Today's Deep-Dive: Modoboa

Today's Deep-Dive: Modoboa

From Deep Dive by GzEvD mbH

May 22, 2026 · 22 min · Episode 407

About this episode

The episode discusses the benefits and technical aspects of self-hosting email infrastructure using Modoboa, an open-source solution.

This deep dive explores the compelling case for self-hosting email infrastructure using an open-source solution called Modoboa. The discussion begins by contrasting the high, fixed software-per-user costs associated with major providers like Microsoft and Google against Modoboa’s model, which offers unlimited scalability across multiple business units without per-user fees. The episode breaks down the technical architecture, detailing how Modoboa handles transit security through TLS encryption, automated SSL certificate provisioning via Let’s Encrypt, and multi-layered sender reputation verification using SPF, DCIM, and DMRs to safeguard against spam and spoofing. A significant attention is paid to the security concerns surrounding self-hosting, addressing fears about botnets and spam exposure by examining Modoboa’s proactive monitoring of DNSBL blacklists. Furthermore, the episode examines the long-term viability of open-source, highlighting Modoboa’s massive global user base, community support via forks, and permissive ISC licensing. The conversation concludes by addressing the operational concerns of self-hosting, showing how Modoboa offers professional, transparent support…

Topics covered

  • self-hosting
  • email infrastructure
  • open-source solutions
  • security
  • digital independence
  • Modoboa

Keywords

  • self-hosting
  • email
  • Modoboa
  • security
  • open-source
  • TLS encryption
  • data sovereignty

Mentioned in this episode

Organizations: Modoboa, Microsoft, Google, Let’s Encrypt, DNSBL, ISC

More episodes of Deep Dive

Explore listener stats, chart rankings, contacts and more on the Deep Dive podcast page.