📨 Welcome to Postwing
Postwing is developer-first email infrastructure for SaaS, Web3 products, startups and anyone building software that needs reliable email.
Send transactional and bulk email through REST API, SMTP or Python SDK — while Postwing handles the infrastructure behind it.
✓ Automated DKIM, SPF & DMARC
✓ Templates and localization
✓ Delivery, bounce and open webhooks
✓ Inbound email → webhook
✓ Terraform-managed templates
✓ Pay-as-you-send pricing
✓ USDC payments on Base & Ethereum
Build your product. We’ll handle the email infrastructure.
🌐 https://postwing.app
📚 https://postwing.app/docs
August 10, 2026 2
