August 17, 2025 - Hayden's Server Room

Exchange 서버 SMTP 릴레이 주소 설정하는 방법

Exchange 서버에서 애플리케이션이나 디바이스가 외부로 메일을 발송해야 할 때, SMTP 릴레이 설정은 필수입니다. 특히 프린터, 스캐너, 서버 모니터링 도구 등이 […]

What Is RAG? How AI Learns to Stop Making Things Up
If you’ve ever watched an AI confidently state something completely wrong, you’ve witnessed hallucination firsthand. RAG — Retrieval-Augmented Generation — is the architectural pattern… Read more: What Is RAG? How AI Learns to Stop Making Things Up
Excel XLOOKUP #SPILL! Error: How to Fix!
If you’ve upgraded to Microsoft 365 and suddenly your XLOOKUP formulas are throwing a #SPILL! error where nothing used to fail — you’re not… Read more: Excel XLOOKUP #SPILL! Error: How to Fix!
Meta’s AI Glasses — The Post-Smartphone Era Is Already Here
In 2026, a device that surfaces information in your line of sight without pulling out your phone — and lets you control it with… Read more: Meta’s AI Glasses — The Post-Smartphone Era Is Already Here
Notion AI vs Obsidian : Who Wins the Productivity Tool War?
In 2026, the two giants of the productivity tool market are still Notion and Obsidian. One is a San Francisco unicorn valued at $10… Read more: Notion AI vs Obsidian : Who Wins the Productivity Tool War?
Why Discord Owns Gen Z’s Online Communities
Ask a Gen Z college student what app they use to hang out with friends online, and the answer probably isn’t Instagram DMs or… Read more: Why Discord Owns Gen Z’s Online Communities