the local folder section will be populated with `Trash`, `Outbox`, and a folder name that matches the title of your .mbox file.