How to Secure a New Ubuntu VPS: 10 Essential Steps
Learn how to secure a new Ubuntu VPS with ten practical steps. Set up SSH keys, protect administrator access, configure UFW, enable…
Category: Tutorials
Step-by-step how-to articles for beginners and advanced users
How to Host n8n Automation Workflows on a Linux VPS
Learn how to host n8n automation workflows on a Linux VPS using Docker Compose. Set up secure HTTPS access, persistent storage, webhooks,…
How to Fix a Stuck Email Queue on a Linux SMTP Server
Learn how to fix a stuck email queue on a Linux SMTP server. Check Postfix and Exim queues, read delivery errors, repair…
How to Check if Your SMTP VPS IP Is Blacklisted
Is your SMTP VPS IP blacklisted? A blocklist entry can cause email rejections, but it does not explain every spam-folder problem. Providers…
SMTP Port 25 vs 465 vs 587: Which Port Should You Use?
Confused about SMTP ports 25, 465, and 587? Learn which port handles mail-server delivery, which ports support authenticated submission, how TLS differs,…