The VolkNode Blog
Practical tutorials on VPS hosting, Port 25 SMTP setup, performance tuning, and infrastructure deep-dives — written by the team that runs the servers.
How to Open Port 25 on a VPS: Complete Postfix SMTP Setup Guide
A step-by-step walkthrough of setting up Postfix with SPF, DKIM, and DMARC on a VPS with Port 25 open — so your mail actually reaches the inbox.
Why Most VPS Providers Block Port 25 — and How to Get It Open
AWS, Google Cloud, and DigitalOcean all block outbound Port 25 by default. Here's why, what your options are, and how to pick a VPS where SMTP Just Works.
4 min read
VPS vs Shared vs Dedicated Hosting: Which Should You Pick in 2026?
A no-marketing-fluff comparison of shared hosting, VPS, and dedicated servers — with exact thresholds for when to move up the ladder.
4 min read
How to Benchmark a VPS: Real Tests for CPU, Disk, Network & Latency
Stop trusting marketing numbers. Run these four tools on any VPS and you'll know in ten minutes whether it's actually as fast as the spec sheet claims.
4 min read