FreeResend

Provides a self-hosted email sending service that is API-compatible with Resend and routes mail through Amazon SES to lower per-email costs and retain infrastructure control. Serves developers and business teams managing transactional and application email, including startups and small teams running multiple projects. Positioned as an open-source MIT-licensed alternative to premium email APIs, offering drop-in compatibility by changing a base URL and paying SES rates instead of vendor pricing.

Key features

• DKIM signing, SPF and DMARC support
• Multi-domain support with automatic verification
• Auto-creates DNS records with DigitalOcean
• Comprehensive logging and delivery tracking
• RESTful APIs with SDK compatibility
• Webhook support for bounces and complaints
• SES production access request helper
• DNS readiness checker
• Deliverability smoke-test script outline