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# Demians Blog

> Mein persönlicher Blog über Open-Source Technologien, Hostinglösungen, Linux und den ganzen Rest.

## Recent Posts

### Spaceship Distrobox

# How I Solved the Distrobox Confusion in My Terminal

Recently, I found myself struggling with something that seemed like a simple problem: when I was …

January 4, 2026 •
291 words •
2 min

### Google Groups Spam

# Understanding the Google Groups Spam Problem

Over the past year, I’ve noticed a significant increase in spam messages originating from Google …

October 10, 2025 •
722 words •
4 min

### Blocking Invalid Recipients Before They Reach Your Exchange Server

Recently, I had to deal with a serious problem: backscatter.
One of our mail gateways ended up listed on the backscatter.org blacklist for sending …

August 1, 2025 •
762 words •
4 min

### Dovecot Index Cache Issues

# Understanding `dovecot.index.cache`

I recently migrated an old mail server system into its new home. After the migration, I checked the logs and noticed …

May 18, 2025 •
592 words •
3 min

### Introduction

# Welcome to My Blog!

I’m Demian, a Sysadmin, Email Infrastructure enthusiast, and a passionate Open Source contributor. This is where I’ll be sharing …

May 11, 2025 •
236 words •
2 min