# 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 and using time-based searches.

## Setup

1. Copy `.env.example` to `.env` and fill in your IMAP credentials, Uptime URLs, and settings.

2. Create virtual environment: `python -m venv venv`

3. Activate and install: `source venv/bin/activate && pip install -e .`

4. For user services (recommended):
   - Copy services: `cp *.service *.timer ~/.config/systemd/user/`
   - Copy drop-in: `cp -r email_forwarder.service.d ~/.config/systemd/user/`
   - Edit `~/.config/systemd/user/email_forwarder.service.d/override.conf` to set `PROJECT_DIR` to your project path.

5. Reload and enable: `systemctl --user daemon-reload && systemctl --user enable email_forwarder.timer && systemctl --user start email_forwarder.timer`

6. Check status: `systemctl --user status email_forwarder.timer`

## 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
- `FOLDER`: Mailbox folder (default INBOX)
- `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}`.

## Dependencies

- imaplib, email (built-in)
- python-dotenv, imap-tools
- systemd (for user services)

## Troubleshooting

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