Blog & Articles
Thoughts on engineering
and email infrastructure
Deep dives into SMTP infrastructure, email deliverability, software architecture, and lessons from 7 years building production systems at Netcode.
Mastering SMTP Deliverability: A Complete Guide for Engineers
Everything you need to know about configuring SMTP servers, warming IPs, and ensuring your emails land in the inbox rather than the spam folder.
How I Built Email Butler: Architecture of a 5M/Month Email Platform
A deep dive into the technical architecture behind Email Butler — from queue design to retry logic, analytics, and real-time monitoring.
SPF, DKIM, and DMARC Explained with Real-World Configurations
Authentication protocols demystified. Learn how to properly configure SPF, DKIM, and DMARC records with practical DNS examples and troubleshooting tips.
Optimizing SMTP Server Performance: From 100 to 10,000 TPS
Lessons learned scaling mail servers. Connection pooling, queue management, TLS optimization, and hardware considerations for high-throughput email delivery.
Email Automation Patterns Every SaaS Should Implement
Transactional, behavioral, and lifecycle email patterns. Webhook handling, template management, A/B testing infrastructure, and unsubscribe compliance.
The Email Engineer's Debugging Playbook
Systematic approaches to diagnosing bounce codes, blacklist issues, slow delivery, and reputation drops. Tools, logs, and monitoring strategies that work.
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