- mailer.js: add requireTLS to force STARTTLS before AUTH on internal relay
- docker-compose.yml: use network_mode:bridge to reach 172.17.0.1:2587 SMTP relay
and switch to ${SMTP_HOST:-172.17.0.1}/${SMTP_PORT:-2587} defaults
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- rejectUnauthorized: false (relay cert is for mail.keylinkit.net, not 172.17.0.1)
- connection/greeting/socket timeouts for reliability
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>