twilio-email

Purpose

Enable OpenClaw to implement, operate, and troubleshoot SendGrid (Twilio) transactional email in production:

• Send transactional emails via SendGrid v3 API with correct auth, retries, idempotency, and observability.
• Use Dynamic Templates (Handlebars) safely (escaping, conditionals, loops), versioning templates, and rolling out changes.
• Process SendGrid Event Webhook (delivered/open/click/bounce/spamreport/dropped/deferred) with signature verification and replay protection.
• Manage suppressions (bounces, blocks, spam reports, unsubscribes) and implement list-unsubscribe correctly.
• Configure domain authentication (SPF/DKIM/DMARC), dedicated IPs, IP warming, and bounce/spam handling.
• Integrate with Twilio cluster patterns (rate limiting, webhook retry logic, error taxonomy, cost/throughput tradeoffs).

This skill is for engineers building reliable email delivery pipelines and maintaining them under real traffic, compliance constraints, and deliverability requirements.

Prerequisites