Initial commit: Multi-account IMAP sync with OAuth2 support

.env.example

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+# ============================================================
+# Email Sync OAuth2 - Docker Compose Configuration
+# ============================================================
+# Copy this file to .env and edit your settings.
+# ============================================================
+
+# ------------------------------------------------------------
+# Global settings
+# ------------------------------------------------------------
+
+# Number of accounts to sync
+NUM_ACCOUNTS=2
+
+# Sync interval in seconds (default: 21600 = 6 hours).
+# Used when SYNC_CRON is empty.
+SYNC_INTERVAL=21600
+
+# Optional standard five-field cron expression. When set, it overrides
+# SYNC_INTERVAL. Example: 0 */6 * * * (every six hours)
+SYNC_CRON=
+
+# Run once and exit (true/false)
+ONCE=false
+
+# Token and log directories inside container
+TOKEN_DIR=/tokens
+LOG_DIR=/var/log/imapsync
+
+# ------------------------------------------------------------
+# Account 1: Hotmail / Office 365 -> Mailcow (OAuth2)
+# ------------------------------------------------------------
+
+ACCOUNT_1_SOURCE_HOST=outlook.office365.com
+ACCOUNT_1_SOURCE_USER=[email protected]
+ACCOUNT_1_SOURCE_AUTH=oauth2
+ACCOUNT_1_SOURCE_PROVIDER=office365
+ACCOUNT_1_SOURCE_TOKEN=/tokens/user1_hotmail.token
+
+ACCOUNT_1_DEST_HOST=mail.hoelee.com
+ACCOUNT_1_DEST_USER=[email protected]
+ACCOUNT_1_DEST_PASS=your_mailcow_password
+
+# Delete emails on destination that don't exist on source (true/false)
+ACCOUNT_1_DELETE=false
+
+# Dry run - log what would happen without actually syncing (true/false)
+ACCOUNT_1_DRY_RUN=false
+
+# Extra imapsync options (optional)
+ACCOUNT_1_EXTRA_OPTS=
+
+# ------------------------------------------------------------
+# Account 2: Any standard IMAP source (password authentication)
+# ------------------------------------------------------------
+
+ACCOUNT_2_SOURCE_HOST=imap.example.com
+ACCOUNT_2_SOURCE_USER=[email protected]
+ACCOUNT_2_SOURCE_AUTH=password
+ACCOUNT_2_SOURCE_PASS=your_source_password
+
+ACCOUNT_2_DEST_HOST=mail.hoelee.com
+ACCOUNT_2_DEST_USER=[email protected]
+ACCOUNT_2_DEST_PASS=your_mailcow_password
+
+ACCOUNT_2_DELETE=false
+ACCOUNT_2_DRY_RUN=false
+ACCOUNT_2_EXTRA_OPTS=
+
+# ------------------------------------------------------------
+# Account 3+: copy an account block and increase NUM_ACCOUNTS.
+# All ACCOUNT_N_* variables from .env are passed into the container.
+# ------------------------------------------------------------
+
+# ------------------------------------------------------------
+# Optional SMTP notifications
+# ------------------------------------------------------------
+
+# none | batch_success | account_success | failure
+# batch_success: one email after every fully successful sync batch
+# account_success: one email for every successful account
+# failure: one email when one or more accounts fail in a batch
+NOTIFY_MODE=none
+
+# Required only when NOTIFY_MODE is not none
+SMTP_HOST=
+SMTP_PORT=587
+SMTP_USER=
+SMTP_PASS=
+SMTP_FROM=
+# One or more comma-separated recipients
+SMTP_TO=
+# starttls (port 587), tls (implicit TLS, usually port 465), or none
+SMTP_TLS=starttls