Monitoring Proxmox Snapshots – Why It Matters More Than You Think
In virtualized environments, snapshots are a powerful safety net. Whether you’re patching a critical system, updating a legacy...
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...
Never Miss a Bounce Again: Track Postfix Delivery Failures Automatically
When you’re waiting for an important email that never arrives, it can be frustrating — especially when there’s...
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...
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...
How to delete the entire Git History
There are situations where you want to keep your project files but get rid of the entire Git...