In this episode, we take a deep dive into SuperTokens, an open-source authentication platform built to help developers and organizations regain control over one of the most critical layers of modern software: user identity. Starting with the headaches of building authentication from scratch or relying on expensive proprietary vendors like Auth0, AWS Cognito, and Firebase, we explore how SuperTokens offers a different path through self-hosting, modular architecture, and full ownership of user data.

Along the way, we unpack how the system works under the hood, from front-end and back-end SDKs to the standalone core service that handles cryptographic security, session management, and database operations. We also look at why the project chose Java for its core, how it achieves performance through local token verification, and what features it brings out of the box, including passwordless login, social sign-in, MFA, SSO, multi-tenancy, plugins, and seamless user migration from legacy auth providers. More than a technical walkthrough, this episode is about data sovereignty, escaping vendor lock-in, and what it means to truly hold the master key to your own digital identity system.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

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In this episode, we take a deep dive into SquirrelMail, the long-running open-source webmail client that helped define an era of self-hosted internet infrastructure. Starting with its roots in the late 1990s, we explore how SquirrelMail earned a devoted following through its simplicity, flexibility, and fiercely independent philosophy, even making its way into pop culture with a cameo in The Social Network.

Along the way, we unpack the real trade-offs of running open-source communication tools: the security vulnerabilities that had to be patched, the manual maintenance required to keep older systems alive, the huge importance of PHP compatibility, and the plugin ecosystem that allowed SquirrelMail to evolve with features like spam filtering, autocomplete, encryption, and hardware-based authentication. More than a story about one webmail client, this episode is about data sovereignty, digital ownership, and what it really means to choose control over convenience in a world dominated by proprietary platforms.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we dive into OpenTrashMail, an open-source tool that lets you self-host your own disposable email server and reclaim control over one of the internet’s most persistent privacy leaks: your email address. Starting with the everyday anxiety of handing over your inbox just to access a coupon, article, or download, we explore how OpenTrashMail offers a private alternative to public temporary email services by giving you your own domain, your own server, and an unlimited number of disposable addresses you control.

Along the way, we unpack how the system works under the hood, from wildcard inboxes and file-based storage to Docker deployment, MX records, encrypted mail transport, and access controls that keep your throwaway inboxes private. We also look at the platform’s more surprising capabilities, including RSS feeds for newsletters, developer-friendly APIs, webhooks, and automated testing workflows. More than a technical walkthrough, this episode is about privacy, ownership, and what happens when you stop treating your email address as a permanent identity and start treating it as something disposable.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we dive into Cyrus IMAP, a long-standing open-source communications server that quietly powers email, calendars, and contacts for major universities, enterprises, and privacy-conscious organizations around the world. Starting with the risks of handing sensitive communications over to proprietary platforms, we explore how Cyrus’s distinctive “sealed server” architecture protects data integrity, enforces strict access controls, and creates a secure foundation for managing some of an organization’s most critical digital assets.

Along the way, we unpack the protocols and systems that make Cyrus so powerful, from IMAP, JMAP, CalDAV, and CardDAV to modular authentication through SASL, server-side filtering with Sieve, and trust mechanisms like SPF, DKIM, and DMARC. The episode also looks at what makes this decades-old software still relevant today: its scalability, compatibility across devices and clients, and accessibility through modern Linux package managers. More than a technical overview, this is a conversation about digital sovereignty, control, and why owning the infrastructure behind your organization’s communications matters more than ever.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we dive into Raccoon, an open-source, self-hostable invoicing platform built to help freelancers and small businesses take back control of their financial infrastructure. Starting from the risks of relying on proprietary cloud billing tools, we explore how Raccoon offers a more sovereign alternative through custom branding, multi-currency and tax support, dashboard insights, and a modern architecture designed to make professional invoicing both flexible and secure.

Along the way, we unpack how the platform works under the hood, from its front-end and back-end framework to its PostgreSQL database, PDF generation, Docker-based deployment, and encryption keys that protect sensitive financial data. The episode also looks at the bigger picture: why self-hosting matters, how open-source transparency and automated testing can build trust, and what it means to truly own your invoices, client records, and payment history instead of renting access to them from a tech giant.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we take a deep dive into phpList, an open-source email marketing platform designed to give organizations real control over their communications infrastructure. Starting from the risks of relying on proprietary tools from companies like Microsoft or Google, we explore how phpList offers a viable alternative through self-hosting, transparent architecture, strong subscriber management, and the kind of data sovereignty that becomes essential for organizations facing legal, regulatory, and compliance demands.

Along the way, we unpack how phpList handles large-scale email delivery, templating, segmentation, bounce processing, analytics, A/B testing, and privacy-conscious integrations, while remaining accessible to non-technical teams through both hosted and self-hosted options. The episode also looks at the broader philosophy behind open source: lower costs, faster community-driven improvements, no vendor lock-in, and the ability to truly own your audience and your data. More than a software overview, this is a conversation about risk, independence, and what it means to build a communications system you actually control.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we explore what it really means to take control of your own email infrastructure by diving into DragonFly Mail Agent (DMA), a lightweight open-source mail transfer agent built for home and office use. Starting with the basics of how email actually moves across the internet, we unpack the difference between mail clients and mail transport agents, explain why DMA is intentionally outbound-only, and show how that design dramatically reduces complexity and security risk.

Along the way, we look at how DMA balances simplicity with modern security through TLS, SMTP authentication, and a small, auditable C codebase that follows the classic UNIX philosophy of doing one thing well. The conversation also expands into the bigger picture: how open-source tools like DMA lower the barrier to self-hosting, reduce dependence on expensive proprietary ecosystems, and give organizations more control over privacy, compliance, and data sovereignty. More than a technical deep dive, this episode is about rethinking digital infrastructure and asking where a simpler, more focused tool might serve us better than today’s bloated black-box platforms.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we take a deep dive into the Courier mail server and explore what really happens when you hit “send.” What seems like everyday digital magic is actually a complex system of protocols, safeguards, and design choices built to move messages reliably across the internet. Using Courier as our guide, we unpack the role of the mail transfer agent, explain why Courier’s integrated approach stands out, and show how its Maildir-based architecture prioritizes speed, stability, and data safety over convenience.

Along the way, we look at Courier’s famously strict philosophy on security and standards, from rejecting malformed email and broken MX records to making open relays nearly impossible by default. We also explore the practical side of running your own mail infrastructure, including community-built admin tools, spam mitigation, rate limiting, large-scale proxying, and even Courier’s surprising fax gateway. More than a technical story, this episode is about digital ownership: what it means to control your own communication systems in a world dominated by convenient black-box platforms like Gmail and Outlook.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

What happens when one of the internet’s most critical communication systems is powered by software most people have never heard of? In this episode, we dive into Dovecot, the open-source IMAP server that quietly serves as the backbone of email for some of the world’s largest telecommunications providers, ISPs, and hosting companies.

Dovecot is built for one thing: fast, reliable, secure access to email at massive scale. Written primarily in C for maximum performance, it is optimized to handle huge numbers of simultaneous users while supporting standard mailbox formats like mbox and maildir. But speed alone is not what makes it remarkable. Dovecot uses self-optimizing indexes that adapt to user behavior, making common mailbox operations faster while keeping memory usage lean.

One of the platform’s standout strengths is its self-healing architecture. Instead of crashing when an index is corrupted or a storage glitch occurs, Dovecot can automatically rebuild damaged indexes in the background while keeping the service online. That design dramatically reduces downtime and turns system administrators from late-night emergency responders into proactive infrastructure managers.

We also explore how Dovecot balances strict standards compliance with practical flexibility, acting as a translation layer for buggy email clients while maintaining a clean internal architecture. Its support for SMTP authentication, plugins, Lua scripting, clustered file systems, and large-scale shared storage makes it adaptable for organizations with demanding operational and compliance needs.

At a deeper level, this episode is about the hidden strength of open-source infrastructure: software refined by a global community, trusted by major providers, and powerful enough to replace expensive proprietary systems without sacrificing performance or control.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!

In this episode, we dive into Postfix, the mail server software quietly powering email delivery across the internet, and unpack why its design was such a major leap forward from the fragile, insecure systems that came before it. Starting with the late-1990s problems of Sendmail, we explore how Postfix creator Wietse Venema rethought mail infrastructure around speed, easier administration, and above all, security through modular design and defense in depth.

From there, we trace how Postfix has continued to evolve for the modern era, adapting to containers, cloud-native logging, JSON-based automation, modern databases, stronger encryption, and global email standards like SMTPUTF8. Along the way, the episode highlights the software’s obsession with reliability, from blocking botnets and trickle attacks to its near-paranoid insistence on true disk writes so messages are never lost. More than just a technical story, this is a look at the invisible infrastructure behind every sent email and a reminder that some of the internet’s most important software is built not to move fast and break things, but to endure.

Let’s have a look at your digital challenges together. What tools are you currently using? Are your processes optimal? How is the state of backups and security updates?

Digital Souvereignty is easily achived with Open Source software (which usually cost way less, too). Our division Safeserver offers hosting, operation and maintenance for countless Free and Open Source tools.

Try it now!