jeena/email-forwarder
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email-forwarder/README.md
Jeena 02f6461cbc Rename main.py to email_forwarder.py and fix systemd variable expansion 
- Rename main.py to email_forwarder.py for better readability
- Update systemd service to use  in ExecStart and EnvironmentFile,
  remove WorkingDirectory to fix expansion issues
- Update install.sh and README references
- Drop-in sets PROJECT_DIR for runtime expansion

Changes:
- File rename: main.py -> email_forwarder.py
- Service: ExecStart and EnvironmentFile now use
- Docs: Updated to reflect new script name
2026-01-04 18:16:37 +09:00

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Email Forwarder

This script forwards new emails from a source IMAP account (e.g., GMX) to a destination IMAP account (e.g., MXRoute), avoiding duplicates by tracking Message-IDs.

Setup

Run the install script: ./install.sh

This will set up the virtual environment, systemd services, and provide post-install instructions.

Configuration (.env)

  • SOURCE_HOST: Source IMAP server (e.g., imap.gmx.com)
  • SOURCE_PORT: Port (default 993)
  • SOURCE_USER: Source email/username
  • SOURCE_PASS: Source password
  • DEST_HOST: Destination IMAP server (e.g., yourserver.mxrouting.net)
  • DEST_PORT: Port (default 993)
  • DEST_USER: Destination email/username
  • DEST_PASS: Destination password
  • FOLDERS: Folders to sync (default "INBOX,Sent"; use "all" for all folders or comma-separated list)
  • DRY_RUN: Set to true for testing without forwarding (default false)
  • UPTIME_SUCCESS_URL: URL for success ping
  • UPTIME_FAIL_URL: URL for failure ping

How It Works

  • Uses time-based search (SINCE) with last_run.txt to find emails since last run.
  • Extracts Message-ID, checks against local file and destination IMAP for duplicates.
  • Forwards via IMAP APPEND; updates last_run.txt on success.
  • Logs activity; systemd handles Uptime Kuma pings.

Monitoring with Uptime Kuma

  • Success: Pings ${UPTIME_SUCCESS_URL} after forwarding.
  • Failure: OnFailure pings ${UPTIME_FAIL_URL}.

Troubleshooting

  • Logs: journalctl --user -u email_forwarder.service
  • Test: source venv/bin/activate && python email_forwarder.py
  • Timezone issues: Adjust UTC offset in script if needed.