backend-transactional-email
Installation
SKILL.md
Transactional Email Skill
Purpose
Build reliable, deliverable, and compliant transactional email systems using proven provider integrations, responsive MJML templates, and deliverability best practices.
Architecture Decision Trees
Provider Selection
| Criterion | Amazon SES | SendGrid | Resend | Postmark | SMTP (self) |
|---|---|---|---|---|---|
| Volume pricing | $0.10/1K (62K free) | $19.95/50K | Free tier: 3K/mo | $10/10K | Infrastructure cost |
| Deliverability | Good (reputation shared) | Good | Excellent (dedicated IP) | Excellent | Depends on setup |
| Template engine | Custom HTML | Dynamic templates | React Email / MJML | Custom HTML | Any |
| Webhooks | SNS + SQS | Event Webhook | Webhooks (built-in) | Webhooks | Custom |
| Open/click tracking | SES Config Set | Built-in | Built-in | Built-in | Custom |
| Dedicated IP | Yes (paid) | Yes (paid) | Yes | Yes | Yes |
| API style | AWS SDK / SMTP | REST / SMTP | REST (simple) | REST / SMTP | SMTP |
| Best for | High volume, AWS shops | Mid-volume marketing | Modern DX, dev teams | Transactional only | Full control |