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Case Study

Mailhop

Self-hosted email aggregator service built in Go. Routes transactional emails through multiple providers (Brevo, Resend, Mailgun, SendGrid, Postmark, Zoho) with automatic fallback when daily limits are hit. ~900 free emails/day.

1 min read
GoPostgreSQLEchoGORMREST API

Problem

Single email provider easily hits limits and fails silently.

Solution

Built Mailhop in Go with multi-provider routing, fallback chain, and per-provider usage tracking.

Impact

Up to ~900 emails/day free tier capacity with much better reliability and no single-point failure.