Do you have only a local version of your emails or have they been previously downloaded? You can easily upload them to GoldFynch. Learn how to do so
Step 1. Launch Thunderbird
Step 2. Select the folder that you want to export the emails from
Step 3. Select all emails in the folder by pressing Ctrl+A. Or, select the specific emails that you want to export
Step 4. Click the menu button to display the Thunderbird menu
Step 5. Select Save as> File
Step 6. Select the folder where the emails should be saved
Step 7. Click Save
Once the mbox is created you can upload it to GoldFynch