Matrix Notifications for Checkmk – Modern, Secure, and Self-Hosted Alerting
Still sending monitoring alerts via email or relying on closed messaging platforms? In an age where digital sovereignty...
Making fail2ban Easier – with a Simple Helper Script
What is fail2ban? fail2ban is a security tool for Linux servers that helps prevent brute-force attacks. It works...
Google Groups as a Spam Vector
Introduction If you’re operating a modern mail system and rely on technologies like SPF, DKIM, and DMARC, you...
Automating Spam Training with rspamd-learn-helper
Fighting spam is a constant battle. Even with powerful tools like Rspamd, it’s easy to forget to regularly...
Real-Time UPS Alerts via Telegram
Why Worry About Your UPS? If you run any kind of server – whether it’s a home lab,...
Scripted Windows App Installation for Consistency
Modern Windows systems offer several ways to install applications—primarily via the graphical Microsoft Store or winget, the Windows...
Expunge old mails by folder and age in Dovecot
Keeping mailboxes lean is essential for performance and storage management on self-hosted email servers. Over time, folders like...
Quick and complete Maildir usage summary
Managing Maildir mailboxes across multiple users can quickly become a challenge. How do you find out who’s using...
Let’s Encrypt certificates behind a Load Balancer
Let’s Encrypt and Certbot make issuing and renewing TLS certificates easy — until your servers sit behind a...