Dump all Email from GMail via API (no IMAP). Very useful if your GMail administrator disabled IMAP for "security" reasons.

1. Clone this code, I tested it with Python 3
2. Go to Google API Developer Console and create a set of client credentials enabled for the GMail API
3. Download the credentials JSON and save as client_secrets.json
4. Install Virtualenv
5. Create virtualenv with virtualenv -p python3 venv
6. Activate virtualenv with source venv/bin/activate
7. Install Google API Client Libraries with pip install google-api-python-client
8. Run code with python gmail-dump.py.

On first run your browser should open up and ask for your Google Authorization. It will then download all Email into the maildir folder mail.

You can use mutt like mutt -f mail to browse through the downloaded email.

On successive runs the script will only download new messages. Ideal for running as a nightly cron job.

• I use the message ID as file name for the mail files, it seems to work so far. Please report if you have a problem with that.
• This script just dumps the bare email and completely ignores any labels. Pull requests are welcome.