Building a Production-Ready Email Delivery Engine
Learn how to build a robust email delivery engine with circuit breakers, exponential backoff, MX resolution, and comprehensive monitoring. Based on a real production email server implementation.
Email Server
5 articles tagged with "Email Server".
IMAP IDLE Implementation: From Crashes to Production
A deep dive into implementing real-time email notifications using IMAP IDLE, chronicling three crashes, library bugs, and the journey to production-grade instant email delivery with Go. Learn about goroutine race conditions, go-imap v1 vs v2, and O(1) file access optimizations.
Database Schema Design for Email Infrastructure
Deep dive into designing a robust database schema for email infrastructure. Learn from 8 progressive migrations covering domains, users, mailboxes, messages, DKIM, Sieve filtering, and more with practical SQL examples.
Debugging IMAP Crashes: The Nil Pointer Nightmare
A deep dive into debugging three critical IMAP server crashes caused by nil pointer dereferences. Learn how we tracked down and fixed SELECT response crashes, BODYSTRUCTURE panics, and capability advertising issues in production.
DKIM Implementation: From Signing to Auto-Rotation
A deep dive into implementing DomainKeys Identified Mail (DKIM) in a production email server, covering key storage abstraction, signing workflows, multi-domain pool management, and automated key rotation.