Introduction CPU vulnerabilities like Spectre, Meltdown, ZombieLoad, and their variants affect nearly every modern processor. Mitigating these vulnerabilities requires a …

Introduction DNS-based Blackhole Lists (DNSBL), also known as Real-time Blackhole Lists (RBL), are one of the oldest and most effective anti-spam techniques. By querying a …

Introduction DNS split-view (also known as split-horizon DNS or DNS views) is a technique where a single DNS server returns different answers depending on the client’s source …

Email attachments arrive in many proprietary formats — Microsoft OLE documents, TNEF-encoded winmail.dat files, and complex MIME multipart structures. Server-side extraction tools …

Email disclaimers, legal footers, and corporate signatures are mandatory requirements for many organizations. Whether you need to append legal notices to outbound emails, add …

Introduction Email remains the number one attack vector for organizations of all sizes. Phishing, malware attachments, spam, and business email compromise (BEC) attacks all enter …

Introduction Swap space is a fundamental component of Linux memory management, but its security implications are often overlooked. When a server runs low on RAM, the kernel writes …

Introduction Despite being decades-old technology, fax remains a critical communication channel in healthcare, legal, government, and financial sectors. HIPAA compliance …

Why Self-Host Your Fitness Tracker? Your health and fitness data is among the most personal information you generate. Commercial fitness apps collect detailed profiles of your …

Why Self-Host Your Metrics Backend? Running your own metrics collection and storage infrastructure gives you full control over data retention, query performance, and infrastructure …

Introduction When running self-hosted email infrastructure at scale, directing IMAP and POP3 clients directly to your backend mail store creates several problems. Each client …

Introduction While network storage systems like Ceph and Longhorn power enterprise Kubernetes clusters, many workloads perform best with directly attached storage — databases, log …